Olin Lathrop wrote:
>
> > As part of my circuit, I used a relay to convert a full wave rectified
> > AC input to a half wave to detect when the "time set" switch is pressed.
> > This is just a series diode being switched in and out of a leg of the AC
> > path to the full wave rectifier.
>
> I assume the real question is how to get user input to the spinning part?
> If so, there are a number of ways.  We use an IR led/detector in a similar
> product.  How are you getting power to the rotating board?

12VAC power if fed by 2 slip rings.

The 50Hz AC wave form also suppies timing for the clock.

100 pulses/sec = no press
50 pulses/sec = press

I have an IR LED already to detect radial position.

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Best regards

Tony

mICros
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