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A bench power supply is extremely useful for electronics hobbyists, but they can be expensive when purchased from the market. In this Instructable, I will show you, how to make a mini-lab power supply with a limited budget. It is a great DIY project for beginners as well as anyone interested in Electronics.
The Power Supply is based on XL4015 DC-DC buck converter module. This module can provide an adjustable output-voltage from 1.4V, up to the input voltage and current output from 0mA to 5A. It only requires only a DC power supply with a voltage range between 12-30V. Here I have used a 24V/3A DC adapter.
The inspiration for this project is from Chordless Lab Power Supply
The power supply can be used for the following purposes:
1. Variable Power Supply
2. Battery Charger
3. Constant Current LED Driver
4. Solar Charger Controller

1. Input voltage range:5-36VDC
2. Output voltage range:1.25-32VDC adjustable
3. Output current: 0-5A Output power: 75W
4. Output ripple: 50mV (max)
5. In-built thermal shutdown and short circuit protection

Components Used:
1. XL4015 Buck Converter
2. Volt-Amp LED display
3. 2 x 10k Precision Potentiometer
4. 2 x Binding Posts
5. DC Jack (5.5mm x 2.1mm)
6. 2 x Rocker switch
7. Fuse Holder
8. Fuse
9. Heatshrink
10. 20AWG Wires
11. Heatshrink Tube
12. 12-30V DC Power supply

Tools Used:
1. Soldering Iron
2. Wire Cutter / Stripper
3. 3D printer
4. Hot Air Blower”

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