This credit card sized PCB can SAVE YOUR LIFE! (Shrinkify your projects with a 4 Layer PCB)



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Get my PCB design & Name Card Gerber: https://bit.ly/3tNjXji
Previous video: https://youtu.be/XlON0Uj2Zk0
Box project video: https://youtu.be/0P4R91hsMf0

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More project information (code, schematic, pictures,….) on Instructables & EasyEDA: https://www.instructables.com/A-Box-That-Can-SAVE-YOUR-LIFEand-Get-You-Out-of-Aw/
https://oshwlab.com/GreatScott/smscallgpsthingy

Parts list (affiliate links):
Aliexpress:
1x Arduino Pro Mini: https://s.click.aliexpress.com/e/_APsmG8
1x A6 GSM Module: https://s.click.aliexpress.com/e/_98ih6y
1x NEO-6M GPS Module: https://s.click.aliexpress.com/e/_A5Pys4
2x Slide Switch: https://s.click.aliexpress.com/e/_99gyF2
1x Tactile Push Button: https://s.click.aliexpress.com/e/_A3GIVQ
1x TP4056: https://s.click.aliexpress.com/e/_dX8n0hp
1x LiPo Battery: https://s.click.aliexpress.com/e/_996Mx2
Amazon.com:
1x Arduino Pro Mini: https://amzn.to/3D0YFiM
1x A6 GSM Module: https://amzn.to/3D1bdXN
1x NEO-6M GPS Module: https://amzn.to/3D2hpyB
2x Slide Switch: https://amzn.to/3DZRpVO
1x Tactile Push Button: https://amzn.to/3FThzdn
1x TP4056: https://amzn.to/32FcNC6
1x LiPo Battery: https://amzn.to/3refAfN

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:
https://www.electrodragon.com/w/GSM_GPRS_A6_Module
https://www.smart-prototyping.com/image/data/9_Modules/101756%20Wireless%20A6C/A6_A7_A6C_datasheet-EN.pdf
https://www.makerfabs.com/wiki/images/9/90/Maduino_GPRS_A6_v1.5.pdf
https://www.electroschematics.com/neo-6m-gps-module/
http://wiki.sunfounder.cc/index.php?title=Ublox_NEO-6M_GPS_Module

Thanks to JLCPCB for sponsoring this video.
Visit https://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

source

46 thoughts on “This credit card sized PCB can SAVE YOUR LIFE! (Shrinkify your projects with a 4 Layer PCB)

  • January 23, 2022 at 6:35 pm
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    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.

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  • January 23, 2022 at 6:35 pm
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    I was precisely thinking in make one of these for my grandma, she can’t walk but absolutely refuses to leave her home, so Ill make a panic button so family nearby can go help her in case of any accidents

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  • January 23, 2022 at 6:35 pm
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    Excellent reduction of prototype to product but I'd ditch the Arduino too and desolder the ATmega off the board and use that with a crystal, capacitors and a header for programming. Also with 4 layers you could mount on both sides of the board using a layer as an internal ground plane and reduce the size even further with little extra work. Maybe it could be an ongoing project to see just how small you can get it.

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  • January 23, 2022 at 6:35 pm
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    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!

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  • January 23, 2022 at 6:35 pm
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    Der Vibe vom neuen Intro is echt gelungen gefällt mir sehr. Das Projekt ist auch wirklich gelungen

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  • January 23, 2022 at 6:35 pm
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    what is this 1950's tech go home noob

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  • January 23, 2022 at 6:35 pm
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    Maaaan that's such a great example of multi-layered PCBs! Gotta love the enthusiasm of the outro.

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  • January 23, 2022 at 6:35 pm
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    Wouldn't it be even cleaner by replacing the Arduino with the ATMega328 alone? IIRC, there's a lot of stuff on the Arduino that is not really relevant for a "finished" circuit. Actually, I think you would cut the footprint of the Arduino by half for a Mini, and nearly two thirds for a Nano, that may be not so negligible…

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  • January 23, 2022 at 6:35 pm
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    Hello. Can you do a take on how get started with the emulator software, why you chose the one you're using, and with a step by step demo of designing a simple circuit, converting to PCB schematic, ordering a pcb? It would be greatly appreciated! Thank you in advance!

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  • January 23, 2022 at 6:35 pm
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    Why not just use one button and use a power latch?
    The button itself can be used to connect the supply EN pin and also to your MCU input pin.
    Now that your MCU has started up, drive the supply EN pin with one of your MCU's outputs.
    Once everything is done, your MCU can shut everything down by itself.
    You can use a diode to prevent your output pin rising your button input pin.
    Mode switch can be implemented like this: tap for call, hold for SMS or something along those lines.

    Reply
  • January 23, 2022 at 6:35 pm
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    I hope your future projects also will use 4 layer PCBs since they can be made smaller and more complex in functionality

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  • January 23, 2022 at 6:35 pm
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    I’m workin on two boards that have required me to go to 4 layers, but auto-route with larger traces doesn’t work so well.

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  • January 23, 2022 at 6:35 pm
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    Simple ATmega328p chip with bunch of passive components would be much smaller than whole Arduino.

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  • January 23, 2022 at 6:35 pm
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    Great video but jlc pcb service in my country are so rubbiah i ordered my pcb 3 monts ago sti didnt recive my order

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  • January 23, 2022 at 6:35 pm
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    The look of the solder joints suggests that you was using a lead free solder paste. Is it a legal requirement in Germany even for private use and prototyping?

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  • January 23, 2022 at 6:35 pm
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    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 (:

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  • January 23, 2022 at 6:35 pm
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    Won't it be a better choice to use just the Atmega 328P rather than using the whole pro mini board?( Given that you are already using SMD components) It'd have made the whole assembly a bit smaller, and the final result would have looked more professional.
    Great project as always ….

    Reply
  • January 23, 2022 at 6:35 pm
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    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 🙂

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  • January 23, 2022 at 6:35 pm
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    I would like to see this in cars for the elderly so they could hit a button and someone could be notified.

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  • January 23, 2022 at 6:35 pm
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    OK, awesome. Now make a more useful one. 🙂
    Two suggestions:
    A motorcycle tracker that cries for help if the rider doesn’t silence/acknowledge an alarm within 15 minutes of it regularly going off. You know: SMS, email, etc with GPS coordinates and an eventual call to emergency services with a pre-recorded message + last known coordinates.
    A camera that emails or sends MMS thumbnails when it detects motion as well as providing a live view when you request it remotely.

    The later would preferably be activated as a backup when there is a network or power interruption to your non-GSM cloud-connected cameras (Nest, Ring, etc) or when you specifically need it… like you position outside with no power source to capture a trespasser, for example.

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  • January 23, 2022 at 6:35 pm
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    You sould use the AI-Thinker A7 module which contains both GSM and GPS feature and let you save so much more space on you pcb !

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  • January 23, 2022 at 6:35 pm
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    I hope you don’t accidentally emergency butt dial yourself carrying that round in your back pocket….

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  • January 23, 2022 at 6:35 pm
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    Great idea and very well implemented. What's the name/source of that fancy magnifying camera thing on your bench at 1:06? I could use one of those!

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  • January 23, 2022 at 6:35 pm
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    A6 Sim is sadly only 2G. Here they are phasing out 2G and 3G. 4G boards like the SIM7600 are way more expensive and more complex.

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  • January 23, 2022 at 6:35 pm
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    You could have cut your cost in half by doing this 2 layer there was no reason you needed 4… lol

    Reply

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