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From: Joe <none@nowhere.whereo>
Newsgroups: comp.sys.raspberry-pi
Subject: Re: latching relays
Date: Mon, 10 Feb 2025 12:33:19 +0000
Organization: A noiseless patient Spider
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On Mon, 10 Feb 2025 09:12:32 +0000, Mike Scott <usenet.16@scottsonline.org.uk.invalid> wrote:

>Hi all. I think a latching relay is the way to go for a pico-based job I 
>have in mind. However the prevalent ones all seem to be controlled by a 
>pulse on a single input wire which flips and flops the state.
>
>No doubt they reset to a known-state at power-up. But I see no 
>indication of any way of resetting them to that known state without 
>turning off the power - eg after reloading the pico control program.
>
>Has anyone used these and can offer advice please? Thanks.
I am using the HFD2/005-S-L2-D dual coil relays.  They work for my purpose....

See: https://source.hongfa.com//Api/DownloadPdf/323