Sinclair ZX80 / ZX81 / Z88 Forums

Posted: **Fri Nov 01, 2024 7:25 am**

Hello there!

Here is a simple Real Time Clock (RTC) project I have recently built and tested on a ZX81 but should be compatible with the Spectrum and other Z80 machines. Cost and simplicity are the main reasons for choosing the DALLAS DS1287.

http://www.pictureviewerpro.com/hosting/zx81/wilfr.htm

Wiring diagram:

WilfRigter_REALTIME_diagram.pdf: (118.69 KiB) Downloaded 111 times

Kicad project:
http://abandon.pcbs.free.fr/wilfrigter/RealTime/

Sinclair ZX80 / ZX81 / Z88 Forums

Wilf Rigter's "Real Time Clock" [Kicad]

Wilf Rigter's "Real Time Clock" [Kicad]