Blinking neckLACE !

Hi everyone,

I am a total newbie. I want to make a blinking necklace: So my system must be super compact (like a 10 euro cents sphere)

microcontroller LED battery and resistance I guess

My questions

  • Which microcontroler small enough can I program with Arduino ? (a ATtiny4 would be good?)

  • Can I link those elements just with wires to avoid the place taken by a board ?

It would really help me to know the answers of those questions ;)

Thank you very much in advance for the time you will give me !

A necklace?

Yeah sorry just corrected

Electrochocolat: - Which microcontroler small enough can I program with Arduino ? (a ATtiny4 would be good?)

I'm not aware of an Arduino hardware package for ATtiny4 or any of that family. Of course you can use it without the Arduino IDE. If you don't mind going a little bigger, there is good support for the ATtinyx5 family here: https://github.com/SpenceKonde/ATTinyCore or if you want to go more minimal, the ATtiny13 here: https://github.com/MCUdude/MicroCore

Electrochocolat: microcontroller LED battery and resistance I guess ... - Can I link those elements just with wires to avoid the place taken by a board ?

Sure, but don't leave out the decoupling capacitor!

Thanks you very much for your answers !