on 3/3/04 12:30 PM, Mark Benson at [EMAIL PROTECTED] wrote: > > On Mar 1, 2004, at 10:21 pm, Graham Cox wrote: > >> LEDs almost never burn out - unless you stick an AA battery across >> them, that is ;-) >> >> I don't recommend this. Though an LED has a voltage drop of about 1.2V >> (at least red and green ones do), and this is close to an AA battery's >> output, without current limiting it would be very easy to burn out the >> LED even if the battery has only a small amount of excess voltage. You >> MUST have a limiting resistor in there. > > I can confirm Apple's button board has a limiting resistor in series > with the LED (little black dooder at the top of the board above the > LED). > > Still does explain why it doesn't work, in fact it only makes matters > more weird... > > Anyone know the board's pinout and feed voltages?
Check the Mac Gurus site? JEff -- Compact Macs is sponsored by <http://lowendmac.com/>. Support Low End Mac <http://lowendmac.com/lists/support.html> Compact Macs list info: <http://lowendmac.com/lists/compact.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive:<http://www.mail-archive.com/compact.macs%40mail.maclaunch.com/> --------------------------------------------------------------- >The Think Different Store http://www.ThinkDifferentStore.com ---------------------------------------------------------------
