RC Car under lighting yep, might be a bit strange for bt-tech.. maybe not Any way I've got a 1/10th scale RC car Im wanting to light up from inside Im not sure how im going to do this, thats why im posting here I've tried a 12" cold cathode hooked up to a 9v battary, this failed very bad. It was far too dull. I would prefer if it wasn't power'd by the same battary as the car, and 9v battary(s) would be great. Im wanting to make something like this So ideas please
CCFLs use loads of power (apart from needing the full rated voltage) so battery powering isn't a good way. EL string (or an EL panel) uses a lot less but won't shine much at 9V. LEDs are best bet, as used by your link. You could run several strings of 2 blues or 4 reds in series from a 9V battery (you'll also need some resistors to control the current).
looks like LED's are right for this this, I've no idea about what resistors to use and how many etc tho.
LED calculator A string of 4 reds will be 8V or so, 2 blues will be around 7V. You should keep the current under 15mA.
Hmm dont wanna sound stupid, But I dont know what to do there. 4 red led's will be around 8V so thats 2V each? Diode forward voltage is the voltage of the led, 2V? total n00b who need explaining to.
Forward voltage is the voltage drop of the string - so 7 for a string of 2 blue, and 8 for a string of 4 reds. Supply voltage will be 9V right? Current should be less than 15mA.
