Hi
I'm making some modifications to a circuit and im confused by how the output of the opto has been connected. I want to know if there is a minimum current that needs to be drawn. In the circuit im looking at the output is connected with a 820 ohm resitor between the emitter and ground; this doesn't make any sense to me since it part of a logic circuit feeding a nand gate and shouldn't have to draw anywhere near this much current. Can i change this to a 10K resistor and move it above the collector to invert the signal?
Please see diagram should help to make my question clearer.
Thanks in advance
also opto is PC357N1TJ00F
I'm making some modifications to a circuit and im confused by how the output of the opto has been connected. I want to know if there is a minimum current that needs to be drawn. In the circuit im looking at the output is connected with a 820 ohm resitor between the emitter and ground; this doesn't make any sense to me since it part of a logic circuit feeding a nand gate and shouldn't have to draw anywhere near this much current. Can i change this to a 10K resistor and move it above the collector to invert the signal?
Please see diagram should help to make my question clearer.
Thanks in advance
also opto is PC357N1TJ00F