How to Calculate and Match Solar Panel, Inverter and Battery Charger Specifications for Acquring Optimal Results

May 30, 2013

The following post explains through calculations how to select and evaluate the right solar panel, inverter and charger controller combinations for acquiring optimal results in the form of free electricity.

Car Speed Limit Warning Indicator Circuit

The following post describes a simple yet useful car speed limit warning indicator circuit which can be used in vehicles for getting an instant indication of a possible over speed limit conditions. The idea was requested by Mr. Abu-Hafss.

High Current Mosfet IRFP2907 for Wind Turbine Applications - Datasheet, Application Note

May 28, 2013

The post explains the main features of high current N-Channel mosfet IRFP2907 which is rated to handle up to a staggering 209 amps of continuous current at a reasonably massive 75 volts.

Low Battery Indicator Circuit Using Two Transistors Only

May 26, 2013

The following post describes a simple low battery indicator circuit by using just two inexpensive NPN transistors. The main feature of this circuit is its very low stand by current consumption.

Long Range Transmitter Circuit - 2 to 5 Km Range

May 23, 2013

The proposed long range transmitter circuit really is very steady, harmonic free design which you can use with standard fm frequencies between 88 and 108 MHz.

Make this Stereo FM Transmitter using IC BA1404

May 22, 2013

The following posts explains a simpe to build FM stereo transmitter circuit using IC BA1404.

How to Recharge Discarded Lead Acid Batteries Using Bedinis Generator Mechanism

Lead acid batteries can sometimes be a problem to get rid of. They can also be high priced to upgrade. In case discarded in the wrong way, they have a tendency to finish up in the land fill up or even rotting of in your junkyard.

Simple Low Battery Indicator Circuit Using IC 555

May 21, 2013

The article explains a simple low battery indicator circuit using the IC 555 and a few resistors only.

Grid Mains to Generator Changeover Relay Circuit

May 20, 2013

The post explains a simple configuration which can be used as a automatic changeover circuit for switching AC grid mains to generator mains, during power failures or outages.

Full Bridge 1 KVA Inverter Circuit Using 4 N-Channel Mosfets

The following post shows how a full bridge 1 KVA inverter circuit can be built using 4 N-channel mosfets, without incorporating complicated high side driver networks or chips.

Make this Car Air Ionizer Circuit

May 16, 2013

The post discusses the construction of a car air ionizer circuit which can be used for cleansing the atmosphere of car interior from smoke, pollution, dust particles, bad odor, pollen particles etc. The circuit was requested by Mr. Edalcor Zuproc.

How to Connect 5mm LEDs to a 3.7V Li-Ion Cell

May 13, 2013

The article explains regarding how to connect and illuminate a few 5mm LEDs using a 3.7V Li-Ion cell, normally used in cell phones.

55V 110A N-Channel Mosfet IRF3205 Datasheet

The following post explains the main features of mosfet IRF3205 which is fundamentally rated with drain current at a massive 110 Amps, and voltage ranging up to 55V, ideally suitable for inverter, motor control, choppers, and converter applications.

Variable Surge Free High Current Transformerless Power Supply Circuit

May 11, 2013

The following post discusses a simple transformerless power supply circuit whose output can be varied from zero to the maximum specified voltage level. The design also ensures the availability of relatively high currents, and protection against switch ON surge currents. Designed by "Swagatam".

Cree XLamp XM-L LED Datasheet - Highest Performance White LED

May 8, 2013

The XLamp XM-LED can be considered as the highest performing, single die solid state LED module which is able to produce lights at ultra bright intensities.

Car Head Lamp Fader Circuit - Breathing Effect Generator

May 7, 2013

The proposed circuit of a modified car head lamp fader, "breather" circuit generates a slow flashing effect over the head lamps every time the lamps are switched OFF. The "breathing effect" continues for a certain predetermined period after which the process automatically shuts off. The circuit was requested by Mr. Ray.

Timer/Oscillator Circuit for Exhaust Fans

May 6, 2013

The following post describes a simple timer oscillator circuit which can be used for keeping an exhaust fan alternately switched ON/OFF as per a fixed predetermined period. The circuit was requested by Mr. Anshuman.

Car Turn Signal Flasher Circuit with Lamp Malfunction Indicator

May 5, 2013

The post discusses an automotive/car turn signal indicator circuit idea with a built-in load malfunction indicator, meaning an additional LED lamp fitted on the dashboard which would warn if any of the side indicators went bad or fused. The idea was researched and requested by Mr. Abu-Hafss.

Make this Simple Digital Voltmeter Circuit Using IC L7107

May 2, 2013

The post explains a very simple digital panel type voltmeter circuit using a single IC L7107 and a few other ordinary components. The circuit is able to measure voltages right up to 2000 AC/DC V.

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