Hej Anders! I built my own UV box some years ago, I used one of the cheap aluminum suitcases you can get from Harald Nyborg and made it so it has to be closed for the lights to engage. Super cool content, as always!
@@AndersNielsenAA Got them off eBay, I paid about 25-30 EUR for two E27 bulbs. This was approximately 11 years ago, so I’m not sure about the stock and pricing nowadays. Unfortunately I don’t have it with me to give you a more specific reference. In my case, they didn’t have the exact wavelength I needed but close enough, so it was a matter of a little longer exposure (I used them for UV-cured coatings)
I will go buy the eraser. I went the tube route and is a pain, it takes forever to erase (I think they not exactly the same wavelength and you do need some type of enclosure to focus the light, I got the tubes and used an empty drawer as an enclosure and it took me plenty of tries and around 40 minutes total and from the 3 roms only 1 was fully erased the other 2 had a few bits still set
Thanks for sharing your experience. Not a bad idea about the drawer - I guess they really need to be right on top. Photonic energy diminishes squared with distance - like radio. I kinda want to do the hacky thing - but I certainly prefer a reliable 10 min erasure to a one hour unrealiable one. I guess there's also a risk of overcooking them.
@@AndersNielsenAA you have a point there mine was a bit of a hack and not a perfect setup and the tube was not exactly 90 degrees to the chips. I should give it another try with the light setup right.
when I was tinkering with EPROMs I used an old mercury-vapor lamp from a street light. they were converting to natrium lamps and had plenty of them. I drilled a hole in the glass with a diamond bit and it erased the chips in just seconds .. well the lamp took about 10 minutes to warm up though .. and it looked like aliens had just landed b/c it was soooo bright :D
@@AndersNielsenAA I think it was more like 100 watt(?) .. the ballast I used was 80 watt - so it got fairly hot. The lamp has an inner quarz bulb and an outer glass bulb that is coated with phosphor to convert the UV to visible light. Most people just smashed the outer glass - but I was too afraid of the high voltage bare wires inside
I am reading your i2c code at the moment wondering what I will need to do to make it work with Bens BreadBoard computer which I am still building. I like how consoles stored routines in there roms so a program could just call it. What a great idea. I wonder if its possible to store some routines in ROM and only blank a bit of the EEPROM for the new code rather than erasing the entire EEPROM?
As long as you put scl and sda on bit 0 & 1 on any port you should be fine. Sure, it's possible to leave some blank space in ROM - but you probably need to copy the routine to write to it to RAM. I plan to make the 65uino in system programmable for at least SST39's and AT28 ROMs.
@@AndersNielsenAAI have 3 at28c256 chips and I just use minpro -p at28c256 and -w file and it works great, and that is the new T48 with Linux. You talk about copying code from EEPROM to ram.I noticed his blink example which you wrie to EEPROM. does not seem to use any RAM as his computer does not have any yet. Later on when writes code for the LCD it doesn;t work as he has no stack. The RIOT chip you have is nice as you get 128 bytes of RAM with it. I am amazed what you can do with it.
@@AndersNielsenAAI have a simple logic analyzer, It might be useful to see what is going on. A nice DSO would be great, but we got to start somewhere. It is interesting you will make it so you and program the EEPROM via serial, that will be interesting.
@@AndersNielsenAA for example the "2-in-1 Sterilizer" from Maginon (Aldi) had 2 gas discharge tubes in it. I havent tryed to erase an EPROM in it - but it smells strongly like ozon so I think it would work.
Hope you all like the video 😊 Come join the active community on Discord - link in the description ☝️👾💾
Hej Anders! I built my own UV box some years ago, I used one of the cheap aluminum suitcases you can get from Harald Nyborg and made it so it has to be closed for the lights to engage. Super cool content, as always!
Sejt! Where'd you get the lamps?
@@AndersNielsenAA
Got them off eBay, I paid about 25-30 EUR for two E27 bulbs. This was approximately 11 years ago, so I’m not sure about the stock and pricing nowadays. Unfortunately I don’t have it with me to give you a more specific reference. In my case, they didn’t have the exact wavelength I needed but close enough, so it was a matter of a little longer exposure (I used them for UV-cured coatings)
I will go buy the eraser. I went the tube route and is a pain, it takes forever to erase (I think they not exactly the same wavelength and you do need some type of enclosure to focus the light,
I got the tubes and used an empty drawer as an enclosure and it took me plenty of tries and around 40 minutes total and from the 3 roms only 1 was fully erased the other 2 had a few bits still set
Thanks for sharing your experience. Not a bad idea about the drawer - I guess they really need to be right on top. Photonic energy diminishes squared with distance - like radio.
I kinda want to do the hacky thing - but I certainly prefer a reliable 10 min erasure to a one hour unrealiable one. I guess there's also a risk of overcooking them.
@@AndersNielsenAA you have a point there mine was a bit of a hack and not a perfect setup and the tube was not exactly 90 degrees to the chips. I should give it another try with the light setup right.
Oooo new video
Nice!
when I was tinkering with EPROMs I used an old mercury-vapor lamp from a street light. they were converting to natrium lamps and had plenty of them. I drilled a hole in the glass with a diamond bit and it erased the chips in just seconds .. well the lamp took about 10 minutes to warm up though .. and it looked like aliens had just landed b/c it was soooo bright :D
You mean like a... 175 WATT lamp? :D But.. drilling a hole in the glass? Isn't it a vacuum bulb?🤔
@@AndersNielsenAA I think it was more like 100 watt(?) .. the ballast I used was 80 watt - so it got fairly hot. The lamp has an inner quarz bulb and an outer glass bulb that is coated with phosphor to convert the UV to visible light. Most people just smashed the outer glass - but I was too afraid of the high voltage bare wires inside
I’d be too scared to smash all the way to the mercury and inhaling it :)
Nice a new video. If you can find a nice at28c eeprom it will be a lot easier :)
AT28's have write protection - so at this point they're actually harder to handle than W27C512.
Soon there's nothing this can't handle :D
I am reading your i2c code at the moment wondering what I will need to do to make it work with Bens BreadBoard computer which I am still building. I like how consoles stored routines in there roms so a program could just call it. What a great idea. I wonder if its possible to store some routines in ROM and only blank a bit of the EEPROM for the new code rather than erasing the entire EEPROM?
As long as you put scl and sda on bit 0 & 1 on any port you should be fine.
Sure, it's possible to leave some blank space in ROM - but you probably need to copy the routine to write to it to RAM. I plan to make the 65uino in system programmable for at least SST39's and AT28 ROMs.
@@AndersNielsenAAI have 3 at28c256 chips and I just use minpro -p at28c256 and -w file and it works great, and that is the new T48 with Linux. You talk about copying code from EEPROM to ram.I noticed his blink example which you wrie to EEPROM. does not seem to use any RAM as his computer does not have any yet. Later on when writes code for the LCD it doesn;t work as he has no stack. The RIOT chip you have is nice as you get 128 bytes of RAM with it. I am amazed what you can do with it.
@@AndersNielsenAAI have a simple logic analyzer, It might be useful to see what is going on. A nice DSO would be great, but we got to start somewhere. It is interesting you will make it so you and program the EEPROM via serial, that will be interesting.
what about a cheap smart phone sterilizer?
I'd like to try one but I imagine the UV led's don't put out enough energy - at the price just maybe worth a try.
@@AndersNielsenAA for example the "2-in-1 Sterilizer" from Maginon (Aldi) had 2 gas discharge tubes in it. I havent tryed to erase an EPROM in it - but it smells strongly like ozon so I think it would work.