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

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Parts list (affiliate links):
Aliexpress:
1x Arduino Pro Mini: s.click.aliexpress.com/e/_APsmG8
1x A6 GSM Module: s.click.aliexpress.com/e/_98ih6y
1x NEO-6M GPS Module: s.click.aliexpress.com/e/_A5Pys4
2x Slide Switch: s.click.aliexpress.com/e/_99gyF2
1x Tactile Push Button: s.click.aliexpress.com/e/_A3GIVQ
1x TP4056: s.click.aliexpress.com/e/_dX8...
1x LiPo Battery: s.click.aliexpress.com/e/_996Mx2
Amazon.com:
1x Arduino Pro Mini: amzn.to/3D0YFiM
1x A6 GSM Module: amzn.to/3D1bdXN
1x NEO-6M GPS Module: amzn.to/3D2hpyB
2x Slide Switch: amzn.to/3DZRpVO
1x Tactile Push Button: amzn.to/3FThzdn
1x TP4056: amzn.to/32FcNC6
1x LiPo Battery: 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:
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

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1 авг 2024

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Комментарии : 609

@HorochovPL 2 года назад

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.

@greatscottlab 2 года назад

2 Layers is possible. I tried it. But I thought it was time to talk about 4 layers ;-)

@YSPACElabs 2 года назад

I never knew about that technique

@keukenrol 2 года назад

@@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.

@williefleete 2 года назад

@@YSPACElabs often used on old computer designs with a lot of discrete parts, I still use it occasionally when I do my boards

@u.h6844 2 года назад

Yeah but then you can't get that sweet sweet jlcbcb money

@mylesswanson 2 года назад

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!

@greatscottlab 2 года назад

Thanks for the feedback :-)

@the-THORNSPAWN 2 года назад

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.

@KekTekDe 2 года назад

Basically just a single pullup resistor if ur fine with the 8mhz internal oscillator. Otherwise +2 caps and a crystal

@the-THORNSPAWN 2 года назад

@@KekTekDe And an ICSP header or pads. They're a very useful MC

@AudreyRobinel 2 года назад

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)

@KekTekDe 2 года назад

@@AudreyRobinel well, for this project an attiny would be sufficient 😄

@AudreyRobinel 2 года назад

@@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!

@akhurash 2 года назад

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.

@greatscottlab 2 года назад

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 ;-)

@akhurash 2 года назад

@@greatscottlab Yeah it can be very fun trying to fit all the parts and make the layout as efficient as possible.

@bkaytan 2 года назад

@@akhurash How is this comment 6 days ago :d

@xTerminatorAndy 2 года назад

@@bkaytan patreon get early access

@larcomj 2 года назад

@@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.

@anotheruser9876 2 года назад

Create a raised ring around the button so you don't inadvertently press it when sitting down or leaning against something.

@Astarath 2 года назад

there's an on/off switch independent of the button

@evensgrey 2 года назад

@@Astarath It's still a good idea to protect the button, just as it's a good idea to protect the slide switch.

@justin.campbell 2 года назад

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.

@zaprodk 2 года назад

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.

@maks886 2 года назад

shouldn't they be controlled impedance traces? 50R?

@sebastiannielsen 2 года назад

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.

@zaprodk 2 года назад

@@sebastiannielsen you also get impedance mismatch and reflections with a LNA. No way around that.

@sebastiannielsen 2 года назад

@@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.

@michalkana9764 2 года назад

I was always thinking what are those small holes in the PCB's. And now i know it. Thanks for answering my question.

@greatscottlab 2 года назад

Glad I could help!

@mrmarkom 2 года назад

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.

@maks886 2 года назад

True, and the pro-mini doesn't even have the usb-serial chip

@princebanini 2 года назад

This is just beautiful. Going back to redo old projects and make them even better is such a cool way to go about DIY

@alterdavidj 2 года назад

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.

@peronik349 2 года назад

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

@randycarter2001 2 года назад

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.

@andrewjackson2317 2 года назад

I thought the same, and perhaps recessed dip switches as well. I bet the enclosure could be made half as thick.

@gabrielxavier2676 2 года назад

I believe there are 2 buttons, the switch must be activated for the button to work.

@chrisalexthomas Год назад

don't kink shame people randy, maybe I do want butt dialling!

@pekkasaarinen2902 2 года назад

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.

@victortitov1740 2 года назад

wouldn't be surprised if smartphones and pc/laptop mainboards are about there.

@sebastiannielsen 2 года назад

@@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.

@GRBtutorials 2 года назад

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.

@whizzbang7520 2 года назад

Maybe he can make a version 3 for us

@deskpro256 2 года назад

@@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.

@kavyatayal2341 2 года назад

@grbttutorials Please post a video of making this project even smaller

@robonator2945 2 года назад

@@deskpro256 can you link the release when its done?

@PratyushTewari 2 года назад

I like the new intro reel more than the old one. It is perfect amount of length.

@user-cq5or6lx6n 2 месяца назад

As someone with social anxiety, this is a godsent project.

@yodad4776 Год назад

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 ...

@skloter 2 года назад

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.

@patrickjeromeobaldo2450 2 года назад

Now you can keep track of every chair you sit on. Great project!

@elijohua 2 года назад

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.

@Jonas_Aa 2 года назад

Have you ever bought from Win Source? Hard to tell which ones are scammers or not.

@anmolkumar6704 2 года назад

Nice to see someone using 4 layer pcb :)

@greatscottlab 2 года назад

Glad you like it!

@ergoncardia 2 года назад

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 !!

@greatscottlab 2 года назад

Thanks :-)

@haydenc2742 2 года назад

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!!!!

@japhillips87 Год назад

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.

@natet3345 2 года назад

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.

@TheSupertecnology 2 года назад

Maaaan that's such a great example of multi-layered PCBs! Gotta love the enthusiasm of the outro.

@no-one3795 2 года назад

Wow. The circuit is beautiful and complicated at the same time. Really amazing work.

@greatscottlab 2 года назад

Thanks a lot!

@sundjinnkari 2 года назад

Delivered exactly like I asked for, thank you for the video and the hard work!

@andrewjackson2317 2 года назад

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.

@omskariyazmaraikayer913 2 года назад

This is the first time I saw great Scott on video. Mashallah a good looking man.! May God guide you always.

@after5hock273 2 года назад

How I haven’t seen this awesome channel before is beyond me. Definitely subscribed

@WarriorRev6300 2 года назад

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...

@artursmihelsons415 2 года назад

Nice, this project now is 4 boards shorter than first version! 😉 Now it's more practical.. Great video, as always! 👍

@RomanoPRODUCTION 2 года назад

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.

@hahahhahah1470 2 года назад

I am new to pcb and I learned a lot thanks

@HairyTheCandyMan 2 года назад

As a newb just learning about the metal stencils I'd like to share with you more experienced guys how freaking cool that is.

@JLCPCB 2 года назад

Very nice video as well as PCB design! We love it and we're glad that you're happy with our service! 🥰

@rubabmubarrat 2 года назад

I had been working on making a diy 2 layer pcb and now scott post a video- awesome!

@greatscottlab 2 года назад

Hope you enjoy it!

@DavidMcCurley 2 года назад

So much to unpack. Great video. Thanks!

@bluerilius4362 2 года назад

Thank you for the amazing videos! very useful and informative while still being fun to watch

@Leroys_Stuff 2 года назад

Cool project the chip shortage sucks but you harvested what you needed.

@SeanChYT 2 года назад

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.

@GlennLewis 2 года назад

Nice job! Thanks for sharing.

@ZeroMass 2 года назад

"4 layer" I'm still at single layer home etched... Man I need to catch up to the rest of you 🍻

@greatscottlab 2 года назад

You will get there ;-)

@KangJangkrik 2 года назад

Engineer before work: clean and tidy after work: messy af

@fyremoon 2 года назад

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.

@ChiBearsFan-op8di 2 года назад

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!

@Xlaxsauce 2 года назад

It is very useful and is certainly marketable especially if it were smaller and more inconspicuous.

@SovereignKnight74 2 года назад

Impressive stuff sir! Seriously!

@a6dulsalam511 2 года назад

Good job, I like the way that you working

@greatscottlab 2 года назад

Glad you like it

@jensschroder8214 2 года назад

With two-layer boards I make one side GND and the other VCC after the signal lines. This even makes a small capacitor.

@bruceleealmighty 2 года назад

Love your projects.

@calog2k 2 года назад

Truly awesome

@MCsCreations 2 года назад

Fantastic work, dude! Nicely done! 😃 This project was great, but it's even better now! Anyway, stay safe and creative there! 🖖😊

@George.___ 2 года назад

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.

@tranxn7971 2 года назад

Really nice work!

@markconger8049 2 года назад

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!

@greatscottlab 2 года назад

Yep :-)

@isaacmirandajs 2 года назад

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.

@greatscottlab 2 года назад

Well said!

@cashewABCD 2 года назад

Your brave. Good work

@soggybaguette8457 2 года назад

I’m loving the new intro!

@Wegetsignal 2 года назад

Very cool project!

@ZoGi5555 2 года назад

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

@vladhristov2316 2 года назад

Loved the video. Great Job! And you had not even ONE dislike :)

@mikelong3444 2 года назад

🔥 content #GreatScott keep doing your thing

@rameshd5563 2 года назад

Great video! Looks super cool compared to previous bulky version. Going to make it. 👍👍

@greatscottlab 2 года назад

Have fun!

@Smartcookieibrahim 2 года назад

Your project are very interesting and I want to be a student of you...Scott sir

@NathanCroucher 2 года назад

That was awesome 😀

@abdulkadirgozuoglu8946 2 года назад

wonderful, keep going😄👏👏

@MurcuryEntertainment 2 года назад

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.

@RomanoPRODUCTION 2 года назад

01:23 that smile is incredible (yes again!)

@greatscottlab 2 года назад

Thanks :-)

@festro1000 2 года назад

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.

@blanana_m 2 года назад

Designing pcbs was very overwhelming for me at first but at some point it made click and suddenly was easy

@greatscottlab 2 года назад

Great to hear :-)

@thenextproblem8001 2 года назад

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

@r3tr0_ 2 года назад

And you can also flash the Atmega with the arduino compiled hex file via ISP. Would be a big space improvement.

@thenextproblem8001 2 года назад

@@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

@ProTekkit1 2 года назад

@@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.

@thenextproblem8001 2 года назад

@@ProTekkit1 im just placing some copper pads on top layer and hold the FTDI board on it. No desoldering no problem

@satibel 2 года назад

@@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.

@mrtechs2305 2 года назад

i am really excited to see the new studio wiring video with german standerts and hager stuff!!

@greatscottlab 2 года назад

That will take a while though.....

@techplanethk 2 года назад

Thanks for the video

@uzidore 2 года назад

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 (:

@evensgrey 2 года назад

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.

@JawadAhmadsahibzada 2 года назад

Great 👍Scott !!!!

@mme725 2 года назад

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 :)

@thetomster7625 2 года назад

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

@larspetersen2688 2 года назад

Like most of your videos. Great Scott

@jacquesb5248 2 года назад

you are a genius

@CalMariner 2 года назад

Love the new intro!

@vasiliosapostolou2699 2 года назад

You should definitely make this a full product you can sell !!

@qualiamaxwell6305 2 года назад

JLC pcb =perfect

@tanjiro3285 2 года назад

I was waiting for u💗💗💗💗

@melplishka5978 2 года назад

Great one.

@rickseiden1 2 года назад

I almost always use the auto-router, but then got through the board and fix it up. The auto-router will send leads out the side to connect to a component directly below it, which makes no sense, or put a via and bottom trace where one isn't needed. It also leaves perpendicular traces all over the place. It's a good starting point, but I never leave it at that.

@BESTvsWORST-vx2dg 2 года назад

Oh my god, what a wonderful video, i respect your effort.. thank you

@greatscottlab 2 года назад

Glad you liked it!

@janszczypka5971 2 года назад

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.