Circuit Diagram LM317 Voltage regulator IC It’s an adjustable three-terminal voltage regulator IC, with a high output current value of 1.5A. The LM317 IC helps in current limiting, thermal overload ...

Variable resistor – 10k LED You can see the connections in the IR sensor circuit diagram. Photo diode is connected in reverse bias, inverting end of LM358 (PIN 2) is connected to the variable resistor ...

This circuit can be used to determine the relationship between the current and the voltage for different components. The variable resistor can be adjusted in order to give a range of voltages.