I'm using an UNO to program an ATtiny84 (SOIC) with Arduino as ISP, and I'm getting inconsistent results. First, I was successful in programming one ATtiny with a simple blink program for testing. However, I can't seem to program another one. I get the following error: avrdude: Yikes! Invalid devic…

Invalid device signature for ATtiny84 SOIC package

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