Door popping circuit

The magnet thing is interesting, i was thinking something similar with a barcode or thumb print reader behind the glass. Unfortunately, for saftey reasons over here in the UK you need to have a "physical" means to enter the car from the outside, such as a button or handle. Just having no obvious means to get in means your car will not be deemed road worthy.

Powermyster, this is the sort of thing i was interested in. Agree'd, when you "unlock" the doors with the key fob, it is just a pulse that goes through the system to the solenoid, and as such does not remain active. Is there a means that once you have pressed this button on the fob, it clicks over a relay and then the "popping" circuit will have power for say 30 seconds, thus giving you time to actually press the popping switch to open the door?

The light in the car only comes on with a physical switch, or when the door is ajar as it operates on a push switch in the door jam. Having it come on when you unlock (like on most modern cars) would have been perfect, but the car is too old to have this.

now we are getting into the area im looking for!

I found this at the UK version of radioshack, Maplins.

http://www.maplin.co.uk/Module.aspx?ModuleNo=25224&TabID=1&WorldID=&doy=22m7

Would this do the trick? It has 5 ports which are the 2 inputs, and the other 3 are a common and NO and NC.

So how would this figure in my system, i have made a revised diagram, could anyone take time to look at it? This is evolving all the time, thanks for your ideas.

that wont work i dont think.

If i just replace the microswitch with the relay. In the first diagram if you have a look, the popping circuit is not electronically linked to the unlocking circuit. The unlocking circuit makes the popping circuit active by physcially pushing the microswitch with the top of the solenoid. Sorry if this looks misleading.

The maplins ones come as a unit by the looks of it. Granted they are not as nice as the ones from radio shack, but the thing is they are £3 and the other ones are a lot more expensive...!

Would it not be correct in my second diagram? That is just a replacement for the microswitch as far as i can see it?

yes, thats right, but by simply just replacing the microswitch with the relay wont work as that circuit is completly different to the unlocking circuit. They are only linked by the physical movement of the solenoid to push the microswitch. Do you gets me? Hard to explain.

If i was to simply swap the switch for the relay then the circuits would not be linked.

So id have to "tap into" the unlocking circuit as i have removed the previous method of "physical movement" which activated it.

So will my last diagram work, in theory? Im not too hot on electrics, and it took me forever to come up with my original microswitch design. Are all my earths and lives in the correct place in my new diagram?

its confusing to show on a diagram coz its not actually like that in real life, but thats the only way i could explain it!

Right, by tapping into the unlocking circuit and placing the timing relay in there, that should work im thinking. I can set it to say 60 seconds before it clicks off and the button will not activate the door popping.

This is a very good idea, and just the type i was looking for. This way i can remove the unreliablity of having a physical switch, and replace it with an electronic device.

Would thatone from Maplins work? I mean its essentially the same thing as the one from radioshack. On-board timers, 2 inputs and an output with a N/O, N/C and a common?