Automatic Lead Acid Battery Charger Circuit Using IC 555

Mar 30, 2013

The following article explains a simple, versatile automatic lead acid battery charger circuit. The circuit will allow you to charge all types of lead acid battery right from a 1 AH to a 1000 AH battery.

Laser Diode Driver Circuit - Current Controlled

Mar 29, 2013

The circuit of a laser pointer power supply explained in the following post was requested by Mr. Steven Chiverton (, who himself is an intense electronic hobbyist and researcher.

Simple DC UPS Circuit for Modem/Router

Mar 27, 2013

The following explained circuit of a DC UPS can be used for providing back up power to modems or routers during mains failures, so that the  broadband/WiFi connection never gets interrupted. The idea was requested by Mr. Galive.

Energy Saving Automatic LED Light Controller Circuit

Mar 26, 2013

The post discusses an interesting energy saving lighting circuit design which switches ON only when it is logically required thus helps to save electricity, and also increases the working life of the whole system.

Simplest Automatic LED Solar Light Circuit - Solar Garden Light

Mar 23, 2013

A very simple automatic solar light system ca be built using some LEDs, a rechargeable battery and a small solar panel. The system automatically switches ON the lamps at dusk and switches them OFF at dawn.

Simplest, Safest Li-Ion Battery Charger Circuit

Mar 22, 2013

Li-Ion cells are probably the most complex when it comes to charging them, because these cells are quite vulnerable to overcharging, and tend to get hot at unfavorable conditions. The following post explains a simple yet a safe way of charging a Li-ion cell which can be easily constructed at home.

Incubator Thermostat Circuit with Hysteresis Control

Mar 21, 2013

The following post describes a simple yet accurate adjustable incubator temperature controller circuit which has a special hysteresis control feature. The idea was requested by Dodz, let's know more.

Sequential Bar Graph Turn Light Indicator Circuit for Car

Mar 20, 2013

The article illustrates a simple yet innovative, fancy car turn signal light circuit which produces a rising bar graph sequence effect when switched ON. The circuit idea was requested by Mr. +Bruce Lowry. Let's learn more.

Make this DRL (Day Time Running Light) Circuit for Your Car

Mar 16, 2013

The presented circuit of a DRL or a Day Time Running Light was requested by Mr.Senthil. Let's understand the complete design.

How to Design an Inverter - Basic Circuit Tutorial

Mar 15, 2013

The post explains the fundamental tips and theories which may be useful for the newcomers while designing or dealing with basic inverter concepts. Let's learn more.

Simple, Reliable Infrared (IR) Remote Transmitter/Receiver Circuit

Mar 11, 2013

Ordinary IR remote control circuits have one big drawback, they easily get disturbed by stray external frequencies, and thus produce spurious toggling of the load. The circuit discussed here eliminates this issue, and detects only the specified IR frequency from the given remote transmitter unit.

How to Convert 12V DC to 220V AC Using IC555 Boost Circuit

Mar 10, 2013

The article explains a very simple method of acquiring 220V AC from a 12v DC source. The idea utilizes inductor/oscillator based boost topology with the help of the IC 555.

LM567 Tone Decoder IC Features, and Parameters Explained

Mar 9, 2013

The post discuses the main specifications and working principle of the IC LM567, which is a precise phase-locked loop with synchronous AM lock detection and power output device.

Simple DC to DC High Current Voltage Doubler Circuit - 3 to 10 Amps

Mar 8, 2013

The post explains a voltage doubler circuit which will almost double the voltage that's been applied at the input (up to 15V max), and also it becomes specifically useful since it allows higher current loads to be used at the output.

Charging a Laptop from a Car Battery - DC Laptop Charger Circuit

Mar 7, 2013

The following post explains a simple circuit which may be incorporated for charging a laptop while driving in car or some other vehicle. The circuit runs without incorporating an inverter or inductors in its configuration Let's learn more.

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