The Big Ear Posted September 8, 2007 Report Share Posted September 8, 2007 I've built a AOUT LC, activated it in the SW, but I only get 0 to +/-5V out.I'm using a +/-15V PSU (Old MOTM PSU)Resistor values are OK...I didn't bother to match the 10K resistors for this one.And now that I'm asking questions, my MIDI out ports 1 & 2 give the same output. I mean, when selecting midi out 1, I also see the led of midi out 2 blinking. Midi out 2 is "available". I must admit I didn't install the 1K (or was it 10k) resistors connected to 5V at the selection pins. Any ideas?Cheers,Tom Quote Link to comment Share on other sites More sharing options...
TK. Posted September 9, 2007 Report Share Posted September 9, 2007 Hi Tom,which voltage do you measure on the positive inputs of the OP amp, is it between 0V and 5V (depending on note or CC value?)IIC modules: the resistors are required so long the pins are not directly tied to Vs or Vd in order to ensure a stable logic level. Otherwise random things can happen (like you've probably noticed)Best Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
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