Door popping circuit

yeah, sure.

For the sake of £3, i think the maplins are the way forward. Even if it dosent work its only been a few £. It dosent come with a case, but i can easily make a case from plastic and fibreglass.

I just want something more reliable than the old microswitch, as it had a habit of not tripping on steep inclines for example.

So do you think i might be successful with this type of design? I suppose it makes sense.

cheers.

Here is the diagram which i am going to follow. Can anyone see any problems that i might face with such a system?

yes, i understand that, but im trying to make this system on minimum cost! Id like to try the cheapest alternative before actually buying the top parts.

I have found this about the Maplins pulse relay, can someone please advise because as i said i am terrible with electrics.

Specifications

• output relay with dry switch-over contact: 3A/24V
• pulse time adjustable: between 0.5 and 5s
• pause time adjustable: between 2.5 and 60s
• power supply: 12Vdc / 100mA
• dimensions: 40 x 85mm (1.6" x 3.4")

Would this be adequote?

ok then, the project is a go'er. Well, unless anyone else can think of any other idea's!

This was the sort of thing i was thinking of when i made my first attempt, but i didnt know that you could get a relay to stay over with just a short pulse.

I really appreachiate the help so far, and the on-going advice.

Ok guys, the plot thickens...

Im going to buy some of these http://store.qkits.com/moreinfo.cfm/MK111 from Maplins, they are only cheap and will do the job.

Now, i started to think about various scenaro's... The circuit we talked about earlier will work a treat, BUT ONLY if you are wanting to get into the car and drive away.

What if i use the system, get in the car then drive away. Then i pull up to pick one of my friends up. I stay in the car with the engine running. PROBLEM, the system was only primed for the first 60 seconds since i activated the unlocking, and therefor the one of the passenger side is now inactive and will only become active if i operate the locking mechanism again.

Now what do i do!!!

There must be a solution somewhere!

ok then, try this. What if there is someone in my car, i get out and leave the keys in there so the stereo is playing for them.

I come back from the shop, and i cant get in unless they have to climb over from the other seat and open the door for me.

Any ideas on an electrical system to combat this problem?