In this tutorial we will show you how to get the variable regulated Voltage from the LM317 IC. With a small circuitry attached with LM317 we can get variable voltage up to 37v with 1.5A max current.

Resistor 100, 10k, 330 ohm; 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 ...

The variable resistor can be adjusted in order to give a range of voltages. The current can be recorded for each of the voltages and a graph of current against voltage plotted. Current-voltage graphs ...