Re: relay modules?

On 10/04/2024 11:50, Mike Scott wrote:

Hi all. Two separate projects which will need a relay of some sort to run from a Pi or similar.
 I'm really looking for something plug-and-go rather than build-your-own (especially item 2 below)
 First is a dpdt relay to switch around 12-20 V at a couple of amps. spdt are easy to come by; the only dpdt ones I've found are on aliexpress, but their longevity is possibly open to question :-{
 

a bank of 4 SPST relays will do the job if you wire them thoughtfully.
e.g.
https://tinyurl.com/4vw34usb

Second is something to switch mains safely - a full 13A to run a 3kW heater. I've drawn a blank: best I can think of is to butcher one of those wireless mains switch modules, which would at least provide a good isolation gap :-)
 

I use one of these to control my 3kW immersion heater to soak up excess solar power.
https://tinyurl.com/mv4az28r
They're reasonably easy to reprogram to run from your own wifi.
e.g. https://www.elektroda.com/rtvforum/topic3912748-30.html

TIA for any ideas.
 

--
Nev
It causes me a great deal of regret and remorse
that so many people are unable to understand what I write.