The following schematic is an adjustable regulated power supply diagram which uses LM317 regulator. The output provided by this circuit range between 1.25V DC to 35V DC. This circuit also delivers current up to 1.5 Ampere. In below figure, three different LM317 are shown. It provides different current ampere and power. Based on your need, you can use the minimum current for the regulator 100mA and the maximum value is 1.5mA. To reduce the regulator heat, heatsink is needed.