Hello, Was wondering if someone knowledgeable would be able to advise me on the best way to proceed with this, I need to extract a signal to power a normal LED that indicates when the Mute has opened on a Receiver. The Receiver has a "Busy" line coming from the Micro that supplies 5V DC when the mute is closed ( Quiet ) and goes to OV when the Audio is open ( Audible ) I don't have any further info on the current available from the micro and am a little dubious about running a small SPDT relay off this signal. I searched the RB site and found the article concerning the "maxtrac cor buffer" which uses a Transistor to invert the logic but am not sure how to apply this to a LED ( 20ma ) and whether the resistor on the Base input would be the right value. If i could do this without risking the health of the micro ( which controls everything on the Board ) i would be very happy.
Any info would be most appreciated, Regards,
