He contemplated using an ATtiny for smaller projects, but after looking into what he would need to program the chip under Linux, he could never find the motivation to give it a go.

This includes direction on how to program the ATtiny85 using an Arduino Uno; a neat trick to know even if you aren’t planning on making any candles in the near future.

Anyone who would like to learn Arduino programming and more about the fantastic electronic development platform which is fun and easy-to-use to create ...

ISP :Any ISP that can program ATtiny85, this time I am using a Digispark act as a littleWire. Battery :In order to meet the ring size, I choose CR1220, I expect it can last over half an year.