looking for relay circuit triggered by momentary switch

[Hitch96]

Need a 12v circuit to operate fog lamps
Triggered on/off By momentary switch

 

[gophert]

A non-latching relay operated by a momentary button requires many more parts and a circuitboard and logic chips (d-type flip-flops and several transistors to finish the job.
Will you use a latching relay or a standard relay? If not a latching relay, why not use a toggle switch?

 

[rjenkinsgb]

Just get an automotive grade latching relay such as this:

Relays > 12V Relays - General - 12V Latching relay - Auto Electric Supplies Website

This relay is a change over relay that can be remotely controlled by a momentarily on switch. For ex...

www.autoelectricsupplies.co.uk

They stay in whichever state forever and only alternate states when you connect power to the coil.

It's got an example connection diagram on that page.

 

[Hitch96]

Thanks for the information
I will try a latching relay setup.
This is going on a motorcycle and the switch setup I bought has only a momentary switch option

 

[KeepItSimpleStupid]

there is a circuit here: https://electronics.stackexchange.com/questions/360771/one-pulse-to-on-off-bistable-latching-relay

It requires a dual coil magnetic latching relay. The relay coils are usually labeled SET and RESET. You pulse the coil in the correct polarity and a magnet holds it in place. If you apply the reverse polarity pulse to SET, you get a RESET "coil";

So, power is not required to keep the current state.

You would use 11, 13 and 9 to activate an automotive relay which has the current for your lamps. the contact rating for the latching relay should be DC and >150 mA. Automotive relays are good for 30-40 Amps. terminals mount down and they have sockets.

 

[gophert]

Motorcycles vibrate, and vibrating stranded wires break (especially if the wire slack moves with the vibration) and wire insulation abrades. Make sure you use proper, automotive quality wire and try to use crimp-on connectors and cord restraints (or tie-down any slack to minimize force on single strands of the stranded wire).