Tony wrote:
<snip>
>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.
>
>Is there a way to do this without a relay?

How about an SCR (in anti-parallel with the existing diode) with an opto
for control isolation if required.
Regards...

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David Duffy        Audio Visual Devices P/L
U8, 9-11 Trade St, Cleveland 4163 Australia
Ph: +61 7 38210362   Fax: +61 7 38210281
New Web: www.audiovisualdevices.com.au
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