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    were to obtain rotary timer switches

    were can I obtain those rotary timed switches which shut off after a set duration to which they are turned to? typically, preferably not, they emanate a clicking noise as they elapse closer to shut off. Need low power ~12.5vdc switch.
    Last edited by Zak28; 9th November 2018 at 07:13.

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    Re: rotary timer swiches

    There are types which are clockwork, you wind up a spring and an escape mechanism ticks as it slowly releases the tension and there are types with a small motor that gradually moves the setting to zero. The place to look is in a domestic appliance supplier as they are still widely used in cookers and microwave ovens.

    If you need accurate timing, consider a potentiometer hooked up to the ADC input of a small MCU and use the measurement to set a software timer. You can use another pin to switch the load or drive a relay.

    Brian.
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  3. #3
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    Re: rotary timer swiches

    Im looking for the clockwork types however I could not find any off reputable retailers.



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  4. #4
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    Re: rotary timer swiches

    Maybe try:
    https://www.intermatic.com/en/Timer-...2%20ascending&
    or
    https://www.intermatic.com/en/timer-...2%20ascending&
    Searching for "clockwork timer" seems to work best.

    Brian.
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    It's better to share your questions and answers on Edaboard so we can all benefit from each others experiences.


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