DIY ATtiny85 Programmer shield for Uno
DIY ATtiny Programmer shield for Uno
DIY ATtiny85 Programmer Uno Shield.
Resources:
HighLowTech:
http://highlowtech.org/?p=1695
Arduino as ISP:
https://www.arduino.cc/en/Tutorial/ArduinoISP
SparkFun:
https://www.sparkfun.com/news/2237
GreatScott on YouTube:
https://www.youtube.com/watch?v=9LjfkjwMqXI
Make Magazine:
https://makezine.com/2011/10/10/how-to-shrinkify-your-arduino-projects/