This credit card sized PCB can SAVE YOUR LIFE! (Shrinkify your projects with a 4 Layer PCB)
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- เผยแพร่เมื่อ 12 พ.ค. 2024
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1x NEO-6M GPS Module: amzn.to/3D2hpyB
2x Slide Switch: amzn.to/3DZRpVO
1x Tactile Push Button: amzn.to/3FThzdn
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In this video I will show you how I turned a big and clunky electronics project into a rather small form factor that can easily be carried around. The project itself can call your phone and send an SMS with GPS information. The new credit card sized PCB version can do all of that while being way smaller. The reason is a 4 Layer PCB design which I will tell you all about during the video and how you can make your own. Let's get started!
Useful websites which were shown/mentioned in the video:
www.electrodragon.com/w/GSM_G...
www.smart-prototyping.com/ima...
www.makerfabs.com/wiki/images...
www.electroschematics.com/neo...
wiki.sunfounder.cc/index.php?t...
Thanks to JLCPCB for sponsoring this video.
Visit jlcpcb.com to get professional PCBs for low prices.
0:00 My old project is TOO BIG!
1:26 Intro
2:08 Component sourcing
3:16 Creating the schematic
4:25 4 Layer PCB design
6:48 Soldering the PCBs
7:55 First test & troubleshooting
9:08 Final Test & verdict - วิทยาศาสตร์และเทคโนโลยี
I think this board could be possible on 2 layers. Use old laying technique: vertical traces on one layer, horizontal on another. You can fill empty space with GND and apply via stitching.
2 Layers is possible. I tried it. But I thought it was time to talk about 4 layers ;-)
I never knew about that technique
@@YSPACElabs Very useful when you have a lack of space, just be careful when you have high current traces or AC. Parallel lines can easily act as antenna's.
@@YSPACElabs often used on old computer designs with a lot of discrete parts, I still use it occasionally when I do my boards
Yeah but then you can't get that sweet sweet jlcbcb money
I enjoy the fact that you like to revisit old projects. Showing that even the very experienced go through varying versions of a project.
Also, that you like to share your troubleshooting. That, in and if itself, is super useful.
Thanks!
Thanks for the feedback :-)
The 328p is quite easy to use on it's own and saves a lot of space not having a whole arduino. I've made projects using a 328p that ended up smaller than a nano.
Basically just a single pullup resistor if ur fine with the 8mhz internal oscillator. Otherwise +2 caps and a crystal
@@KekTekDe And an ICSP header or pads. They're a very useful MC
or we can ditch the venerable 328p and use a RP2040 :) (although if space is an issue, the bare 328p with internal 8mhz is hard to beat)
@@AudreyRobinel well, for this project an attiny would be sufficient 😄
@@KekTekDe Well, it may be suffiscient, but modern micros are as power efficient, and as cheap, providing with greater flexibility, and easier code maintenance :) why pay the same price for a lesser technology? 328p are not significantly cheaper than rp2040s and they are outclassed on most, if not all metrics!
Interesting project. Great work. This year I had to design a six layer PCB at work and it was a daunting task at first but ended up enjoying it.
I think once you get into designing it becomes like solving a maze. And I think that is quite fun and challenging at the same time ;-)
@@greatscottlab Yeah it can be very fun trying to fit all the parts and make the layout as efficient as possible.
@@akhurash How is this comment 6 days ago :d
@@bkaytan patreon get early access
@@greatscottlab very true until you use........................... the AUTO ROUTER haha. on any design with some complexity it requires a lot of hand holding to get the auto router to do its job.
Great video. You could have desoldered atmega chip from Arduino board as well, as you could get even smaller circuit. Arduino is anyway mostly atmega plus usb-to-serial chip and oscillator which can both be avoided in some cases.
True, and the pro-mini doesn't even have the usb-serial chip
I was always thinking what are those small holes in the PCB's. And now i know it. Thanks for answering my question.
Glad I could help!
Create a raised ring around the button so you don't inadvertently press it when sitting down or leaning against something.
there's an on/off switch independent of the button
@@Astarath It's still a good idea to protect the button, just as it's a good idea to protect the slide switch.
Keep in mind that RF traces (like the one going from the GPS to the antenna) need special care and should be kept straight and some other things like the length need to be precise.
Yeah. It's a miracle that it even works. It needs to be short and FAT. GSM is another thing, it usually works with a wet string, but it might be noisy as hell. GPS on the other hand is really easy to screw up.
shouldn't they be controlled impedance traces? 50R?
Not if you are using active antenna. It seems he is using a active antenna, which is fed with a small bit of power, meaning the conductor between antenna circuit and GPS circuit isn't critical, but the conductor between antenna circuit and the actual antenna is critical. The antenna circuit is on the board where the antenna is mounted. An active antenna is ALWAYS required when connecting a GPS to any length of antenna cable, since when using passive antennas, you get reflections and such in cables that can disturb the sensitive GPS signal.
@@sebastiannielsen you also get impedance mismatch and reflections with a LNA. No way around that.
@@zaprodk Yeah but then with the amplified signal back, the SNR will be higher, meaning it doesn't matter if you get some crap on the line.
This is just beautiful.
Going back to redo old projects and make them even better is such a cool way to go about DIY
As someone with social anxiety, this is a godsent project.
Great tutorial as always! Since 2G networks are almost all shutdown in the US, it would be awesome if you did a similar project with a LTE module such as the SIM7000 as it also has built-in GPS.
Loved this video because you covered some good points and challenges of designing a pcb! You should do more like these!
Going through data sheets and pairing up components is hard but so satisfying when it works.
The activation button should be recessed to reduce accidental triggering from clothing. You don't want to be butt dialing. Also I would consider requiring 2 buttons that have to pressed at the same time.
I thought the same, and perhaps recessed dip switches as well. I bet the enclosure could be made half as thick.
I believe there are 2 buttons, the switch must be activated for the button to work.
don't kink shame people randy, maybe I do want butt dialling!
Here is a very good project.
I even see an evolution;
Imagine an elder working in his garage and unfortunately he falls and has trouble getting up.
With some modification your system could send an sms to a list of people selected in "help me" mode
I like the new intro reel more than the old one. It is perfect amount of length.
I love your videos. I just ordered my first PCBs for a project about a week ago. I will definitely be designing boards for future circuits.
Now you can keep track of every chair you sit on. Great project!
Very cool...never thought of using a 4 layer board w/ the gnd and vcc planes like you did...that will DEFINITELY make things easier to route!
Keep em coming!!!!
There’s still a lot of wasted space, though, almost half is taken by the Arduino, the switches and the button. By using an SMD microcontroller directly on the board, an SMD button and switches (or removing one or the two switches) and a dual GSM+GPS module, it probably could be shrunk to half the size or less.
Maybe he can make a version 3 for us
@@whizzbang7520 I'm kind of trying to minimalize the design right now with a fork of that project. Fixed the mess in the schematic, put all in blocks so it's readable and debuggable. Get the routing done without the godawful autorouter traces. Also wanted to find an enclosure that one could buy already done from a manufacturer, that would be small and easily modifiable and they have CAD stuff, so people with 3D printers can waste their plastic too if they choose. The Ai thinker A9 has GPS and GPRS so could use that later, but for now, because this project also has the code for all the stuff here, I would not try to change much but just the PCB.
@grbttutorials Please post a video of making this project even smaller
@@deskpro256 can you link the release when its done?
Awesome channel what really draws me in is you buy products then build the same product then give us all the results good or bad ..keep it up ..as a mechanic with an electrical engineering certificate I really learn a LOT from you and can see a LOT of places in vehicles where Arduino can fix issues like factory problems or after market modifying or discontinued ancient stuff like 1980s Mazda's I own ...
Maaaan that's such a great example of multi-layered PCBs! Gotta love the enthusiasm of the outro.
I once worked making software to a company that could make PCB boards with more than 20 layers. Never found out what special applications those insane boards were for, but it was quite impressing. I heard that the amount of rejects was quite high with those PCBs with all the blind holes and holes between layers deep inside etc.
wouldn't be surprised if smartphones and pc/laptop mainboards are about there.
@@victortitov1740 No. Smartphones and pc/laptops will propably in the future go to a common bus architecture, meaning they could be done on 3 or 4 layer boards. Today we still have HDMI ports and such on laptops, which require its own circuity, but in the future the whole laptop/smartphone might just consist of a single USB-C bus + power + gnd going around every component including storage and processor. And with the new RAM types that can nonvolatively store data, I think we in the future will use our RAM sticks as harddrive.
Delivered exactly like I asked for, thank you for the video and the hard work!
Nice to see someone using 4 layer pcb :)
Glad you like it!
Very nice video as well as PCB design! We love it and we're glad that you're happy with our service! 🥰
Hey scott! I love that you revisited your old video and solved the problems. And just asking, can you start a series of arduino programming which you discontinued years ago? Because I love your videos and you are a great teacher too! Hope you will start the series...
How I haven’t seen this awesome channel before is beyond me. Definitely subscribed
Wow! You made this look so easy. It inspires me to try something like this as I too have a similar wireless project in mind. I also have never done anything like this before so there will be so much to learn.
This is amazing. I've been looking for something like this for a few months. Just my big doggo and I these days and it kinda scares me as I get older. Thank you for sharing this.
Great video! I think my next PCB also will be 4 layers, as JLCPCB really has made it affordable enough now. I am not sure if I liked the close up at 10:04 though. Loose solder balls or flux residue, I am not sure what that was, but if I see things like that in my own projects I usually flux and run the iron over that another time and clean up before I call it 100% finished.
Wow. The circuit is beautiful and complicated at the same time. Really amazing work.
Thanks a lot!
I had been working on making a diy 2 layer pcb and now scott post a video- awesome!
Hope you enjoy it!
It's a very useful project !! Every senior who lives independently should use one of these, and even people who live alone and can be robbed are an important solution !!
Thanks :-)
Love your projects.
Fantastic work, dude! Nicely done! 😃
This project was great, but it's even better now!
Anyway, stay safe and creative there! 🖖😊
🔥 content #GreatScott keep doing your thing
Nice, this project now is 4 boards shorter than first version! 😉 Now it's more practical..
Great video, as always! 👍
Nice job! Thanks for sharing.
Thank you for the amazing videos! very useful and informative while still being fun to watch
I am new to pcb and I learned a lot thanks
So much to unpack. Great video. Thanks!
Impressive stuff sir! Seriously!
Excellent pro job! Congratulations GreatScott! Also the smile DAMNED 01:23. Now you could waterproof the box because there are plenty of floods in Germany! the box can prove useful for survivors.
Engineer before work: clean and tidy
after work: messy af
Very nice video. You don't always have to come up with fancy stuff, so how to design a pcb even though with 4 layers is very condense. Keep up with the great work!
Ps: always fascinated how easy your debugging looks like :D. I feel like I need days until I find the error
Really nice work!
Cool board! Although I'd suggest swapping out the GSM module for something lower power though. I bet this thing eats through the battery charge like crazy.
There are plenty of LTE modules out there that are cheaper and lower power, and oftentimes have integrated GNSS receivers. Plus, with 2G network shutdowns happening globally, this could stop working in parts of the world.
Nice concept though!
Truly awesome
I run a hardware business and the chip shortage has certainly changed the game quite a bit. We've had to build up a bunch of chip inventory management and ordering processes to ensure we get what we need, along with accelerating board redesigns.
Chip gougers like Win Source are a blessing and a curse. They purchase chips and markup by nearly 10 times, but at least it means you can get your hands on chips for prototypes.
Have you ever bought from Win Source? Hard to tell which ones are scammers or not.
Your brave. Good work
I’m loving the new intro!
This is the first time I saw great Scott on video. Mashallah a good looking man.! May God guide you always.
wonderful, keep going😄👏👏
Very cool project!
Very interesting video, I have always thought it would be impossible to make a 4-layer PCB with my experience (almost none) but it just took time and in some cases it was easy. Thank you for your informative content (:
The usual practice is to make the interior planes on a 4-layer board the power and ground and run all the circuit traces on the outside planes. This means pesky blind vias for everything that needs a power supply, but you're going to get them anyway and this probably produces the fewest in most designs. With that in mind, designing a 4-layer board is probably going to be easier than a 2-layer board, if you've done a few 2-layer boards.
Loved the video. Great Job! And you had not even ONE dislike :)
Love the new intro!
Nice job!
I think rounded corners all around the outside of the box would make it better to carry even in a bag or backpack, not to mention pocket.
Good job, I like the way that you working
Glad you like it
Lot's of good information. Way to go!
About the Auto-route, for me, it's ALL about attention. Check, re-check, three-check the connections, especially the data lines, and you usually save a lot of time on medium/big-sized boards.
Well said!
Great video! Looks super cool compared to previous bulky version. Going to make it. 👍👍
Have fun!
That was awesome 😀
Thanks for the video
Nice work! I like this project
Thanks!
Your project are very interesting and I want to be a student of you...Scott sir
Like most of your videos. Great Scott
"4 layer" I'm still at single layer home etched... Man I need to catch up to the rest of you 🍻
You will get there ;-)
For such a project I would be worried about radio or other interference among the components because I don’t know about such things but do know it can occur. It’s awesome that it worked!
Yep :-)
If you move the switch and buttons to one side, then you could make the whole PCB slimmer which would be more comfortable in your pocket and then could be inserted into a pocket of a purse or handbag. This board could also be used as a GPS tracker enabling you to find the unit simply by sending a SMS with a code in it, which triggers the GPS result in a returning SMS.
Another awesome video from great scott 😍
Glad you enjoyed it
Oh my god, what a wonderful video, i respect your effort.. thank you
Glad you liked it!
Cool project the chip shortage sucks but you harvested what you needed.
Genius!
Awesome
♥
I cannot wait when you gonna use the 6-layer PCB. Great video as usual :D
Maybe in the future ;-)
you are a genius
i am really excited to see the new studio wiring video with german standerts and hager stuff!!
That will take a while though.....
Brilliant
only on a nerd-channel we are talking about the details in depth of a box that gets you out of a conversion, instead of improving social skills xD
very well done as usual
It might be useful to have a safety switch to save from the inconvenience of but dialing as the button is quite noticeable in pocket, great idea either way.
Great 👍Scott !!!!
With two-layer boards I make one side GND and the other VCC after the signal lines. This even makes a small capacitor.
Nice video, like it, thanks for sharing :)
Maybe a community tab upload, but I would love to see a photo of a side-by-side comparison of the old enclosure vs new one for scale :)
I was waiting for u💗💗💗💗
Is there a reason you are using Pro mini but Atmega328 itself? I have seen so many of your videos and I always wonder that. With a atmega chip with a resinator could save a HUGE space for the PCB
And you can also flash the Atmega with the arduino compiled hex file via ISP. Would be a big space improvement.
@@r3tr0_ yep. May be he can manage to fit 2 layers with a smaller PCB. Programming pin is not even necessary if the code uploaded beforehand
@@thenextproblem8001 I would still put an ISP header on the board for later updates. You don't want to desolder the chip every time for programming. Plus a 1.25mm ISP header is really small.
@@ProTekkit1 im just placing some copper pads on top layer and hold the FTDI board on it. No desoldering no problem
@@thenextproblem8001 you can even 3d print a pogo pin holder that you just clip to the pcb so you don't have to hold the programmer.
Nice project
Thank you! Cheers!
Der Vibe vom neuen Intro is echt gelungen gefällt mir sehr. Das Projekt ist auch wirklich gelungen
Danke :-)
It is very useful and is certainly marketable especially if it were smaller and more inconspicuous.
Genial video, siempre los veo todo un pro gracias
the new intro is awesome!
Thanks :-)
As a newb just learning about the metal stencils I'd like to share with you more experienced guys how freaking cool that is.
I had a simmilar idea since last summer, but the plan was to stick with sandwitching pcb's together.I picked the sm800l as my GSM , and its a chip that is hard to solder, also the RF wiring seemed hard. It was more like a remote tracker. Unfortunatly it stayed in the early design stage. Mayby your desing will help complete it.
Great one.
I like the new video intro!
Awesome ✌🏻✌🏻✌🏻
Also great gadget for safety purpose 👍🏻👍🏻👍🏻
Definitely
@@greatscottlab Keep it up 🙏🏻🙏🏻🙏🏻
Turning this project into a watch or a keychain would be an excellent next step. Even better might be a mode you can set it to to send gps co-ordinates to someone on an interval until the battery dies.
Hi Scott, great video as always!! It’s good to see you getting into the more esoteric stuff like 4 layer PCBs!! I have one quick question though. I recently bought myself a hot air rework station but am having trouble finding optimum settings for it. Yours looks like it works a treat, what temp/airflow settings do you use? Thank you and keep up the good work!!
350C with a flow rate of around 3-5
yes lower your airflow,. had that same problem in the past lol
You should definitely make this a full product you can sell !!
Un buen sistema de emergencias, un saludo amigo.