Insect Wing Signal Detector Circuit

Sep 30, 2014

The article discusses a VLF receiver circuit used for detecting insect wing beat signals, the idea was investigated and built by Mr. Steven Chiverton.

Free 200 Volts Just Above your Head

Lightning in skies is the phenomenon which proves beyond doubt that free electrical energy could be there in abundant quantities all around us.

Cellphone Display Light Triggered Remote Control Circuit

Sep 29, 2014

The post explains a cell phone remote control circuit using the light from its display. The idea was requested by  Dondon.

How to Test a MOV (Metal Oxide Varistor) Surge Protector Device

Sep 26, 2014

The article discusses a set up for testing MOVs which are special devices specified for absorbing instantaneous high surge currents that may accidentally occur in our mains electrical lines. The idea was requested by Mr. Kevin

Water Level Controller Circuit using Sequential Timers

Sep 23, 2014

The post discusses an industrial water level controller system using discretely sequential timers stages. The idea was requested by one of the dedicated members of this blog.

Automatic PIR Controlled Fan Circuit for Schools and Colleges

The post explains a simple automatic PIR controlled fan circuit for school college use, which responds and switches ON only in the presence of a human (students) in the classroom. The idea was requested by Mr. Souren Bhattacharya.

Solar Garden Light with Programmable Timer Circuit

Sep 22, 2014

The post explains a solar garden light circuit with programmable timer controller which enables the connected LEDs to light up or shut off after some delay, as preferred by the user, thus it's not entirely dependent on the solar panel parameters. The idea was requested by "Unknown".

32V, 3 Amp LED Driver Circuit

Sep 21, 2014

The article presents a 32V, 3 amp SMPS circuit which may be specifically used for driving 100 watt LED modules, rated with the same specs.

Arduino Mains Failure Battery Backup Circuit

Sep 20, 2014

The article explains a simple mains failure backup circuit for providing Arduino boards an uninterruptible supply during such situations. The idea was requested by Mr. Fredrik.

Soil Moisture Sensor Meter with Automatic Water Sprayer Circuit

Sep 19, 2014

The article explains a 10 stage soil moisture sensor meter circuit with an integrated automatic water sprayer mechanism for restoring  the critical condition of the soil. The idea was requested by Mr. Remy.

Customizing Car Side Marker Lights to Flashing Side Markers

Sep 13, 2014

The article discusses a car side marker modification which enables it to respond to the existing turn signal pulses and flash in tandem with the turn signal flashing. The idea was requested by Mr. Jerry Klein.

Automatic PWM Door Open/Close Controller Circuit

Sep 11, 2014

The post explains a simple PWM controlled automatic turnstile or door circuit featuring an automatic open/close action via a photo-interrupter stage. The idea was requested by Mr. Bruce Clark.

What's Islanding in GTI (Grid Tie Inverter), How to Fix it - A Discussion

Sep 7, 2014

One big issue that most GTI manufacturers struggle to implement effectively is, what is commonly known as "islanding", the following discussion throws light on this important factor and tries to find a solution. The issue was pointed out and clarified by Mr. Dennis, Let's learn more.

Remote Controlled Pulley Hoist Mechanism Circuit Part-2

Sep 6, 2014

The previous discussion explained how the pulley hoist mechanism needs to be fixed, next, as per the request the motor is intended to be controlled via a remote control circuit.

Remote Controlled Pulley Hoist Mechanisn Circuit Part-1

The post discusses a self locking worm gear mechanism for hoisting heavy loads through an electrical motor. The main feature of the system being its self locking in an event of a motor failure. The idea was requested by Mr. Amit Patkar.

PWM Air Blower Controller Circuit for Biomass Cook Stoves

Sep 5, 2014

The article details a PWM speed controller circuit for a fan air blower system to be used in Biomass cook stoves. The circuit also includes an uninterrupted automatic battery back-up supply with an integrated automatic battery charger circuit for the particular application. The idea was requested by Mr. Tushar and Sivaranjani.

Grid Transformer Fire Hazard Protector Circuit

Sep 3, 2014

The post explains a smart mains fire hazard protector circuit which can be used for preventing mains grid transformers from over heating and causing sparks or even burning due to a possible fire. The idea was requested by Mr. Ravindra Shedge

Laptop Anti-theft Security Alarm Circuit

Sep 2, 2014

The post explains a simple laptop anti-theft alarm circuit which can used with any concerned object such as a laptop which needs to be protected, when an intruder tries to approach the unit or makes an attempt to steal it the connected alarm is instantly raised. The idea was requested by one of the dedicated readers of this blog.

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