Quantity   Component name
1 × Brother AX-25 (or similar) typewriter
1 × Arduino Nano v3
1 × Raspberry Pi Zero W (or Zero 2 W)
4 × CD74HC4067 16-Channel Analog Multiplexer-Demultiplexer https://www.sparkfun.com/products/299
4 × 0.1 uF Ceramic Capacitor https://www.sparkfun.com/products/8375
3 × 330Ω Resistor https://www.sparkfun.com/products/8377