Hi,
I was wondering if someone could help me with the design of a circuit for the following scenario.
I have a momentary switch connected to a 3v signal. In addition, I have an IC with a pin that needs to be connected to ground via a resistor (it reads the resistance value, so the resistance of the line needs to be known). Now, when the switch is open, I need the IC pin to connect to ground via a potentiometer, however when the switch is closed, I need the IC pin to connect to ground via a fixed value resistor.
Can anyone suggest the best way of going about this?
Many thanks
Matt
I was wondering if someone could help me with the design of a circuit for the following scenario.
I have a momentary switch connected to a 3v signal. In addition, I have an IC with a pin that needs to be connected to ground via a resistor (it reads the resistance value, so the resistance of the line needs to be known). Now, when the switch is open, I need the IC pin to connect to ground via a potentiometer, however when the switch is closed, I need the IC pin to connect to ground via a fixed value resistor.
Can anyone suggest the best way of going about this?
Many thanks
Matt