Guest Anonymous Posted June 26, 2001 Share Posted June 26, 2001 What do they use for ignition on those nascar cars? Magneto or electronic? Regards, Lone Quote Link to comment Share on other sites More sharing options...
Guest Night_rider_383 Posted July 1, 2001 Share Posted July 1, 2001 Lone... I'm pretty sure its electronic. I know i have seen msd boxes on them things Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted July 2, 2001 Share Posted July 2, 2001 I'm pretty sure the 7812 needs at least 15 or 18 volts coming in to get 12v coming out. That makes it pretty useless for automotive use. Maxim makes alot of regulator / dc-dc converter chips though, and they will usually send out a free sample or two if you ask for it. I would think if you got a regulator that would handle a moderate amount of current, you could probably run all of your autometer guages directly off of it. Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted July 2, 2001 Share Posted July 2, 2001 FWIW, the dropout on a 7812 is 2.5V, so you could regulate 12V from 14.5 or higher, which is close to charging voltage. http://www.national.com/ds/LM/LM341.pdf I'm not sure you will get much more accuracy out of the gauges, especially since automotive regulators seem fairly good - it seems the only time I see voltage drop much is with lights and wipers on. You can fine tune the sensors with a small resistor wired in series, but I would think the gauges are intended to be used with a supply voltage of 14V-15V. Quote Link to comment Share on other sites More sharing options...
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