Variable Power Supply 10A LM723

Friday, September 18th, 2015 - Power Supply Circuit

Variable power supply 10A LM723 is made with the LM723 voltage regulator has a linear DC output of +3 volts to +8 volts. The circuit variable power supply 10A LM723 is built using the IC LM723 voltage regulator and current amplifier in the form of two transistors mounted 2N3055 parallel. The circuit variable power supply 10A LM723 can be used to provide a voltage source for electronic devices with stable. Power supply circuit schematic and component list to create a variable power supply 10A LM723 can be seen in the following figure.

The circuit Of Variable Power Supply 10A LM723

Variable Power Supply 10A LM723

The circuit variable power supply 10A LM723 above has a voltage that can be set via a variable voltage regulator LM723. The output voltage level above the power supply is controlled by IC LM723 through 20 Kohm potentiometers.

Component Of Variable Power Supply 10A LM723

Basically the circuit 10A variable power supply LM723 above consists of several sections as follows.

Step-down section, this section serves to lower the 220V AC voltage into an AC voltage of 18V with a current capacity of 15A. Components used as a step-down transformer 15A is the output voltage of 18 volts.

Rectifier section, this section serves rectify the AC voltage of 18 volts to 18 volts DC voltage, this section was prepared by a diode bridge 20-50A and 4 pieces of electrolytic capacitors (Elco) 10000uF.

Part voltage regulators, in part serves to regulate the output voltage level that can be set from + 3 VDC to + 18 VDC via a potentiometer. The main component is a voltage regulator IC LM723, then 20 Kohm potentiometer serves to set the output voltage level.

Current amplifier section, this section serves to strengthen the power supply output currents up to 10A. The components used to amplify the currents are 2 pieces of 2N3055 transistors mounted in parallel as shown in the schematic circuit variable power supply 10A LM723 above.

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