Chris W

Yes, the (completely non-technical) guy who bought it was sceptical at first about all the gadgets but soon realised how useful they are. I offered to restore the car to au naturel but he decided he wanted to keep the gadgets in the end. He used to own a Caterham about 20 years ago (for 3 years). This one will become his main car and he expects to put on 40,000 over the next 2 years (it only has 7K at the moment). Poor thing!! He went for it because of low mileage, SV and one owner primarily. Saw it on Pistonheads. Chris 2003 1.8K SV 140hp see it here

Hi Zak Thanks for your wishes. I'm buying a boat instead. I've already taken over that forum on the electrics!!!!!!!!!!!!!!! Stay in touch Chris 2003 1.8K SV 140hp see it here

Thanks Ozzy 2003 1.8K SV 140hp see it here

Now Sold! 2003 1.8K SV 140hp see it here

PRICE REDUCED 2003 1.8K SV 140hp see it here

Hi Paul No plans at the moment unfortunately. It's not economical in either time or money to make just one off. cheers Chris 2003 1.8K SV 140hp see it here

Ah... that's make sense now Tom. cheers Chris 2003 1.8K SV 140hp see it here

Price reduced. See original post above and on pistonheads 2003 1.8K SV 140hp see it here Edited by - Chris W on 28 Sep 2006 09:56:16

Hi Tom The way it's drawn is not the way you describe its working. When the ECU grounds, the transistor will switch OFF and therefore the LED will extinguish. If it is working the other way round, you must have a PNP transistor rather than the NPN drawn. ie: an NTE 383 rather than an NTE 382. As it's drawn, the LED will be ON all the time that the ECU switch is OPEN, ie: BELOW the trigger point revs. Chris 2003 1.8K SV 140hp see it here

Tom There must be an error on the resistor values on your drawing as it shouldn't work as drawn (ignoring the reversed LED). When the ECU switches to ground, the resistor chain R3/R4 will create a voltage of only about 0.5 volts at the base of the transistor. This is not enough to switch the transistor ON. Even if in practice the supply voltage is closer to 14v rather than 12v (due to the alternator)the base voltage will be only marginally higher. The voltage at the emitter of the transistor will therefore be at virtually earth potential so no current will flow through R2 and the LED will not illuminate. I suspect that R3 is 1.2K (rather than 12K) which would create an emitter voltage of about 2.8v which would give an emitter current of about 3mA. Chris 2003 1.8K SV 140hp see it here

I can soon take the extras off if someone doesn't want them. Chris 2003 1.8K SV 140hp see it here

Anyone want to make a sensible offer? Chris 2003 1.8K SV 140hp see it here

GJT - no probs. I didn't think anything of the kind 2003 1.8K SV 140hp see it here

Thanks Shaun 2003 1.8K SV 140hp see it here

Suggestions please guys. Where's the best place to advertise this to get a timely sale? Cheers Chris 2003 1.8K SV 140hp see it here