As John said for a flashing LED (Light Emitting Diode)
the pulse is already there as it shows on the dash with the existing flashing LED
, just a matter of finding the connection isn't it. Like this idea a lot already.
It will only be accessible on the IPKs PCB (Printed Circuit Board)
I would think. The BCU (Body Control Unit)
will send a message to start fast flashing, then slow flashing. Then the bus communication will go to sleep, and the circuits in the IPK (Instrument pack (IPK from the German))
keep it flashing.
Unless you really want it to show locking status, easisest is probably to drive a relay from ignition, and supply the Normally closed contacts with battery, the output going to the LEDs. Then the LEDS will light when ignition is switched off (or accessory if you choose)
Don't forget if you buy a standard LED
you will need a resistor. 470 ohm is typically right for 12v but does depend on the LED
modules are available with a built in resistor, and attached wiring. You can also get flashing LEDs. Probably all available from fleabay.
The size of the LED
doesn't have much bearing on the brightness. You can het ultrabright 3mm ones, or standard brightness large ones. There's not even a big variance in current, but there can be a big difference in viewing angle. I have some on a test rig that have a very narrow beam. They never bother me sat next to them, but people across the other side of the office, 20ft away are always complaining if they are on.
these:http://cgi.ebay.co.uk/50-x-5mm-Red-Ultr ... 45f8c8ab69
are ones that would do for 12v. Nice clear LED
when not on, and seem quite bright. You would need to solder the resistors onto the LED
and add wires. You also have to connect them the right way round or they go pop.