With the help of this article u can easily make 0-30V 0-10A Regulated Variable / Adjustable Power Supply Circuit at home.Every lab needs to be equipped with essential equipment. Out of all I would say power supply is most important since it powers up the projects. 

Batteries, DC adapters can do fine job but as demand grows and project gets bigger a professional and adjustable power supply becomes a necessity. 

To cater that I have designed an adjustable 0-30V 0-10A regulated variable / adjustable power supply Circuit with a variable output from 0V to 30V and adjustable current limiting from 0A to 10A. 

This is the Best Variable power supply Circuit Diagram. You can increase its output ampere just add more TIP3055 Transistor in parallel 

0-30V 0-10A Regulated Variable / Adjustable Power Supply Circuit Diagram

0-30V 0-10A Regulated Variable / Adjustable Power Supply Circuit​
Click Here To Buy
Automatic Battery Charger Circuit Diagram

This battery charger circuit provides the Automatic cut off the facility when the battery gets fully charged.Before the use of this circuit, you need to adjust the Cut off voltage range for the auto cut.This adjustment is done by the 10k preset, and a multimeter connected with the output terminals that go to the battery.  Continue  Reading….

Simple Circuit Diagram

0-30V 0-10A Regulated Variable / Adjustable Power Supply Circuit​

Parts List for Diy Bench Power Supply

  • 1x LM 317 Regulator Integrated
  • 2 x .1uf Capacitor
  • 1 x 5K Potentiometer
  • 1 x 10K Potentiometer
  • 1 x 220R Resistor
  • 1 x 1K Resistor
  • 1 x 5mm LED
  • 2 x 0.10R to 1R 5W Resistor
  • 1 x 1000uF 35V Capacitor
  • 1 x BD139 Transistor
  • 2 x TIP3055 Power Transistor
  • 2 x Aluminum Heatsink

Temperature Controlled Fan Circuit

This simple temperature controlled DC fan circuit can be used to control any 5volt DC fan by activating it on a preset temperature. You can use this circuit in many electronic projects, which require a cooling fan. The circuit is very simple.
The BD139 transistor is working as a switch here. When the 10K NTC thermistor will receive heat then its resistance will start decreasing and on a preset level the transistor BD139 will become switch ON and activates the 12 volt DC fan or motor. 
The 50K variable resistor is used to set the level of temperature or heat on which you want to switch ON the transistor.
The transistor will dissipate heat during operation therefore it is important to add some distance between the thermistor and transistor or the circuit will not work properly. Also use a suitable heatsink with the transistor.
temperature controlled fan circuit

PCB Layout for Power Supply Circuit

bench power supply pcb layout

In this project, I will show you how to design a simple Battery Level Indicator Circuit using easily available components. Battery level indicator indicates the status of the battery just by glowing LED’s. This article explains you how Continue Reading…

Final Circuit Diagram With Volt and Ampere Meter

Bench Power Supply/Battery Charger

Watch Video:- How to Make Variable Power Supply Circuit

Watch Video for 0-30V 0-10A Regulated Variable / Adjustable Power Supply Circuit