![]() ![]() You can do it with one transistor and 2 resistors, providing you don't need it running at super low current.Ĭ = output, pulled high by a resistor to +v Someone mentioned making an inverter with two transistors. Is it pulled up or down? A simple test with a voltmeter connected to the casio's GND on the powersupply and the 'pedal in' pins would do. ![]() The only problem I can see here is that, with the switch 'open' (pedal pressed) its open circuit. I take it you don't want to use a reed relay? It'll need battery power, so a small little box with the input from the pedal and the output for the keyboard would be needed, but I can't see it being bigger than a box of matches. The switch in the pedal is normally closed, until you depress the pedal, then its open circuit. If I understand your problem correctly, as you stated, it is simply a logic inversion problem.
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