ZX81 peripheral supply PCB
The object of this project is to give the +5v and +9v supply to power ZX81 peripherals without a ZX81.
For this project you will need :-
10uf 16v capacitor
7805 5v regulator
9v dc supply and connector for it ( mine is center positive )
some hook up wire
Here it is in use powering a ram pack for voltage testing!
It could be made a bit smaller and tidied up a bit. all 46 pins could be "broken out" to a header if a double sided version was drawn up in a cad package like EAGLE.
I might do this at a later stage! so come back and see if it is done!