Electricity scares me (circuit questions)

DanWeino

Ok, I'm running ideas through my head of what to do with myself this summer. Basically I'm thinking I want to dick around prototyping an rfid lock for my car door (not gonna fit it, im not silly, yet). But I am a noob at anything involving wires.

To represent my car battery I'm thinking an old scalextric power base thing like this.

Next I want to attatch it to an RFID thingamajig similar to one of these.

Then hook it up to a central locking kit (my car is pretty old so it'll be one of those conversion dodads. Like one of these.

Now everything seems to be 12v. Hypothetically, if I connect it all up, would it work or will something pop?

I know that having a simple on off power switch will not replicate two separate actions (locking and unlocking) which is why I would try and locate a kit that would work off a single button, i.e if its locked, it will unlock, if its unlocked it will lock.

Now then. Will this all need much more knowledge than I currently possess (which is reading that they all use 12v)? Or do I need transistors and resistors etc etc?

Thanks in advance to anyone with an answer.

wmelon

The only potential problem I see is that neither the car locking kit or the RFID kit say how much current they require. But I'd honestly be surprised if they needed more than the 0.9A that the transformer you found can provide.

You could easily handle a two button locking kit with just a simple DPDT relay.

Shouldn't be too much of a problem.