T³: Programming an ATtiny84A from Arduino

I ‘m currently working on a project that requires a cheap, low-power microcontroller that ‘s programmable through Arduino and has a few more pins than the ATtiny85. That ‘s where I found the ATtiny84A. It has many of the same features as the ATtiny85, but has 12 I/O pins instead of six. As it turns out, a lot of work has already been done to program ATtiny microcontrollers from Arduino, which makes this pretty easy. To start, connect an Arduino (UNO, etc.) to the ATtiny84A using the Arduino as ISP configuration. I ‘ll be using a 3.3V Arduino Pro Mini to keep everything nice and tidy on a breadboard.”