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From: Jan Panteltje <alien@comet.invalid>
Newsgroups: sci.electronics.design
Subject: Re: SSR question
Date: Thu, 12 Sep 2024 06:30:40 GMT
Message-ID: <vbu1qh$4sn6$1@solani.org>
References: <ehm4ejlc33vckjoevn36k5odl9ugnt5sfk@4ax.com> <vbts8t$33cq$1@dont-email.me>
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On a sunny day (Wed, 11 Sep 2024 21:55:57 -0700) it happened John Robertson
<jrr@flippers.com> wrote in <vbts8t$33cq$1@dont-email.me>:

>On 2024-09-11 8:08 p.m., john larkin wrote:
>> 
>> Given a power supply that needs 120 volts AC input, I'd like to use a
>> small front-panel power switch at some low voltage, not run the AC
>> line up to the front panel.
>> 
>> Do people make SSRs that would do that, accept a low-voltage switch
>> closure to switch AC?
>> 
>
>Sure, there are the TRAIC SSR bricks that take 4 to 32VDC to switch - 
>and can handle tens of amps.
>
>https://www.digikey.ca/en/products/filter/solid-state-relays-ssr/183?s=N4IgTCBcDaIIIGEAEAXATgSwIYGMQF0BfIA
>
>And also the opto-isolated TRAICs like the MOC302x family from Lite-On.
>
>Of course you need some power to enable that stuff to run - perhaps a 
>capacitor/resistor driven supply that sucks a tiny amount of current 
>from the power line to enable the drive circuit?

Opto-triac, powered from a photo-cell connected to a small coin type battery like for SRAM backup?
Of course impulse switch, nano amps CMOS D flip flop..

Have some Microchip PIC single button on/off stuff like that,