Dear Dave, thank You very-very much for the review, and for the suggestions. Yes, USB and ethernet cables may be connected through cable glands. I (Gergely) am happy with the pronounciation, it was really good! :) Best regards, Gergely
Late or not, I still very much appreciate your time to feature and take a brief look at my Protean board! I’m certainly going to try my luck again and hopefully come up with some improvements and possible changes. :D
Those automotive connectors are called Deutz connectors IIRC. They're very nice to work with, but stupidly expensive, like $50 per connector and a buck per pin.
The Rasberry Pi rugged box looks pretty much like that standard ruggedized boxes available from Tyco Electronics. They were made by a company called "Deutsch Connectors" and later acquired by Tyco AFAIK. No custom mold necessary :)
They likely use the usb port because the pi has built-in protection when you use the usb port, while the 5v pin on the header is connected directly to the cpu and there are no pins connected to the 5v regulator.
DHL is good in australia? When I use them, it looks like my packages were dropped from a plane, dragged for 5 miles, pissed on, then drop kicked at my door.
You mean dropping it from a moving plane isn't normal with DHL? That and they LOVE to tack on stupid fees in Canada to collect taxes. From out of country just ship mine via regular mail or air mail please.
After I graduated in 1987, I worked a few weeks for the Dutch royal phone company (PTT). We checked the photographs against a query list from the mainframe. Then the modified/checked list went back to where they came from. They made the changes and the new list plus pictures came back to us and we checked everything again. I told the manager it is more easy to only make a list of the changes. The answer was "you are payed to work, not to think" :-(
The Stylistic 500 was my first home automation panel. I got a lot of them on ebay for a song. I built a special frame that provided power and serial from the attic. I replaced the HDD with a 8MB flash card running a minimal gentoo linux with basic pen services. Could control all kinds of things with it. Was a fun project. This was probably 2001/2002.
'Ratherboard' if you read this - your web page is one of the hardest to read I've come across. Everything is moving randomly including a dynamic background. Couldn't see any contact info. Dave, I think you pronounce Gergely with a silent "L" - Gur-gay.
Dear V8Snail, Thank you very much for the feedback! We will adjust the darkness of the background, and will provide more contact infos today. (facebook page link is already available at the bottom of the page.) Dave's pronounciation is quite good, it is fine :)
I agree. I hate web pages like this, with animated backgrounds and things that scroll at different rates, and low contrast text. Extremely distracting from the information being presented. I've got a 100 megabit internet connection and it takes like 6 seconds to load when normal web pages load in like 0.6 seconds. And "Please Scroll Down?" Reallly? How about you show me something useful on the page when it loads. Grrrr...
Just put text in front of opaque boxes to separate it from the business going on in the background and you will be good. I am dyslexic and reading over that dynamic background makes me dizzy.
I've got to agree with V8Snail, I don't like their home page design either. I viewed it 17+ hours after V8's post so maybe it is already lowered in contrast but I still don't like it. Annoying background video, too much animation, and EXTREMELY big spacing when viewed on a PC at only 100%. Plus a whopping 16MB in size. I wouldn't be wanting to visit too often on a paid mobile connection. This seems to be the fad these days to add lots of space and make you scroll down a mile long page. Not to forget the other annoying fad of having a non scrolling bar at the top. Just because you can doesn't mean you should. If you want to design your page for "mobile" then just detect the connection and provide the big annoying sizes for it but don't make those on a PC or tablet have to view the exact same. THAT BEING SAID, it looks like a cool product and the website design wouldn't stop me from buying the product. A technical note about the graphs at the bottom of the page... recording and showing a separate graph for °C and °F annoyingly fills up the graph especially when the data points are not overlapping. Plot one line for °C and put a second legend on the right for °F if you really have to but they have to line up. At least you didn't have another line for Kelvin! :-) I would really like to see Dave put together some demos for this. Or maybe run some CPU testing programs while monitoring how hot it gets inside while totally sealed and outdoors. It would be interesting to see more about this.
Dear V8Snail, We have removed the background, published a user manual, and today we will launch this discount for a limited time: facebook.com/events/1694349890582436/ Thank You for Your suggestions!!
Daniel S - Kitchen Machine Shop :) This is just the enclosure. The mainboard is the big deal with buffered, protected IO ports and the whole concept. I will be a backer for this project. After when there is ethernet port :)
Sure, the board looks great. It was just that Dave assumed they also made the enclosure, and I read your comment as being about the "rigid quality" of said enclosure. Not taking anything away from the Rather Board in any way. They made a great decision when selecting this enclosure.
The processor architecture on the 48G is interesting in itself; it has 64-bit registers and a 20-bit address width but only a 4-bit interface. It has numerous arithmetic registers including a BCD exponent register which can store values up to 499.
16:20 That should be a "virtual barrier", if you have a large room, you can tell the robot to clean only one side of the room, or it can be used to avoid that the robot falls off stairs
The first item uses Deutsch connectors made by TE, they are the DT series. Coincidentally that box was originally designed for GPS modules on lorries trailers, it is so big so that it can house a battery, when the haulage cpmapny forget where they left a trailer they can look it up. I would guess originally they did not need 48 pins as the box comes in 1, 2, 3 & 4 socket versions, all plugs with different keys.
ratherboard... you should add a new revision where you can screw the boards down right next to the header connectors... that doesn't seem that vibration proof could be a killer feature for most people who need such a case
Just put a tiny little micro with a piezo in your package, have it periodically wake, to count out the several days in transit, then CHIRP.... CHIRP.... CHIRP.... That'll get Dave's attention!
Bombs don't come in "coin cell size". It'd look, to an x-ray, like one of those musical cards. A battery, a chip, a speaker. And of course you don't have it chirp in the mail! Duh! That's what the count is for... You wait for transit to complete. It would start chirping AFTER it gets to Dave.
for the ratherboard i think they chose to power through the usb port instead of the header was so it doesn't negate the power protection circuitry built into the pi. The 5 volts on the header goes strait to the 5 volt rail, no fuse or over/under volt/current FET switches
I think the volume of air inside should be sufficient. Given the level of detail in the design it would be astounding to think the designers overlooked thermals!!!
Johann Wyss Well, they seem to have overlooked powering the Pi from the header pins, instead supplying a short USB cable which when connected fouls some of the board's headers!
Dear Alex Quant, (Somebody already had the same question on our facebook, so we will be able to give You a fast reply.) The short answer to this question is that we did not experience overheating problems in our rooftop weather station application (www.ratherboard.com/#live_demo) during last summer (despite the fact that in Budapest 30-35°C temperature during the day is common). The long answer is a bit more complex: We have done a test to estimate the thermal conductivity of Ratherboard's enclosure. We have put a power resistor and an NTC temperature sensor inside the enclosure, which were connected to Ratherboard's external connector header. The power resistor was connected to a laboratory power supply. The ambient temperature was also measured. During the first measurement the resistor dissipated 4.2W. After 65 minutes the internal temperature became constant (34°C), while the ambient temperature was 23°C. The temperature difference was 11°C and the thermal resistance was 2.63K/W. After the first measurement we increased the voltage and the resistor dissipated 7.56W. After 60 minutes the internal temperature was constant again (42.3°C), while the ambient temperature remained at 23°C which gives a thermal resistance of 2.56K/W. According to this measurement the thermal resistance of the enclosure is approximately 2.6K/W, which means that if you dissipate 1W inside the enclosure then the internal air temperature will be 2.6°C more than the ambient temperature. According to www.raspberrypi.org/help/faqs/#powerReqs the Raspberry Pi 3 model B consumes 1.2A at 5V (worst case scenario with lots of external USB devices connected) , which gives 6W. Ratherboard's other components power consumption is negligible compared to this value. If we assume that Ratherboard's switching power supply has 80% (underestimated for this calculation) efficiency, than the total dissipated power inside the enclosure is 7.5W, which means that the temperature will be 20°C more than the ambient temperature. Let's say that the ambient temperature is 50°C because of direct sunlight, than the air temperature will be 70°C inside Ratherboard's enclosure. According to www.raspberrypi.org/help/faqs/#performanceOperatingTemperature the LAN controller is rated to maximum 70°C temperature. The chip will have higher temperature than the air around it, so in this scenario the chip will probably have higher temperature than the rated maximum value. The above example shows that if the Raspberry Pi works very hard with many peripherals connected to it than you should consider installing heatsinks on the Raspberry Pi and installing Ratherboard in a shady area. Also note that the Raspberry Pi 3 model B typical bare-board current consumption is less than 500mA (www.raspberrypi.org/help/faqs/#powerReqs), which means only 3.2W dissipation, which only means 8.3°C temperature difference. So the system's actual temperature performance is application dependent. For example if you have direct sunlight but lots of airflow than the heat transfer will be much better, hence the thermal resistance will be lower. We did not experience overheating problems in our rooftop weather station application during last summer as I mentioned earlier. The CPU load was not much (below 10%) and the Ratherboard consumed approximately 0.18A at 12V, which gives 2.2W dissipation. This value is the third of the worst case value (7.5W). We have not installed heatsinks on the Raspberry Pi 3 model B. Termal behaviour has to be investigated in every electronics design, of course, a Ratherboard application is no exception.
I don't think they did overlook powering the pi via GPIO, powering it via GPIO bypasses several safety systems not limited to the fuse and BCM. I think their decision was a good one personally, Albeit clunky.
The HP 48SX was the most popular model. It had the two expansion slots built in and you could purchase tons of application cards for the calculator including extra memory cards. I had the chemistry and electrical engineering card and a 512K memory expansion card. Still have it 27 years later! The 48G was cheaper and didn't have the extra slots that everyone wanted back then.
I love my calculators but am fairly young. Just wondering if there was any forums online where I could dicuss and learn about all the cool calculators. I checked reddit and there was nothing.
(re HP) *cries* "I can't do it" --- you're a good man Dave. Keep it intact. Some day someone will send a broken one. btw, "ja" is "yes" in Deutsch/German, pronounced a "yaah" :D
The Stylistic is the successor to a series of computers orignally designed by Poqet Computer Corporation as the Poqet PC. When Fujitsu bought Poqet they discontinued the Poqet PC product but used the Poqet name for a successful series of PC-based tablet computers.
yh but that way they didnt bypass the integrated protection and any problem that might not trigger the rather board protection will trigger the rasp protection and if it doesnt trigger the rasp protection the blame is on the rasp foundation and not the rather board
Still think it would be better to have the option to power it from the GPIO , that micro USB is not that rugged and it would also allow for fast swap out of the Pi, swapo the sd and BOOm your done , push it back on the headers. The Pi is so cheap you could consider it expendable, ease of service and speed of service are the most important i think, at least for this application.
This is the best marketing strategy I could think of, sending a prototype to a worldwide known channel during their indiegogo campaign, genious! Btw, this stuff looks good :3
I still use a 48GX... I had a 48G when I started, and eventually went to a 49, but it was stolen. I also have an emulator for this calculator on my phone.
I thought I knew of most of the Windows variants, but I've never heard of Windows for pen computing 1.0. I'm guessing that product line didn't last much past version 1.0.
Darren Jacobson I think Windows for Pen 1.0 was the pen computing extension for Win 3.1x . Microsoft got themselves some patents for how they converted pen touches into mouse actions. Later they used those patents (and some Windows Mobile / CE patents) to sue Android smartphone makers for royalties.
That Stylistic device has a cataract on the LCD. The layers have delaminated. Easy fix. Just heat and separate, replace what needs removed and relaminate.
That would have got me shot or at very least fired. I had a job setting up and installing GPS tracking and location services, security systems, lighting and other electronic services / devices into blast trucks for the mining sector. They were vehicles which would transport and set the "prill" (ANFO explosives) and their detonators. Naturally there had to be redundancies for everything. These connectors were chosen for there seal-ability and their insulation properties etc. Excellent connectors and it shows the level of quality and ruggedness the designers of the raspberry pie boredom thing were striving to achieve...
The cases are DEUTSCH brand - Just google "DEUTSCH PCB enclosures" and you too can have injection moulded goodness with proper sealing :) (apologies if this was already mentioned)
The reason why you keep getting unreleased oscilloscopes in your dumpster is because the companies that make them know that you will pick them up at the dumpster ;)
EISA was introduced late 80s, wasn't really popular - in Desktops! In Servers it was fairly popular. For consumers the Vesa Local Bus (very long cards), was rarely used for anything else than graphics cards and IDE/SCSI Controllers. That was the Standard for 80486 boards. And it was the 486 I/O Bus on a slot. PCI came later, at the end of the 486 lifecycle, the i586 (Pentium) Boards always had PCI...
Regarding the power supply to the pi via the header, I don't know if anything has changed, but it has always been "its possible but not intended and you shouldn't do that". Also see raspberrypi.stackexchange.com/questions/1617/ for that
I am going to hazard to guess the weird solder mask colors were to look like a raspberry pi? Raspberry jam on the top, crust on the bottom? Not being very artsy I stick to green solder mask.
That Ratherboard has to be an off-the-shelf case or something made for an existing product - can't see how it could be viable to custom mould
It is it seems:
www.te.com/usa-en/product-EEC-5X650A.html
Dear Dave,
thank You very-very much for the review, and for the suggestions. Yes, USB and ethernet cables may be connected through cable glands.
I (Gergely) am happy with the pronounciation, it was really good! :)
Best regards,
Gergely
Here is the link to the TE rugged automotive enclosure that was used to house the Rather Board:
www.te.com/usa-en/product-EEC-5X650A.html
Operating Temperature Range: - 55 C to + 125 C very harsh environment protection,
16:40 thats an invisible wall. When placed and turned on, the vacuum cleaner wont go past it
Yeap, it is an automotive ecu enclosure (at least main purpose). Really familiar with these :)
Does the RPi work at 125C? (Or rather, will the box be able to sink away the heat that's generated without vent)
I built my xmass flasher drivers in these
That was me! I made the comment about the bagless mailbag segment.
Dammit, Bob!
My FAVORITE segment!
That rather board case is freaking nice.
*mailbag video even more awesome when you show an actual mailbag*
Late or not, I still very much appreciate your time to feature and take a brief look at my Protean board! I’m certainly going to try my luck again and hopefully come up with some improvements and possible changes. :D
Those automotive connectors are called Deutz connectors IIRC. They're very nice to work with, but stupidly expensive, like $50 per connector and a buck per pin.
17:34 - stuff falling on the shelf :)
Lol. Stuff reminds to Dave: "PLEASE!! OPEN ME!!! PLEASE!!".
The Rasberry Pi rugged box looks pretty much like that standard ruggedized boxes available from Tyco Electronics. They were made by a company called "Deutsch Connectors" and later acquired by Tyco AFAIK. No custom mold necessary :)
Ah, thanks, I just assumed it was fully custom.
They likely use the usb port because the pi has built-in protection when you use the usb port, while the 5v pin on the header is connected directly to the cpu and there are no pins connected to the 5v regulator.
pretty sure the soc on the rpi doesnt run off 5V so not sure what youre trying to say
"Red. Brown. This disturbs me greatly." - Best line in the video, even though I haven't finished watching yet. :)
great one, as always. thank you Dave.
The card at 35:38 is likely a video card, (CGA? With composite out?)
DHL is good in australia? When I use them, it looks like my packages were dropped from a plane, dragged for 5 miles, pissed on, then drop kicked at my door.
the truth is worse than that. I speak from experience hahaha
if that what it takes to get me unbroken things from china in 2 days... idgaf.
You mean dropping it from a moving plane isn't normal with DHL? That and they LOVE to tack on stupid fees in Canada to collect taxes. From out of country just ship mine via regular mail or air mail please.
Tempted to buy a lot of liquid ass vials(the kind you throw on the ground), and ship it DHL. That oughta teach um.
Richard Smith DHL lost my package in Germany and ended up costing me 125 bucks. Down with DHL:(
After I graduated in 1987, I worked a few weeks for the Dutch royal phone company (PTT). We checked the photographs against a query list from the mainframe. Then the modified/checked list went back to where they came from. They made the changes and the new list plus pictures came back to us and we checked everything again. I told the manager it is more easy to only make a list of the changes. The answer was "you are payed to work, not to think" :-(
The Stylistic 500 was my first home automation panel. I got a lot of them on ebay for a song. I built a special frame that provided power and serial from the attic. I replaced the HDD with a 8MB flash card running a minimal gentoo linux with basic pen services. Could control all kinds of things with it. Was a fun project. This was probably 2001/2002.
'Ratherboard' if you read this - your web page is one of the hardest to read I've come across. Everything is moving randomly including a dynamic background. Couldn't see any contact info.
Dave, I think you pronounce Gergely with a silent "L" - Gur-gay.
Dear V8Snail,
Thank you very much for the feedback! We will adjust the darkness of the background, and will provide more contact infos today. (facebook page link is already available at the bottom of the page.)
Dave's pronounciation is quite good, it is fine :)
I agree. I hate web pages like this, with animated backgrounds and things that scroll at different rates, and low contrast text. Extremely distracting from the information being presented. I've got a 100 megabit internet connection and it takes like 6 seconds to load when normal web pages load in like 0.6 seconds. And "Please Scroll Down?" Reallly? How about you show me something useful on the page when it loads. Grrrr...
Just put text in front of opaque boxes to separate it from the business going on in the background and you will be good. I am dyslexic and reading over that dynamic background makes me dizzy.
I've got to agree with V8Snail, I don't like their home page design either. I viewed it 17+ hours after V8's post so maybe it is already lowered in contrast but I still don't like it. Annoying background video, too much animation, and EXTREMELY big spacing when viewed on a PC at only 100%. Plus a whopping 16MB in size. I wouldn't be wanting to visit too often on a paid mobile connection. This seems to be the fad these days to add lots of space and make you scroll down a mile long page. Not to forget the other annoying fad of having a non scrolling bar at the top. Just because you can doesn't mean you should. If you want to design your page for "mobile" then just detect the connection and provide the big annoying sizes for it but don't make those on a PC or tablet have to view the exact same. THAT BEING SAID, it looks like a cool product and the website design wouldn't stop me from buying the product. A technical note about the graphs at the bottom of the page... recording and showing a separate graph for °C and °F annoyingly fills up the graph especially when the data points are not overlapping. Plot one line for °C and put a second legend on the right for °F if you really have to but they have to line up. At least you didn't have another line for Kelvin! :-)
I would really like to see Dave put together some demos for this. Or maybe run some CPU testing programs while monitoring how hot it gets inside while totally sealed and outdoors. It would be interesting to see more about this.
Dear V8Snail,
We have removed the background, published a user manual, and today we will launch this discount for a limited time:
facebook.com/events/1694349890582436/
Thank You for Your suggestions!!
Big big big thumbs up for the Hungarian project! Absolutely hungarian rigid quality! When hungarians do something, is done like a tank :)
Yeah, but they didn't create the "rigid quality" enclosure :)
www.te.com/usa-en/product-EEC-5X650A.html
Thank you very much!
It's seriously brilliant! I can think of so many cool uses for it
Daniel S - Kitchen Machine Shop :) This is just the enclosure. The mainboard is the big deal with buffered, protected IO ports and the whole concept. I will be a backer for this project. After when there is ethernet port :)
Sure, the board looks great. It was just that Dave assumed they also made the enclosure, and I read your comment as being about the "rigid quality" of said enclosure. Not taking anything away from the Rather Board in any way. They made a great decision when selecting this enclosure.
The processor architecture on the 48G is interesting in itself; it has 64-bit registers and a 20-bit address width but only a 4-bit interface. It has numerous arithmetic registers including a BCD exponent register which can store values up to 499.
Lmao has Dave _ever_ opened a marked, time-sensitive package in time?!
Everything that comes from Fran is gold! :D
I still have my TI85 sat here on my desk. Nearly 25 years old and still going strong. I still find the solver useful on site.
this guy and his commentary videos are addictive.
16:20 That should be a "virtual barrier", if you have a large room, you can tell the robot to clean only one side of the room, or it can be used to avoid that the robot falls off stairs
The first item uses Deutsch connectors made by TE, they are the DT series. Coincidentally that box was originally designed for GPS modules on lorries trailers, it is so big so that it can house a battery, when the haulage cpmapny forget where they left a trailer they can look it up. I would guess originally they did not need 48 pins as the box comes in 1, 2, 3 & 4 socket versions, all plugs with different keys.
37:40 At we we still have book shelves on book shelves of data books (inc. National, Burr Brown etc) ;)
If they ever get thrown out should I save them?
I did save some journals with Bob Widlar papers in them though
ratherboard...
you should add a new revision where you can screw the boards down right next to the header connectors... that doesn't seem that vibration proof
could be a killer feature for most people who need such a case
Thank You very much for the feedback! We have received it ;)
I still use my HP 48GX at work. Very fast for quick conversions and such. Nice tactile feedback making keying accurate.
That driver board.... I would've liked to fund that, looks pretty skookum and would've worked to improve one of my projects. Ah well.
Hello Hungary! I've seen all the mailbag videos, don't remember any items from Hungary...
Posting a box labelled "Time Sensitive", what could go wrong....
Just put a tiny little micro with a piezo in your package, have it periodically wake, to count out the several days in transit, then CHIRP.... CHIRP.... CHIRP.... That'll get Dave's attention!
Someone would think it's a bomb and set counter terrorists on you.
Bombs don't come in "coin cell size". It'd look, to an x-ray, like one of those musical cards. A battery, a chip, a speaker. And of course you don't have it chirp in the mail! Duh! That's what the count is for... You wait for transit to complete. It would start chirping AFTER it gets to Dave.
Yeah if someone was to make a bomb they surely would make it beep . Just in case, you know
LOL Ricardo.
9:56 A battery option maybe for a real time clock or something like that.
wheres the link to the robo van tear down ?
i tried to find it too.
its up now :-)
for the ratherboard i think they chose to power through the usb port instead of the header was so it doesn't negate the power protection circuitry built into the pi. The 5 volts on the header goes strait to the 5 volt rail, no fuse or over/under volt/current FET switches
Will it get a bit toasty inside the Rather Board box without cooling and a means for warm air to escape?
I think the volume of air inside should be sufficient. Given the level of detail in the design it would be astounding to think the designers overlooked thermals!!!
Johann Wyss Well, they seem to have overlooked powering the Pi from the header pins, instead supplying a short USB cable which when connected fouls some of the board's headers!
Dear Alex Quant,
(Somebody already had the same question on our facebook, so we will be able to give You a fast reply.)
The short answer to this question is that we did not experience overheating problems in our rooftop weather station application (www.ratherboard.com/#live_demo) during last summer (despite the fact that in Budapest 30-35°C temperature during the day is common).
The long answer is a bit more complex:
We have done a test to estimate the thermal conductivity of Ratherboard's enclosure. We have put a power resistor and an NTC temperature sensor inside the enclosure, which were connected to Ratherboard's external connector header. The power resistor was connected to a laboratory power supply. The ambient temperature was also measured.
During the first measurement the resistor dissipated 4.2W. After 65 minutes the internal temperature became constant (34°C), while the ambient temperature was 23°C. The temperature difference was 11°C and the thermal resistance was 2.63K/W.
After the first measurement we increased the voltage and the resistor dissipated 7.56W. After 60 minutes the internal temperature was constant again (42.3°C), while the ambient temperature remained at 23°C which gives a thermal resistance of 2.56K/W.
According to this measurement the thermal resistance of the enclosure is approximately 2.6K/W, which means that if you dissipate 1W inside the enclosure then the internal air temperature will be 2.6°C more than the ambient temperature.
According to www.raspberrypi.org/help/faqs/#powerReqs the Raspberry Pi 3 model B consumes 1.2A at 5V (worst case scenario with lots of external USB devices connected) , which gives 6W. Ratherboard's other components power consumption is negligible compared to this value.
If we assume that Ratherboard's switching power supply has 80% (underestimated for this calculation) efficiency, than the total dissipated power inside the enclosure is 7.5W, which means that the temperature will be 20°C more than the ambient temperature.
Let's say that the ambient temperature is 50°C because of direct sunlight, than the air temperature will be 70°C inside Ratherboard's enclosure. According to www.raspberrypi.org/help/faqs/#performanceOperatingTemperature the LAN controller is rated to maximum 70°C temperature. The chip will have higher temperature than the air around it, so in this scenario the chip will probably have higher temperature than the rated maximum value.
The above example shows that if the Raspberry Pi works very hard with many peripherals connected to it than you should consider installing heatsinks on the Raspberry Pi and installing Ratherboard in a shady area. Also note that the Raspberry Pi 3 model B typical bare-board current consumption is less than 500mA (www.raspberrypi.org/help/faqs/#powerReqs), which means only 3.2W dissipation, which only means 8.3°C temperature difference.
So the system's actual temperature performance is application dependent. For example if you have direct sunlight but lots of airflow than the heat transfer will be much better, hence the thermal resistance will be lower.
We did not experience overheating problems in our rooftop weather station application during last summer as I mentioned earlier. The CPU load was not much (below 10%) and the Ratherboard consumed approximately 0.18A at 12V, which gives 2.2W dissipation. This value is the third of the worst case value (7.5W). We have not installed heatsinks on the Raspberry Pi 3 model B. Termal behaviour has to be investigated in every electronics design, of course, a Ratherboard application is no exception.
I don't think they did overlook powering the pi via GPIO, powering it via GPIO bypasses several safety systems not limited to the fuse and BCM. I think their decision was a good one personally, Albeit clunky.
Paint it white?
yes mailbag time awesome
I am kind of amazed it can get anywhere close to its docking thing. Maybe it has a transmitter also?
I could see the Ratherboard be used for open source vehicle ECM's. Would be a cool undertaking. Maybe some generator control or such
The HP 48SX was the most popular model. It had the two expansion slots built in and you could purchase tons of application cards for the calculator including extra memory cards. I had the chemistry and electrical engineering card and a 512K memory expansion card. Still have it 27 years later! The 48G was cheaper and didn't have the extra slots that everyone wanted back then.
What about the Swiss mail bag that those catalogues came in? The ones everyone at work got? Was that this show?
Maybe light sensor inside is to determine if the case suffered severe damage due to what may happen in harsh environment.
Is the Ratherboard as tough as a Nokia?
digitalradiohacker
Nokia phones and twinkies don't forget twinkies....
"Please mark time sensitive on the outside of the bag or whatever!" ::opens box that plainly says "Time Sensitive!"::
lol, Dave, you kill me.
That was a great Mailbag, Please for the love of God do not tear down that HP Calculator. History in your hand there!
HP48G is a great calculator. Built in conversions really handy. More attached to my HP41C though.
What kind of dumpster do you use Dave?
I love my calculators but am fairly young. Just wondering if there was any forums online where I could dicuss and learn about all the cool calculators. I checked reddit and there was nothing.
ugh mailbags.. I used to have to sort mail on an island.. every two weeks we'd get a truck load of giant bags.. took hours to sort it out.
I bet that rather board used off the shelf enclosure from some kind of car module.
Leuke man dit! Zeer interessant ook!
Do I see the new EEYBlog Multimeter in the background? :p
I can't see the poll, but I vote "NO", don't destroy that HP 48G Calc. It's too nice to destroy!
(re HP) *cries* "I can't do it" --- you're a good man Dave. Keep it intact. Some day someone will send a broken one.
btw, "ja" is "yes" in Deutsch/German, pronounced a "yaah" :D
you do not have to destroy it, it is hard, but it is possible to open the hp48g with minimum damage
I speak for your entire audience... it's about time :D
Remove the rubber feet from the 48 series, unscrew whatever underneath and gently remove the back cover. There are no heat seals really.
The Epson card is a CGA graphics card. The resolution was so cruddy it could be output to a standard TV via the RCA connector(NTSC).
The Stylistic is the successor to a series of computers orignally designed by Poqet Computer Corporation as the Poqet PC. When Fujitsu bought Poqet they discontinued the Poqet PC product but used the Poqet name for a successful series of PC-based tablet computers.
Still use my HP48GX to do stuff... 20+ years and still works just fine... Cost arm and firstborn child back in day...
How they dissipate the heat from the pi. Do u image under the sun in a warm day!
my first pc was a 486dx/66! still got the cpu from it somewhere
Looks like those are Deutsch plugs on the Rather Board
www.te.com/usa-en/product-EEC-5X650A.html
They didn' connect the smps to the 5 volt pin the pi because it doens't offer protection. The usb has protection
yh but that way they didnt bypass the integrated protection and any problem that might not trigger the rather board protection will trigger the rasp protection and if it doesnt trigger the rasp protection the blame is on the rasp foundation and not the rather board
Dear Carlos Almeida,
Yes, our goal was to use both of the protection possibilities. (Ratherboard's protection and the RPi's also.)
Still think it would be better to have the option to power it from the GPIO , that micro USB is not that rugged and it would also allow for fast swap out of the Pi, swapo the sd and BOOm your done , push it back on the headers.
The Pi is so cheap you could consider it expendable, ease of service and speed of service are the most important i think, at least for this application.
Dear Andrew Joy,
Tank You for Your feedback! We will consider Your opinion in the future!
Yeah, make it a jumper on the rather board.
I still miss my 48SX.
Still using the 48S. Only S but Manual is twice as thick! :-)
This is the best marketing strategy I could think of, sending a prototype to a worldwide known channel during their indiegogo campaign, genious!
Btw, this stuff looks good :3
wait are compE's allowed to watch this?
I still use a 48GX... I had a 48G when I started, and eventually went to a 49, but it was stolen. I also have an emulator for this calculator on my phone.
I'll send you my hacked 48G (has been opened) and (fairly poorly) modded to double the storage.
Are you actually finding these unreleased scopes in the dumpster or is this just a running joke?
Please don't destroy the calculator!
The Epson 8-bit ISA card is a MGA Q205A. Monochrome Graphics Adapter. And can be used as a MGA/CGA.
yep
I had the HP 48GX.
Were there more mod wires than traces 8-P
You got an epic dumpster
Still use my 48SX daily... can't use a "normal" calculator anymore.
com on i wanna see that sigilent scope !
I thought I knew of most of the Windows variants, but I've never heard of Windows for pen computing 1.0. I'm guessing that product line didn't last much past version 1.0.
Darren Jacobson I think Windows for Pen 1.0 was the pen computing extension for Win 3.1x . Microsoft got themselves some patents for how they converted pen touches into mouse actions. Later they used those patents (and some Windows Mobile / CE patents) to sue Android smartphone makers for royalties.
I have watched all the mail bags before and he has showed that bag before
Mod wire?
Don't murder the HP 48G, please.
Hi, bowie knife man...you're looking sharp today...😁👍🏻
wow I still have the same copy of that Philips catalogue.. shame
I would've been rubbing the surface of the rpi controller thing. Then say, "I am feeling rather board."
That Stylistic device has a cataract on the LCD. The layers have delaminated. Easy fix. Just heat and separate, replace what needs removed and relaminate.
damn I bet that raspberry pi has some serious current driving capability
17:34 Probably you meant "Moon-sh-hen" (Munich)
I had a 486 DX4-100 on a EISA along with a EISA gfx...used mainly to play Duke3D...;)
there is a store in Sydney, Australia which is named David Jones
coincidence?????
Mr. Katti Are you sure it's not his office or home labeled as a store on some map?
The plugs are a high end automotive plug. called a deutsch plug very high quality requiring a propitiatory tool to crimp them.
My pliers worked just fine!
deutsch plug you say? ze germans - always high quality and very proprietary
That would have got me shot or at very least fired. I had a job setting up and installing GPS tracking and location services, security systems, lighting and other electronic services / devices into blast trucks for the mining sector. They were vehicles which would transport and set the "prill" (ANFO explosives) and their detonators. Naturally there had to be redundancies for everything. These connectors were chosen for there seal-ability and their insulation properties etc. Excellent connectors and it shows the level of quality and ruggedness the designers of the raspberry pie boredom thing were striving to achieve...
The cases are DEUTSCH brand - Just google "DEUTSCH PCB enclosures" and you too can have injection moulded goodness with proper sealing :) (apologies if this was already mentioned)
The reason why you keep getting unreleased oscilloscopes in your dumpster is because the companies that make them know that you will pick them up at the dumpster ;)
The epson btw. is a kind of hybrid between cga and hercules monochrome graphics card.
EISA was introduced late 80s, wasn't really popular - in Desktops! In Servers it was fairly popular.
For consumers the Vesa Local Bus (very long cards), was rarely used for anything else than graphics cards and IDE/SCSI Controllers. That was the Standard for 80486 boards. And it was the 486 I/O Bus on a slot.
PCI came later, at the end of the 486 lifecycle, the i586 (Pentium) Boards always had PCI...
A 486 dx2 cpu without a hot sink rare. That tablet are very high temperature inside.
Regarding the power supply to the pi via the header, I don't know if anything has changed, but it has always been "its possible but not intended and you shouldn't do that". Also see raspberrypi.stackexchange.com/questions/1617/ for that
dont destroy the hp calc.
"This disturbs me greatly" going to use that a lot, I know it.
I am going to hazard to guess the weird solder mask colors were to look like a raspberry pi? Raspberry jam on the top, crust on the bottom?
Not being very artsy I stick to green solder mask.
White looks pretty nice, as well as the black used by Apple, that looks very nice! I really have no idea why they used two different solder masks?