momentary p/b start and stop 1st post

Basically the issue is when switching the latch off. It needs a very short pulse, which is possible with an extremely quick push on the button, but not really practical. The set up I am thinking of is the latching circuit will control seperate ACC and IGN relays, starting will be done with a DEI528 timer relay. All should be switched on/off with a stock push button, which is not really a pulse.

I'm trying to make sense of this too.... I'd like to replace the ignition key for my boat with a push button. I already have a switch to turn the batteries off completely when desired. I picked up a (overpriced) momentary push button and (1) SPDT relay under the assumption (and guidance of generic seller instructions)that this would be all I needed to accomplish what I wanted to do. After finding this site, I now know that I am far from where I need to be. Here's what I'd like to do with a single momentary switch; push button to turn on latched acc power and momentary to start boat push button to turn off latched acc power and subsequently the boat From the wiring diagrams on this site, it looks as if I need about 10 more relays to accomplish this, if at all possible. Is it possible to have a latched AND momentary circuit off the same momentary switch? The switch has 2-N.Closed and 2-N.Open circuits, along with a led + and led - It seems it may be easier and cleaner to pick up a second switch that would be latching? Any help with this would be greatly appreciated - thank you

i am an idiot wrote: You will need an additional relay with a resistor/capacitor delay circuit.  The delay circuit will keep the relay from energizing for the first half of a second of the initial push of the button.    <

Ok, I get all of this, but, where does the additional delay circuit fall in place in relation to the push button? Is it a completely separate circuit wired up to another of the buttons wire terminals, or can it be co-mingled with this other chain of relays? I'd assume it can go in line with all these, and it would just create a second 12v+ output?

Just FYI: A latching SPST relay. One normally open button turns on. A normally closed button turns off (or remove +12V power).

Hi miniboy, could you explain that with a diagram here or by email? I'm still stuck with providing a pulse for the relays, pressing momentary button alone is not good enough. Help appreciated. boris.jake@gmail.com Thanks

Let me see if I have this? Working from these 2 diagrams, I'm going to take pin 86 from the far left relay and run it to pin 85 on a new relay, then pin 87 from relay #2 (left to right) will wire in to pins 86 & 30 on the new relay, and pin 87 from the new relay will go to the ignition wire to start the engine. This will combine the two diagrams and give me latched on/off for the accessories, and momentary to start the engine? And therefore eliminating the need for the key?

Note: the battery will not be needed on that second image.

You can not wire a stand alone relay to the starter from the push button. THis will cause the starter to turn even when you want to turn the car off.  I will email the diagram I use. I can not figure out how to post it (it is a pdf)