Rick, I went 510 ohm (not k) 1/4 W to be on the safe side. It's a 6000 mcd high intensity white LED. Normal green ones are nowhere near bright enough. Though I believe you can get some high intensity ones now. I used it on my new combined oil pressure/temp gauge. It came without any coloured filter to make the light green and was extremely dim with the standard 2w so I tried 4w and it was OK (for light intensity) but far too hot for the plastic filter I made from office index file tabs ( just about the right shade of green, cheap and available). I stuck my LED torch (flashlight I believe you call it) round the back and that looked not bad, hence why I went this way.
LED is 3.6v, 20 mA nominal so I thought - lights are only on when the engine is running - so it's at the charging voltage, hence I want to drop about 10V - 11V -> 500 ohm- 550 ohm. 11v, 20mA ->220 mw hence the 1/4W rating and it's also small enough to fit inside the old bulb base. It cames out pretty neat for a first try. I was asking about the valve cleaner, since like you am am worried about the side-effects. Alan -----Original Message----- From: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> on behalf of "Rick Gregory" <[EMAIL PROTECTED]> Sent: Fri, 9 Aug 2002 11:13:20 -0600 To: "'[EMAIL PROTECTED]'" <[EMAIL PROTECTED]>, "'[EMAIL PROTECTED]'" <[EMAIL PROTECTED]> Subject: RE: Where did everyone go ? Is that a standard LED & 470(K?) ohm resistor, or did you use something else? What did you use it for - an "on" indicator or something else? I have been thinking it would be nice to have a pair of these for left & right turn signal indicators, & maybe use the existing one for something else, or not at all. Never used the valve cleaner products - always been to scared to mess with things like that for fear of bad side-effects. I would love to hear of an objective review and ratings of these kinds of products from serious and thorough evaluations. Rick Gregory '74 Spitfire FM15447UO Great Falls, Montana http://ww.spitfire.gregory.net /// [EMAIL PROTECTED] mailing list /// Send admin requests to [EMAIL PROTECTED] /// or try http://www.team.net/cgi-bin/majorcool /// Archives at http://www.team.net/archive /// Send list postings to [EMAIL PROTECTED] /// Edit your replies! If they include this trailer, they will NOT be sent.
