dylan@cs.washington.edu (Dylan McNamee) (10/31/89)
I would like to add a coulple of status lights to my CD player. I have located pins where the Track Lost and Drop Out Detector signals are. I would like to hook up an LED to these signals, but I don't want to add any noise to the circuitry. (I was thinking of using a battery to power the LED.) Any ideas of how to do this? I've always wanted to know how many times my CD player was actually interpolating data... Send me replies, if you wish, and I'll summarize the ideas, if there is interest. dylan dylan@cs.washington.edu
dag@hp-lsd.COS.HP.COM (David Geiser) (11/02/89)
Quick and Dirty: Let the outputs drive the base of a small transistor which will turn on the LED. You might want to add a capacitor time delay in the base circuit to slow down the rate at which the transitor is turned off after it is turned on. Otherwise, the pulses may be too narrow to see. Hmmm, looks like I've just described a one-shot (retriggerable would be nice).