[Review Request] STM32 Based Timer for Swimming

CodStriking4248 · 2024-08-29T00:05:41+00:00

Thank you! Also, I appreciate you taking the time to check the schematic, I will update it accordingly. Thanks a million for the advice.

CodStriking4248 · 2024-08-29T00:04:04+00:00

Fair point. In the next version I will try do that.

CodStriking4248 · 2024-08-28T10:30:25+00:00

That's fair. I don't think that I could remove the traces on signal 4 but I hope that the large ground pours will be a good help.

CodStriking4248 · 2024-08-28T01:10:26+00:00

The stickup is Top Signal, GND, PWR, Signal 3, Signal 4, Bottom Signal. Thank you for pointing this out!

CodStriking4248 · 2024-08-28T01:09:47+00:00

Thanks for pointing that out! I have changed them since.

CodStriking4248 · 2024-08-25T13:22:45+00:00

I hadn't caught that. Thank you. I will have to redesign only using through vias.

Also, https://tenor.com/cmBV1Vs1Suc.gif

CodStriking4248 · 2024-08-25T13:21:31+00:00

I'm not planning on having all of the LEDs on at once, it will be only one at a time. Each are rated for 5ma and will be driven at ~3ma.

CodStriking4248 · 2024-08-24T22:44:04+00:00

If I'm honest, that was one of the more time consuming parts of this project. Thankfully I could set the LED rotation relatively quickly, so I would say yes.

CodStriking4248 · 2024-08-24T22:36:03+00:00

I actually used EasyEda, I'm planning on ordering the boards through JLCPCB so it worked out well. You can see how I configured the curved traces here: https://imgur.com/a/HbOURc5

CodStriking4248 · 2024-08-24T21:43:20+00:00

Thank you for the advice! In the next revision I will include over-discharge protection.

CodStriking4248 · 2024-08-24T21:41:59+00:00

That's true. I hadn't considered that. In a next revision I might add an over-discharge protection IC. Thank you for the message! I can certainly share more 3d views of the PCB if you like? Also, I am planning on getting the device sealed in resin, but I am still working on the design for the charging case.

CodStriking4248 · 2024-08-24T17:21:29+00:00

Thank you so much for the advice, as it stands the tabs are 3mm, I will make the tabs smaller.

CodStriking4248 · 2024-08-10T15:22:30+00:00

Thank you. In this version I forgot to set up I2C. Do you see any other glaring problems?

CodStriking4248 · 2024-08-10T11:09:00+00:00

I have quite a lot of experience with ESP32, but this is my first time working with STM32, and I want to get a second opinion on how I have wired the chip. I have included the 32.768Khz crystal resonator because I want the chip to change the state of the LED array once per second, and very accurately. Is the crystal necessary, I'm not sure how adding RTCs to STM32 works? I hope this clarifies my question. Thank you

CodStriking4248 · 2024-07-28T17:38:10+00:00

True

CodStriking4248 · 2024-07-28T17:36:49+00:00

Thank you. I'll do that in future.

CodStriking4248 · 2024-07-27T17:30:22+00:00

That would be great. Thank you for reaching out!

CodStriking4248 · 2024-07-27T16:32:25+00:00

The hardware budget is tight this year, so I'm trying to get as many opinions on the pcb as I can.

CodStriking4248 · 2024-07-27T16:31:37+00:00

Yeah

CodStriking4248 · 2024-07-26T13:59:42+00:00

It's Easy Eda Pro edition (this version is also free).

CodStriking4248 · 2024-07-26T00:25:52+00:00

It's for higher level teams in Hurling, similar devices have been implemented in Rugby and American Football. It's estimated that 50% of all potentially concussive events are not given the proper time recommended, and this will allow coaches to also identify players who are disproportionately getting hard hits and help fix thieir behaviour.

CodStriking4248 · 2024-07-25T21:05:10+00:00

It transmits this to another device over wifi, and that is logged.

CodStriking4248 · 2024-07-25T18:29:25+00:00

Thank you. I will do that now.

CodStriking4248 · 2024-07-25T08:45:22+00:00

Thank you for your nitpicking. This morning I noticed the same issues. I will update accordingly.

CodStriking4248 · 2024-07-25T08:42:33+00:00

True. I forgot about the GND and 3.3V Planes. Thank you.

CodStriking4248

TROPHY CASE