Based on the Arduitape by Duncan Edwards. Download his firmware from http://arduitape.blogspot.com/ and remember to support him and his work.
Arduino Micro SD Card Reader Module
IIC/I2C 1602 44780 LCD Display
Arduino Audio Amplifier Board
2 x 3.5mm Audio Jacks
1 x 2.5mm Audio Jack
5 x Momentary Push Buttons
3 x 2 Pin Header
1 x 4 Pin Header
1 x 5 Pin Header
2 x 6...
This is a very basic PCB to put a Raspberry Pi Zero into an old sinclair spectrum 48k case...
Code is by a Mr P J Evans and is called ZX Scanner on Github, I've basically made a PCB of his work and added my own hardware parts!
There's a footprint for an RTC this will use generic Pi RTC code
There's a footprint for an Adafruit I2S amplifier board...i've only put this in for those that want to run...