Input Devices

Group assignment:

 

Testing the voltage drop across a potentiometer's wiper, potentiometers are varialbe resistors that can be used for voltage regulation and as position sensors, it have 3 pins, a power, ground and output(wiper)pin, when the knob on the poterntiometer is turned, the wiper changes position on the resistve material inside providing the curent with more or less distance through the resistor thus generating a variable voltage.

To test the potentiometer function I wired its VCC and GND to an Arduino Uno and used a multimeter to measure the voltage between the wiper and ground, at minimum angle of the potentiometer knob the voltage would read 0V and at maximum angle it would read 5V, this variable voltage can be read as an analog signal by one of the ADC(Analog to Digital) pins on the Attiny44, pin number 2(Arduino) is and unused ADC pin in my board so I decided to use it by soldering a jumper cable from it to the wiper(V-out) pin on the potentiometer, the maximum resistance of this potentiometer is 10kOhms