Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Non-English post deleted - moderator
While that can't be helped, let us device a timebase, so that people who own such clocks can us them.I have tried to mod the sc8560 and perhaps need a wetting of the circuit to prevent errors. I seek your help.I think the mains frequency drifts all over the place in some third-world countries.
your proposal is of course fine. still we need the power drivers. It is for few interested persons and mostly we use Analog clocks with a single AA cell as it serves for an year. Such digital clocks with mains time base are never sold here as either a product or as a kit. Always kits include crystal based time base.It might make a good 8pin PIC project for someone as the MM5369 is getting hard to find. The 12F series chips such as the 12F629/675 or 12F683 with a crystal would make a good substitute for the MM5369. A PIC could supply either 50 or 60Hz with both phases, simplifying the circuit. You could sell pre-programmed PICs to others in India.![]()
Let us not go on playing th same record . entire world know that you are better off. i feel , that we might confine to offering a possible solution to the issue under the present conditions, rather than pointing at those countries that you are poor or under.... you might agree with meIn Canada and the USA. Britain, Germany and many other civilized countries the mains frequency averages to be EXACT (within a few hundred parts per million) so that electric motor clocks and record players are correct.
Let us not go on playing th same record . entire world know that you are better off. i feel , that we might confine to offering a possible solution to the issue under the present conditions, rather than pointing at those countries that you are poor or under.... you might agree with me
Thanks for your understanding and co-operation please.Maybe third word countries should complain about their ancient problems on theiir own website in their own 3rd world country.
Clock radios are cheap and are made to use a very accurate mains frequency.
If you want to use an obsolete crystal oscillator IC to make an accurate timebase then try it.