How to Make Lab Bench Variable Power Supply DIY

Introduction

A lab bench variable power supply with voltage and ampere controls is a sophisticated piece of electrical equipment that is designed to provide a highly customized and accurate supply of electrical power to lab equipment. It has a wide range of output voltages, typically from 0-30V or higher, and can deliver a current between 0-5A or more. The voltage and current can be easily and precisely regulated using the controls provided on the device.

A laboratory bench power supply is an essential tool for any electronics enthusiast or professional. It is used to provide regulated power to various electronic devices and circuits. If you’re a DIY enthusiast, building your own lab bench power supply can be a fun and rewarding project. In this article, we will guide you step-by-step on how to make a lab bench variable power supply using LM317, LM358, and 2SD1047 transistor.

How to Make Lab Bench Variable Power Supply — **Lab Bench Variable Power Supply**

Circuit Diagram of Lab Bench Variable Power Supply

This project can be designed using a few basic components. The circuit diagram of this project is shown below.

How to Make Lab Bench Variable Power Supply Circuit Diagram — **Lab Bench Variable Power Supply Circuit Diagram**

How to Make Lab Bench Variable Power Supply Schematic — **Lab Bench Variable Power Supply Schematic**

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Components List of Lab Bench Variable Power Supply

Following is the list of all components used in this project:

1X LM317 IC
1X LM358 IC
1X 2SD1047 TRANSISTOR
1X 1N4148 DIODES
2X LED
1X 1000uF CAPACITOR
1X 5K POTENTIOMETERS
1X 0.1 OHM RESISTOR
1X 220 OHM RESISTOR
1X 1K RESISTOR
1X 10K RESISTOR
1X 470K RESISTOR
2X 2 PIN TERMINAL BLOCKS
1X PERF BOARD
JUMPER WIRES

Gerber Files

Explanation of Lab Bench Variable Power Supply

The power supply is typically built with a robust casing, and the front panel has clear displays to show the output voltage and current. It may also have an on/off switch, a fuse, protection circuitry, and easy-to-use binding posts or banana jacks to connect the equipment requiring power.

A common application of a bench variable power supply is to power electronic circuits, test instruments, and other electrical devices in a laboratory, research, or production environment. The voltage and ampere controls allow the user to adjust the power supply to meet the specific needs of the equipment being used, and the high level of accuracy and stability ensures reliable operation of the equipment over long periods.

Overall, a variable power supply with voltage and ampere controls is a valuable piece of equipment that provides precise and customizable electrical power to varying types of lab equipment. It is necessary for a laboratory environment where precision, versatility, and safety are paramount in the functioning of the equipment.

LM317 is a voltage regulator IC that can be used to generate a regulated output voltage from an input voltage. It has adjustable output voltage and can provide up to 1.5A of output current.

LM358 is an operational amplifier IC that can be used in various analog circuits such as amplifiers, oscillators, and filters. It has two internally compensated operational amplifiers with high voltage gain and low input bias current.

2SD1047 is a high-powered NPN transistor that can be used in power amplifiers, audio amplifiers, and voltage regulators. It has a maximum collector current of 15A and a maximum power dissipation of 150W.

Conclusion

Building your own lab bench variable power supply using LM317, LM358, and 2sd1047 is a great way to add a custom power supply solution to your electronics workshop. By following the circuit layout and the schematic diagram, you can make your own variable power supply with ease. The power supply will have variable voltage output, and the maximum current can be limited using a 220 Ohm resistor. With a power supply like this, you can work on various electronic projects with greater ease and flexibility.