Making an Overunity Generator Using two Motors

Aug 30, 2014

The post discusses an over unity generator set up using two motors and an inverter for getting a sustained free energy infinitely. The idea was suggested by Mr. Dare.

Chasing Car Tail Light Circuit Using 1 watt LEDs

Aug 29, 2014

The post discusses the construction chasing car tail light circuit using high bright 1 watt amber LEDs. The idea was requwsted by Mr. Brian Walton.

Aquarium Fish Feeder Timer Controller Circuit

Aug 26, 2014

The post explains an aquarium feeder timer circuit which sustains a set of continuous operations as per a predetermined timing sequence through the respective pot controls. The idea was requested by Mr. Mike.

Industrial Tank water fill/drain controller circuit

Aug 25, 2014

The post presents an industrial water level controller with drain timer circuit. The idea was requested by Mr. Lanfrank.

Car Power Window Controller Circuit - Part 1

Aug 22, 2014

The article explains a car power window controller circuit using a single push button or a couple of push buttons. The idea was requested by Mr. Win.

Car Power Window Controller Circuit - Part2

In the previous post we discussed the circuit design of an automatic car power window controller, here we'll learn how it may be enhanced with more features.

1.5 V Inductance Meter Circuit

Aug 20, 2014

Here a simplest yet quite accurate inductance meter is presented, which can be built within few minutes. Furthermore, the circuit can be powered-up with a single 1.5V cell. However, a frequency meter would be required to work-out the inductance.

Lithium Polymer (Lipo) Battery Charger Circuit

The post explains a simple lithium polymer (Lipo )battery with over charge cut off feature. The idea was requested by Mr. Arun Prashan.

Cellphone Controlled Car Starter Circuit

Aug 17, 2014

The post presents a simple cellphone triggered remote control circuit that can be applied as a cellphone operated remote car starter. The unit would cost less than $20 to build.

3.7 V Class-D Speaker Amplifier for Differential Analog Input

Aug 16, 2014

A class D amplifier is basically a category of amplifier in which the power devices (mosfets and BJTs) are operated like switches.

Making a Small Induction Cookware

The post explains a simple small induction cookware heater circuit or an induction kadai circuit. The design is a low tech, low power design, and may not be on par with the conventional units. The circuit was requested by Mr. Dipesh Gupta

Switching OFF Lights in a Periodic Sequence

Aug 10, 2014

 The post explains a circuit that will switch off a group of lamps in sequence with a predetermined delay rate, as set by the user through a built in pot. The ideas was requested by Mr. Azam Jamal

Spy Circuits - FM Bug Transmitters

Aug 4, 2014

All the spy circuits presented below are significantly powerful, hard to trace in their hidden positions, and equipped for grasping even the weakest of whispers in the vicinity. Moreover the designs are capable of transmitting the picked information upto radial distances exceeding 2 kms.

LM317 as a Variable Voltage Regulator and Variable Current Regulator

Aug 3, 2014

The post shows how the versatile IC LM317/338/396 may be used as a variable voltage regulator and also as a variable current regulator through simple configurations.

Making a Regulated 9V Battery Eliminator Circuit

The post presents a regulated 9V battery eliminator circuit which was built and investigated by Mr. Steven Chiverton, an avid reader of this blog and an experienced electronic hobbyist. Let's learn more from him.

Battery Charger Circuit for Positive Earth Cars

 The post presents an 6v or 12v battery charger circuit for positive earth cars which could be used for upgrading 6V positive earth cars, facilitating an external 12V battery to be used in them along with the existing 6V battery with a common positive earth body. The idea was requested by Mr. Joe Ceretti.

Troubleshooting Inverter Output Voltage Drop Issue

Aug 2, 2014

The post presents a discussion regarding the troubleshooting of a 4047 IC based inverter output voltage drop problem on connecting a load. The solution was requested by Mr. Isaac Johnson.

Designing World's Smallest 1KVA Inverter - Google's Little Box Challenge

Aug 1, 2014

You could probably win a million US dolars if your designed inverter is the smallest in the world and produces a minimum of 1kva, that's what the Google's little box challenge states. Are you ready for it?

Knight Rider LED Scanner Circuit - Mustang Type

In this  post we learn a straightforward circuit which produces a LED scanner type illusion through the various sequencing illumination modes over the attached LED arrays. The idea was requested by Mr. Danely Sooknanan.

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