Sinclair ZX80 / ZX81 / Z88 Forums

Thanks for all of your replies. I'm now better equipped: I have a logic probe, and an EasyCAP AV capture device (see http://goo.gl/qx87VM), which I'm told can output the video from the ZX to a modern computer. Thus equipped, I've set out to implement the tests that 1024MAK described on 26 April - bu...

Thank you Karl. I've got a power supply, and have opened up the ZX81, to test the voltage across the points shown in your photo. I find 4.98 - 4.99 volts, which surprised me almost as much as Voyager's continuing to transmit. I also find that the heatsink heats up when the ZX is left plugged in. Jus...

Thanks for your quick reply Karl! My equipment: 1. the ZX81 itself; 2. a Memopak 16k RAM expansion unit; 3. the Switch box; 4. a DMM, soldering iron, and local Hackspace. I've not been able to test it recently as I don't have the connectors, or a TV. I don't have any notes from my previous attempts ...

I have just retrieved my old ZX81, which hasn't worked in years, and am wondering what it would take to get it working again. (We've just started a Code Club at my sons' school, and I'm thinking about bringing in the Sinclair as a curio at some point.) Is there anyone in the London area who might be...