Variable Power Supply with Adjustable Current Limit

Variable power supply with current limit

This circuit variable power supply with adjustable current limit using three terminal adjustable regulator LM117 which is used to regulate current and the voltage limits. Variable power supply input range is between 32 V to 40 VDC and can provide outputs up to 25 VDC and provide currents up to 1.2 A

Dioda D2 and D3 and Q2 are added to allow adjustment of output voltage to 0 volts. D1 protect both LM117 during an input short circuit

Parts list :
R1 : 240
VR1 : 1K
VR 2 : 5K
C1 : 0.1uF
C2 : 1uF Tantalum
D1 : 1N4002
D2..D6 : 1N4001
Q1 : 2N3822
Q2 : 2N5640
IC1, IC2 : LM117

Power supply is an electronic device that supplies electric energy to an electrical load. The primary function of a power supply is to convert one form of electrical energy to another and, as a result, power supplies are sometimes referred to as electric power converters. Some power supplies are discrete, stand-alone devices, whereas others are built into larger devices along with their loads. Examples of the latter include power supplies found in desktop computers and consumer electronics devices.


Tags: adjustable current limit power supply power supply with current limit variable power supply Variable power supply with adjustable current limit

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