Re: solid state relay??

Mike Scott <usenet.16@scottsonline.org.uk.invalid> wrote:

On 01/08/2025 14:49, David Higton wrote:

If you can drive relays momentarily but not continuously, consider
bistable relays.

 
I do have some, bought for another part of the project. But at IIRC ~£7
a pop, they're not cheap: I need 8.

I'm seeing things like this for searches of 'magnetic latching relay' for £1
a relay or £2 on a board with GPIO inputs:

https://www.aliexpress.com/item/1005009593982672.html
https://www.aliexpress.com/item/1005005163980370.html

No experience, but I think there are some boards which do the latching
digitally and then drive a conventional relay.  These ones look like the
real deal.

You have to hold the latching inputs for a certain length of time - not sure
what happens if you exceed the rated time, I don't know if there's a danger
of burning something out (railway modellers will perhaps be all too familiar
with this idea from motorised points).

Theo