Hi! Could someone look at this new circuit I have? It was built from this original circuit as reference. See attached 2 pics.
The jack takes a synth gate which is just an off/on DC signal. The timing is about what a key held down on a piano or synthesizer would be. The voltage amount just depends on which instrument model you would be using. Typically it is 5V, but other common gates are from 2V to 10V. I would like the circuit to be protected from -30V to +30V though, because these could be accidentally plugged in with synthesizers. The output of this circuit is to go into a Teensy 3.1 micro-controller just as a off/on signal.
My specific question is about my new jack. It is not a switched jack like the original. The new circuit is losing that ground connection from the left side of the R12 resistor. What would happen to my new circuit with nothing plugged into the jack and the left hand of the R1 resistor just floating?
Thanks for your time!
The jack takes a synth gate which is just an off/on DC signal. The timing is about what a key held down on a piano or synthesizer would be. The voltage amount just depends on which instrument model you would be using. Typically it is 5V, but other common gates are from 2V to 10V. I would like the circuit to be protected from -30V to +30V though, because these could be accidentally plugged in with synthesizers. The output of this circuit is to go into a Teensy 3.1 micro-controller just as a off/on signal.
My specific question is about my new jack. It is not a switched jack like the original. The new circuit is losing that ground connection from the left side of the R12 resistor. What would happen to my new circuit with nothing plugged into the jack and the left hand of the R1 resistor just floating?
Thanks for your time!