delay off relay

I have Used my circuit for many applications and I do think it will work.

John DeRosa (Hotwaterwizard)

Stockton California

When in doubt, try it out !

Or use a DEI 528t or 611t both almost as cheap as buying the parts or get an interior (dome) light delay kit from Velleman. Ad yes a pulse timer from the unlock cycle is exactly what our poster requires.

Or Velleman K3500 kit.

The Velleman Kit looks ideal. I liked the 555 timer idea but i can't get it to work right. The two relay ideas seem feasible they just seem a little bulky.

Thanks for 12 volt.com and team member hotwaterwizard for OFF DELAY CIRCUIT, I am going to use the circuit on my diesel car for remote start and I also want to include antigrind feature, but my confusion is I want wait to start relay like 528T, but the relay circuit is shown as OFF DELAY, I need ON DELAY CIRCUIT, also I want to learn the difference between NPN and PNP applications. I feel very happy to be with you for discussing though I am not a professional, but still I can make things what I want with your kind help. The cost of shipping is tripled if I am to go for 528T. Hats off to your help. My requirement is for positive pulse.

All reputable remote starts have a built in fixed or variable time diesel delay. The 528t can be configured for delay on OR off, POS OR NEG trigger.

For on Delay use 87a for the load instead of 87 on all of the circuits.

A larger capacitor will change the durration to longer time period. also a 50k variable resistor instead of the 33k resistor will make it settable for shorter or longer periods.

John DeRosa (Hotwaterwizard)

Stockton California

When in doubt, try it out !

Please show some light on the circuit showing TIP 31 NPN and TIP 32 PNP, please provide description on both circuits.I am to make circuit at any cost and come back to you. But I am going to simulate the things by putting dummy load like 35 watts bulb and the make circuit and adjust the delay to my requirements, but first I want little understanding for wait to start relay application- 1) when I press the remote start, first pulse will start ignition lights and later by using the earlier pulse received by the delay relay which is between starter and out pulse -make delay of 30 seconds and then shots a brief positive pulse to stater, which starts the vehicle. As I said earlier I will set up things and start to do practicals. I am already having autocop basic alarm system to which I am going add etc remote to start the vehicle.    Thanks for providing tips to go ahead, I love you people.

almost any transistor will do the job aslong as it can handle the current of the relay coil.

I have actually used a 2N2222a for the circuit with a small relay.

John DeRosa (Hotwaterwizard)

Stockton California

When in doubt, try it out !

Look at this circuit!

I redrew the circuit so you could understand it.

John DeRosa (Hotwaterwizard)

Stockton California

When in doubt, try it out !