How would I wire a light-emitting device (not necessarily an LED) in the following schematic to indicate the input (High to run) is high? Would it be in parallel with R4? Before or after R3?
Thanks, Russell McMahon, for making the schematic for me.
lightmicrocontroller
How would I wire a light-emitting device (not necessarily an LED) in the following schematic to indicate the input (High to run) is high? Would it be in parallel with R4? Before or after R3?
Thanks, Russell McMahon, for making the schematic for me.
Best Answer
There are various places.
The next step is 'after' Q2, but that has a switch in parellel, so your light will light up if that is pressed too. You could extend the circuit with a resistor or a few diodes to prevent this.
Next is between the collector of Q1 and ground. Like the collector of Q1, it is also activated when the switch is pressed (and prevent this parallel activation is a bit more involved), so maybe that is not what you want.
One additional note: if you use a LED on any of those places, don't forget the series resistor.