John Kennedy on Nostr: A discrete (and reversible I hope) composite video mod for the ZX80 - the first ...

A discrete (and reversible I hope) composite video mod for the ZX80 - the first computer I ever programmed. Turns out the fancy SMD adapter I bought was designed for a ZX81 and does NOT work in a US spec ZX80. All it took was a 2N3904 and two resistors. Didn’t need to gut the modulator - just snipped a wire or two.