 | | Re: Basement water alarm
|
| Do you mean that my alarm clock follows the 60 Hz carrier? That confuses me-- I once programmed my Timex/Sinclair Z80 to be a clock based on the power line carrier. It kept terrible time. I assumed it was because of the inaccuracy of the carrier. (...) (25 years ago, 3-Feb-00, to lugnet.robotics)
| | | | | Re: Basement water alarm
|
| (...) I'd think it has an accurate crystal oscillator. (...) No, the frame counter in the ZX80/81/Spectrum (if yours is a ZX80 rather than 81, I'd like to buy it, BTW) simply counts the TV frames it produces. Those, in turn, would be about 60Hz in (...) (25 years ago, 3-Feb-00, to lugnet.robotics)
| |
