using a relay for a latching circuit

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Originally Posted by POD

Thanks for that. A problem with that schematic though, unless I'm missing something, is that the only way to turn the heater off is to turn the ignition off. Still leaves me needing a 'normally closed' switch to break the coil circuit.

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ahh yeah, I forgot about the off bit its like a logic problem.
that will be brain fart 2. This is why I dont do computer programming. I'll have another try.

here we go, tested in my head , works,

push button for on, push again for off . you could add a pilot light across relay 5 coil so you know its on or off incase the boss says "I thought you turned seat warmer on"

this is as simple as it gets with relays, if you want a single pushbotton for on / off.
you will need 2 diodes. tbh much easier with transistors and more compact too .


Attachment 188431

It might take me a while to get my head around that! :)

Just put an ON/Off switch on ignition in feed,that will turn it off while ignition is on, if push button switch has been pushed.

As for diodes,transistors,i don't know as we normally work on 240,415V,etc,and don't use them.

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Originally Posted by p38arover

Can you post an image that’s not squashed.

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Or not vertical, my eyes ARE horizontal not vertical.[bigrolf]