Rednas Posted December 3, 2004 Report Share Posted December 3, 2004 HiI try to build the midimerger with the old PIC. I got all the stuff and soldered most part but i tried to build it without external powersupply.What i do is I use the power on the cable from one of my keyboards. The other is still isolated with an optocoupler (6N138). This should work fine.The problem is I connect the data cable directly to the PIC. But normally the databit is 0 if data is sent. This will light up the led in the optocoupler, so the optocoupling works and gives a 1 to pic.Is this true?And should i just set either an inverter or an optocoupler between data and PIC to solve this problem.Thnx for answering.yoursRednas Quote Link to comment Share on other sites More sharing options...
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