Does anyone know of an easy way of calculating the value of resistors (R1,VR1,R2 in the photo) to obtain a range of voltages.
In other words... I have a voltage source of 12vDC and want to calculate the resistor values to obtain output voltages at the wiper of a potentiometer of:
1. voltage output of between 2.0 volts and 5.5 volts
(2.0 volts when the potentiometer is close to lowest setting / 5.5 volts when the potentiometer is close to highest setting).
2. voltage output of between 3.5 volts and 4.5 volts
(3.5 volts when the potentiometer is close to lowest setting / 4.5 volts when the potentiometer is close to highest setting).
I want the potentiometer to be as sensitive as possible to obtain 1/10th volt between the ranges. Eg. as in 1 above..2.0v, 2.1v, 2.2v, 2.3v etc.
In other words... I have a voltage source of 12vDC and want to calculate the resistor values to obtain output voltages at the wiper of a potentiometer of:
1. voltage output of between 2.0 volts and 5.5 volts
(2.0 volts when the potentiometer is close to lowest setting / 5.5 volts when the potentiometer is close to highest setting).
2. voltage output of between 3.5 volts and 4.5 volts
(3.5 volts when the potentiometer is close to lowest setting / 4.5 volts when the potentiometer is close to highest setting).
I want the potentiometer to be as sensitive as possible to obtain 1/10th volt between the ranges. Eg. as in 1 above..2.0v, 2.1v, 2.2v, 2.3v etc.
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