[^3]:[Arduino and Outputs by Emma](https://docs.google.com/presentation/d/1wo3i2khO01wCOXhJ0gZDMFHkmKSMPv4ceq1w1Mplnu0/edit#slide=id.g247e8458d58_0_40)
[^4]:[Programming an ATTINY85](https://www.instructables.com/How-to-Program-an-Attiny85-From-an-Arduino-Uno/)