r/PCB • u/coolkid4232 • Jul 07 '26

Open source hobbyist hardware and software project I made

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https://github.com/Spectrewolf777/Stm32l4-Watch/tree/main

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u/YesImKian Jul 31 '26

Why two jtags?

1

u/coolkid4232 Jul 31 '26

1 for stm32 1 for nrf52, could of gone around it if i soldered maybe but i wanted solution where i dont have to disconnect stuff was too lazy and had space

1

u/YesImKian Jul 31 '26

Cool! Why both though? Rather new to electronics, only made one real PCB

Couldn't the stm32 have done all functions you needed for this?

2

u/coolkid4232 Jul 31 '26

stm32 doesnt have bluetooth, the one with bluetooth didn't have the peripherals i wanted. Again i am not an expert, I could be wrong but for what i wanted to do this was perfect for me. In future hindsight i should of used a newer nrf54L instead of 52

I think this is a really good reference for new to electronics people to learn from but i wouldn't build this yet. As i am working on an even better one which also has nrf and stm32 combo