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      07-25-2006, 01:26 PM   #30
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Drives: 335Xi ZSP, ZCW, PDC
Join Date: Apr 2006
Location: NY

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Originally Posted by txusa03
So when you took the circuit board out, you added the LED on the board so you can test it while it was removed from the car so you did not have to go back and forth? Then when you are happy with the test result, you but the LED back into the clown nose? Just want to have this clarified..
I used a circuit board that I bought from Radioshack. Otherwise you are correct.

PS It is not very clear from the above but I did not remove LED from clown nose I used a spare LED.

Originally Posted by txusa03
I did not take my rear view mirror apart so I do not know how the original circuit board look like. I cannot tell from looking at your photo which wires you added to the board.

Also, how can you be so sure that your DIY did not create any kind of current leak? I guess this is where the MS in EEE helps.

It is great but it will be a huge task for me to do.
The current at pin 1 is already restricted and fused, so you don't have to worry about spikes. Also, the diod D1 is there for protection of microchip and in case you switch wires by excident.