I wrote: >**** Pin 9 is going to be the bottleneck My guess is that this requires an >add-on >circuit that generates a PWM signal. First, I'm going to try it without.
johnsn replied: >Try this. Disconnect (cut) the wire to pin 9 in your Classic. Leave >everything else connected. >Turn on your Classic and see if you have any video. I would guess is you >will not have any video >I think line 9 is looking for a resistor to ground, or a resistor to 5v. >This is just a guess. YOU COULD BLOW UP YOUR MAC DOING THIS. >So the question is.. Do you feel lucky? >Maybe if you could measure the voltage at pin 9 with the brightness set >high and low. By the description, my guess was that pin 9 carries a PWM-signal (Pulse-width-modulated; a square wavewith varrying block width) to control brightness. I plan to put a 'scope on it in a working Classic. In the end it should turn into an analog signal somewhere on the analog board, I hope. That's what I'm looking for too, so that I can put a resistor there and bypass the PWM--trouble on pin 9. I'll keep you posted indeed :) �mart -- 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> The FAQ: <http://macfaq.org/> --> 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/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
