I have been at this for a while, trying to program my ATtiny84A using an Arduino as ISP. But I seem to be stuck and cannot figure out why. I am trying to transfer my arduino nano project to smaller footprint using the ATtiny to eventually print a custom PCB. In any case, I can’t seem to connect t…

Unable to program ATtiny84A with Arduino Nano as ISP – “Invalid device signature”

Railroader August 8, 2025, 6:21pm 2

2(!) requests:

Failed attempts not useful.