PCB Making: Customized Arduino(Atmega328)/Attiny85/555 Timer circuits
1. Customized Arduino, 12/2021
An ‘Arduino Uno’ tested on breadboard:
Arduino schematic drawn in Eagle:
2. An adjustable timer made with a 555 timer, 12/2022
3. Project done in MML using Attiny85
The previous version with FTDI chip(USB to TTL converter), however, the chip was out of stock so I just abandoned the idea of intergrating it on borad.
Self fabricting PCB etch using cupric chloride. We made this in xFab’s classes: