# High Current Adjustable Power Supply Circuit using LM317

Variable power supplies are available in different ranges but they provide very low current of one or two amperes, they can’t drive high power devices like motor or high power lamps.So to get through such problems I introduce a high current variable voltage power supply circuit which can drive 10A of load, the current handling…

# How to Make a Simple Boost Converter with 555 Timer?

We may come across many circumstances where we need 12V from a 5V (as from USB ports which only provide 5V), but it may not be sufficient to drive all the circuits. To face such situations we are introducing a dc to dc boost converter circuit which can generate 12 volt from 5 volt. Today boost…

# Variable DC power supply schematic using LM317 voltage regulator

Variable voltage power supply is essential for any electronic hobbyist to begin their electronics lessons. For different applications you may need different voltages. So it becomes impossible to use multiple fixed power supplies all the time.Also this variable power supply circuit ensures the protection of other circuit parts from voltage fluctuations. So in this article…

# Bridge rectifier regulated lab power supply circuit schematics

A good regulated AC to DC power supply circuit is essential for any electronic hobbyists and electronic students to do thier electronics hobby projects. Also a bridge rectifier power supply is one of the introductory circuits for beginners. Firstly we need to know what is a bridge rectifier? A rectifier circuit employs the conversion of AC voltage to…

# Transformer less AC to DC power supply circuit using dropping capacitor

Production of low voltage DC power supply from AC power is the most important problem faced by many electronics developers and hobbyists. The straight forward technique is the use of a step down transformer to reduce the 230 V or 110V AC to a preferred level of low voltage AC. But i-St@r comes with the most…

# Regulated dual power supply circuit from single battery source

How to create dual power supply unit using single battery for your lab prupose? Dual voltage power supplies are required particularly for op amp experiments and some of the instrumentation amplifiers. Some low power audio pre amplifiers also uses dual voltage supply. Here is a simple dual power supply schematic capable of producing +9V, 0V…

# Regulated voltage dual power supply circuit: +Vcc, –Vcc & Ground

Dual power supplies or dual power supply units are the most common equipment for an electronics hobbyist. It gives positive polarity, negative polarity and ground potential. Some Op Amps need dual power source that is +Vcc and –Vcc (Positive and Negative polarity). This article explains how to construct simple regulated dual power supply circuit with…