LEDs are Light Emitting Diodes. This means that current will only flow one way through the diode and in doing so emit light. The LED will have a flat on one side which indicates the cathode lead which needs to be connected to negative battery polarity (earth for negatively earthed cars). I fconnected in reverse, no current flows and no light is emitted. You also need to limit the current flow through each LED by using a resistor in series. If not it will emit light briefly before it catches Lucas disease. Most LEDs operate in the range of 15 to 50 Ma. Resistors in the range of 1KOhm to 330Ohm at 1/4 watt will accomplish that.

So does that mean it will work on my positive earth car or not?

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"In two years time your car will be like a lady's clothes, out of date, my car will still be in fashion when I am dead" - Sir Alec speaking to Pininfarina

Sure will but you need to reverse the diode polarity. This time the anode (the other lead) goes to earth if its a positive earthed car.

Righto, sweet. Thanks for that

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"In two years time your car will be like a lady's clothes, out of date, my car will still be in fashion when I am dead" - Sir Alec speaking to Pininfarina

Put me down for 2 sets please, Simon.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

good question! LED's do have polarity, the LEDs would need to be soldered into the board backwards, a simple matter of turning them around the other way

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did I tell you that I won a trophy?

Wouldn't you just hook the unit it up the other way round?

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David L


My greatest fear in life is that when I die my wife will sell my Mini and tools for the price I told her I paid for them!

no, there's a common earth for the parkers and the indicators...

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did I tell you that I won a trophy?

In that case then one set of positive earth when you get around to it please Simon .

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if/when you do them im keen for a set

thanks everyone, I'll keep you posted

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did I tell you that I won a trophy?

my order 4 Please Simon

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Stop Licking the Dog...I Don't Care Who Started It

ill take a pair, or a diagram and list of parts

do you have a rough price set yet?

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1969 Blue Mini K, 1330cc, Weber 45, polished aluminum roll cage, Race seats, 4 point harness, full rewire incorporating 8 fuses, 6 relays and new headlights just needs tyres front shocks and a windscreen til re-register

I haven't set a price - when I do I'll let everyone know before you need to commit

I need to buy the bits to make my 2nd one, so I'll do a parts list when I do that

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did I tell you that I won a trophy?

There's gotta be someone on here that has access to 'mass produce' PCB's???

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