UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - American 60Hz clock

TrevorG3VLF · 12th Jul 2019, 7:32 am

I have seen circuits of a 300Hz oscillator, phase locked to the mains and then this is divided by 5 to get 60Hz or 6 to get 50Hz. This will then need to be amplified to get a suitable supply for the clock.
Pulsed DC could work if the DC was blocked and only the pulses passed but you will need an accurate frequency source. There are invertor circuits to give out AC.
This is a nice little project using CMOS or a microprocessor.

12th Jul 2019, 7:32 am	#5
TrevorG3VLF Rest in Peace Join Date: Apr 2011 Location: Matlock, Derbyshire, UK. Posts: 1,378	Re: American 60Hz clock - Will it run on pulsed DC? I have seen circuits of a 300Hz oscillator, phase locked to the mains and then this is divided by 5 to get 60Hz or 6 to get 50Hz. This will then need to be amplified to get a suitable supply for the clock. Pulsed DC could work if the DC was blocked and only the pulses passed but you will need an accurate frequency source. There are invertor circuits to give out AC. This is a nice little project using CMOS or a microprocessor.