Solar LED Light Circuit with Automatic Charger

Mar 31, 2015

In this post we learn how to build a simple solar LED with charger circuit for illuminating high power LED (SMD) lights. The SMD LEDs are fully safeguarded thermally and from over current using an inexpensive LM 338 current limiter stage.  The idea was requested by Mr. Sarfraz Ahmad.

PIR Motion Activated Relay Circuit

Mar 29, 2015

The post explains a simple motion activated PIR relay circuit which can be used for activating lights only in the presence of a human, thus saving precious electric power.

Automatic Door Circuit for Hen House

Mar 28, 2015

The articles discusses an automatic door mechanism circuit that responds to the ambient light conditions by keeping the door open during day time and closed during night. Here the application is used for operating a hen house door. The idea was requested by Mr. Gavin Sweet

Digital Christmas Candle Light Circuit

Mar 20, 2015

The post discuses a sequentially advancing 25 LED timer circuit which may be initiated  on the 1st day of December so that each LeD lights up on each day until the 25th of December (on Christmas) when all the 25 LeD can be seen lit up. The circuit was requested by Mr. Guy Mathews

Mains Over Load Protector Circuit for Lathe Machine

Mar 17, 2015

The article discusses a simple overload cut off circuit for safeguarding heavy mains operated machines such as a lathe machine. The idea was requested by Mr. Howard Dean.

Digital Voice Changer Circuit

Mar 16, 2015

The post explains a circuit which has the ability to change or transform an individuals unique voice into a completely new form.

Fan Speed Controller for Heatsink

In this post we study about a automatic fan speed regulator circuit for controlling the temperature of a heatsink and from preventing th etemperature to erach dangerous levels. This approach is to ensure safeguardign of the connected devices wit the heatsink.

100 amp Variable Voltage Power Supply Circuit

Mar 13, 2015

The post describes a  simple but extremely versatile 100 amp, variable voltage power supply circuit using just a few BJTs in parallel and in a common collector mode. The idea was requested by Mr. Andre.

220V DC Inverter UPS Circuit

Mar 9, 2015

The post discuses a simple 220 V to 220V DC online UPS inverter circuit. The idea was requested by Mr. Taiye.

Infrared Remote Controlled Door Lock Circuit

Mar 7, 2015

In this article we learn about a simple infrared remote controlled door lock circuit which can be used for securely locking doors through unique foolproof IR frequencies.

Battery Charging Fault Indicator Circuit

The article explains a battery status indicator circuit which can be also used as a battery charging fault indicator circuit. The idea was requested by Mr. Faizan.

Making a Strong RF Discharge Circuit

Mar 5, 2015

In this article we study an RF discharge generation concept capable of producing an intense RF electrical discharge in the air which may have the potentials of paralyzing all electronic systems in the close vicinity. The idea was requested by Mr. Nidal.

Sinewave Inverter Circuit Using Arduino

Mar 3, 2015

The post explains how to build a simple sinewave inverter circuit using PWM feed from an Arduino Uno board, the article also discusses a sinewave 3 phase inverter using the same input from an Arduino. The idea was requested by Mr. Raju Visshwanath

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