LM317 Adjustable Regulated DC Power Supply

This basic variable regulated power supply using LM317 is ideal for student learning basic regulator circuit. It can use DC or AC input feed into full bridge rectifier , LM317 and varies the output voltage using potentiometer. With load and input short circuit protection features.

Specifications

• PCB Dimensions:69*50mm
• INPUT> DC :5-35Vdc or AC :6-25Vac
• DC OUT:1.25-30V
• Max. Current:1A

Components Listing:

• R1 = 200Ω
• R2 = 15
• VR1 = 5K Potentiometer
• D1- D5 = 1N4007
• D6 = LED 3mm Red
• C1,C4 = 104
• C2 = 2200uF (50V)
• C3 = 10uF (25V)
• C5 = 470uF (50V)
• Q1 = Transistor 9014
• U1 = LM317T with HEATSINK
• J1 = KF-301-2P terminal block
• J2 = DC Plug DC-5.5*2.1
• J3, J4 = 2.54 2P (Vertical connector)
• P1, P2 = 4mm Banana Jack
• LED Spacer x1
• Standoff and nuts x4, M3 screw x1
• Knob x1
• Banana to crocodile wire x1
• PCB 69*50mm x1

Schematic diagram, theory of operation and assembly instruction is included.

*Note: This is a DIY kit and require to solder components to PCB