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От : David Higton 3:770/3 11 фев 25 19:04:20
К : Mike Scott 11 фев 25 22:32:01
Тема : Re: latching relays
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Mike Scott <usenet.16@scottsonline.org.uk.invalid> wrote:
> OK, I get it. I`m after something that`ll retain the same setting for
> extended periods, hence the desire for a latching relay to keep power
> dissipation down. Indeed, it does look as though what I`ve been looking at
> is a normal relay plus a flip-flop - not what I want, and I think you`ve
> saved me from a bad mistake.
>
> Not wanting to mess with relay driver circuitry, I`ve found something
> that`s definitely latching at PiHut (I hope!!). Pricey, but complete
> modules don`t seem available otherwise.
>
> Thanks to all for commenting.
Look at the Hongfa HFD2 data sheet. The range includes single side
stable (i.e. an "ordinary" relay), 1 coil latching, and 2 coils
laching, and shows how to connect and how to energise to get latching
relays of either type into the state you want.
The latching relays are the real thing; they retain state indefinitely,
without power, after being set to either state.
David
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