Make a Single Chip Programmable Voice/Audio Recorder Circuit

Nov 30, 2012

The article explains a single chip circuit which can be used for recording short voice clips or any audio clip ranging from 20 to 60 seconds. The incorporated IC APR9600 is a programmable voice recorder chip which facilitates infinite number of recording/erase of audio files in it as per user preference.

High Current Transistor TIP36 - Datasheet, Application Note

Nov 28, 2012

If you are looking for a power transistor able to support currents as high as 25 amps and yet not incorporate the traditional cumbersome TO-3 package, then the TIP36 would certainly impress you.

40 Watt LED Emergency Tubelight Circuit Using 1 Watt 350 mA LEDs

Nov 27, 2012

The article explains a simple yet effective 40 watt LED emergency tube light circuit which can be installed at home for acquiring  uninterruptible illumination at the same time saving a lot of electricity and money.

How to Modify an SMPS Circuit

Nov 26, 2012

SMPS stands for switch mode power supply and it's the modern and most compact/efficient way of acquiring low voltage DC from mains AC source. However making an SMPS at home may not be as simple as making power supply units using traditional iron core transformers. Also getting an SMPS with custom specs may not be that easy, in fact impossible if the voltage/current specs are far away from the regular values.

Solar Inverter/Charger Circuit for Science Project

Nov 23, 2012

The following article explains a simple solar inverter circuit consisting of it's own battery charger and an automatic changeover relay system for switching the battery to the inverter in the absence of solar energy. The circuit was requested by Ms. Swati Ojha.

Using a Fan Dimmer for Controlling LED Tubelight Intensity

Nov 21, 2012

The circuit idea presented in this article can be used for controlling the intensity of many LEDs  through a ceiling fan dimmer switch unit. This circuit was requested by Mr. Joseph who wanted a simple method through which an ordinary home dimmer switch could be integrated with a chain of LEDs for controlling its brightness from zero to max. Let's learn more.

Mains AC Xenon Tube Flasher Circuit

Nov 20, 2012

The article discusses a very simple yet amusing mains operated xenon tube flasher circuit using ordinary electronic components.

3 Watt, 5 Watt LED DC to DC Constant Current Driver Circuit

Nov 18, 2012

The following article provides a simple yet very decent solution for driving powerful LEDs rated at 3 watt or 5 watt. These LEDs are able to produce highly intense and powerful light outputs, however these are extremely vulnerable too with their operating parameter. Let's learn more how to operate these devices very safely  using a simple power supply.

25 Amp Solar Battery Charger Circuit

This circuit is capable of providing as high as 25 Amps of current at any specified voltage between 1.25 V to  30V as per the adjustment of the given pot. The current is constant irrespective of the voltage settings. The circuit can be used for charging batteries in range of 50 to 200 AH.

3 Watt LED Datasheet - Explained in Simple Words

The following article explains the main technical features and specifications of  3 watt white LEDs. Let's learn more regarding their operating parameters and safe-operating limitations.

Making a Cell Phone Controlled Remote Bell Circuit

Nov 14, 2012

The following circuit of a cell phone controlled remote bell can be used for ringing bells or alarm devices using your personal cell phone. The unit incorporates an attached cheap cell phone as the modem for executing the proposed functions.

Converting Ordinary Rice Bulb String Light to LED String Light

Nov 13, 2012

Whether it's during a  festive occasion or for mere decoration purpose, the Chinese rice bulb flashing lights have become  hugely popular nowadays  These can be seen as multiple interlaced wire strings consisting of many different colored minute rice shaped bulbs which produce variety of lighting patterns when switched ON. Though these generate stunningly beautiful illuminations, are not much reliable.

1 Watt LED Driver Using a Cell Phone Charger

Nov 11, 2012

Nowadays probably all of us have a spare cell phone charger lying idle in our cupboards or table wouldn't it be a great idea if we could employ it like a super bright 1 watt LED driver and illuminate our room with white cool moon light.

Accurate Fridge Thermostat Circuit Using a Single IC LM324

Nov 10, 2012

A simple yet effective electronic fridge thermostat circuit has been explained in the following article. The post is based on the request sent to me by Mr.Andy. The proposed idea incorporates just a single IC LM 324 as the main active component. Let's learn more.

Cell Phone Emergency Charger Pack Circuit

Nov 9, 2012

It often happens, our cell phone goes into a low battery condition right in the middle of an important conversation, and even worse it happens while we are travelling or situated in some remote outdoor location where there's no charging facility available. No matter what, this little pack will give your cell phone an immediate refill every time it tends to get flat outdoors.

Automatic Dual Battery Changeover Relay Circuit

Nov 8, 2012

The following article explaining a dual battery changeover relay circuit was requested by Mr.Raja so that it could become possible to switch between his old and new inverter batteries automatically, eliminating manual interventions. Let's read it in details.

Motorcycle Full Wave Shunt Regulator Circuit

Nov 1, 2012

The following post of a full wave motorcycle shunt regulator circuit was requested by Mr.Michael. Let's learn  the circuit functioning in details.

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