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The UKHA-ARCHIVE IS CEASING OPERATIONS 31 DEC 2024


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Re: Electonics help Required



Stuart,

> This is what I believe the schematic to be of an electronic time
switch.

I assume you made the schematic from an existing unit?
There are some errors in it, I think there should be more components
connected
to the connection B1-C2-ZD1 wich now connect elsewere.
I think: R4, K1, D1 and R3.

> Two questions, does this look reasonable, I've probably not got the
> transistor right but as I can't ident it it's a guess.
> Second, does taking pad 3 to ground cause the relay to switch.
>
Looks like all components are there to build a working "thing"
(what?)

Luc.



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