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  1. V

    Low frequency adjustable but stable oscillator

    101ppm perfect! Yes, i do realise the stability of the system is only as stable as the sum of all the parts.
  2. V

    Low frequency adjustable but stable oscillator

    Wow, lots of replies :-) And yeah; it is about 10% fast not slow. So 55hz would make it faster! lol Motor says 50KTYZ - but no 1/1.2 50/60 text; Possibly a rip off motor that is 'approx' 1RPM at 50Hz... It is Australia here and deffo 50Hz; so I reckon just a crappy motor (look at the spelling...
  3. V

    Low frequency adjustable but stable oscillator

    Sort of. But i was thinking more along the lines of a chip, or two, a crystal and the odd resistor and capacitor. Powered from rectified mains and a resistor/zener down to 5v.... My initial thought was a 10Mhz xtal and a chain of dividers. But i need it to be adjustable 55Hz +-10ish. Then i...
  4. V

    Low frequency adjustable but stable oscillator

    I have a 50KTYZ syncronous 1RPM motor I got for a swimming pace clock. Only, it turns out to be actually 1.1 ish RMP @ 50 hz. Using the 50KTYZ as it is a BIG clock - so lots of torque needed So, having an electronics background (but not for about 25 years!) I thought, no problem; i'll do a...
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