No Load Detector and Cut-off Circuit for Inverters

Jul 31, 2015

The post discusses a relay cut-off circuit which may be included in inverters to ensures that under a no load at the output the condition is quickly detected and the supply cut off, preventing the inverter from operating unnecessarily. The idea was requested by Mr. Rajath.

Timer Circuit for Pneumatics

Jul 30, 2015

 The article explains a simple two step IC 555 timer circuit which can be used for sequentially operating any specified industrial mechanism system, in this application it's used for operating a pressurized pneumatic ball throwing arm. The idea was requested by Mr. Ray Strong.

Subwoofer Music Level Indicator Circuit

Jul 29, 2015

The post discusses a  LED music power level indicator for indicating a subwoofer bass power range, which can be also modified as an effective dancing Electroluminescent Wire light show. The idea was requested by Mr. David.

Designing a Customized Battery Charger Circuit: Part 3

Jul 26, 2015

In our previous tutorials we learned how to customize a constant voltage while building a battery charger, while in the next section we understood how to add a customized constant current to the design for assuring a safe charging for the connected battery. In this section we'll discover how an auto cut-off may be added to a battery charger which is one of the most crucial aspects in such circuits.

Designing a Customized Battery Charger Circuit: Part 2

In our previous tutorial we learned how to design and optimize a constant voltage feature for charging a particular type of battery, in this post we try to understand how to design and include a constant current feature for the same, which is another critical factor to be considered while making a customized battery charger circuit.

Designing a Customized Battery Charger Circuit: Part 1

I have designed and published a variety of battery charger circuits in this website, however the readers often get confused while selecting the right battery charger circuit for their individual applications. And I have to explicitly explain each of the readers regarding how to customize the given battery charger circuit for their specific needs.

Adding a PWM Multi-spark to an Automobile Ignition

Jul 23, 2015

The post investigates a simple 2 pin oscillator circuit which may be inserted between the pickup coil and the CDI unit of a vehicle for achieving an induced multi trigger input in response to each signal from the pickup coil coil, this in turn is expected to enhance the sparking ability of the CDI coil. The idea was requested by Mr. Vimal.

Ferrite Core Material Selection Guide for SMPS - Part 1

Jul 22, 2015

Ferrite is a wonderful core substance for transformers, inverters and inductors in the frequency spectrum 20 kHz to 3 MHz, owing to the benefits of reduced core expense and minimal core losses.

Make this 3V, 5V, 6V, 9V,12V,15V Dual Power Supply Circuit using LM317,LM337

Jul 20, 2015

The purpose of this paper is to detail a variable dual lab power supply circuit. To build the same, we can use variety of voltage levels [3V,5V,6V,9V,12,15V at 1A].

PWM Motor Speed Controller with Adjustable Delay Timer

Jul 17, 2015

The post details a simple adjustable PWM motor speed controller with an attached timer circuit so that the motor can be assigned a fixed predetermined operating time, or delay OFF time. The idea was requested by Mr. Cribey

Transformer Winding Formula Explained

Jul 16, 2015

The net magnitude of voltage induced across the primary winding of a transformer to its secondary winding is basically determined by the ratio of the number of turns wound over the primary and the secondary sections.

Simple Geyser Water Heater Timer Circuit

Jul 14, 2015

 In this post we study a simple water heater timer controller circuit which can be used in bathrooms for automatically switching OFF a geyser or a water heater unit after a predetermined time period as preferred by the user. The idea was requested by Mr. Andreas

Emergency Generator Power Distribution Circuit

Jul 13, 2015

The post explains a twin generator network system to be used for two separate houses during power failure and through automatic changeover.The idea was suggested by Mr. Ahmad.

Simple Scrolling RGB LED Circuit

Jul 11, 2015

A simple RGB (Red, Green, Blue) moving or scrolling LED display can be made using a few 4017 ICs. Let's learn the procedure in detail.

Sine wave PWM (SPWM) using Opamp

Jul 9, 2015

Acquiring a sinewave output from an inverter can be the most crucial and the most advantageous feature for rendering maximum efficiency to the unit, in terms of its output quality. Let's learn how to make sine wave PWM using an opamp.

Automatic Sliding Gate Controller Circuit

Jul 7, 2015

In this post we investigate a circuit, designed for implementing an automatic sliding door action, and includes a set of features as specified in the request. The idea was suggested by Mr. Andreas.

Automatic Bathroom/Toilet Engage indicator

Jul 6, 2015

 The post explains a very simple automatic bathroom/Toilet Engage indicator circuit which can be installed with any relevant door bolt for implementing the actions. The idea was created and submitted by Mr. Sandipan.

How Thyristors (SCR) Work - Tutorial

Jul 5, 2015

Basically an SCR ( Silicon Controlled Rectifier) which is also known by the name Thyristor works quite like a transistor. The device gets its name (SCR) due to its multi layered semiconductor internal structure which refers to the "silicon" word in the beginning of its name.

Solar Insect Killer for Protecting Crops in Farms

Jul 1, 2015

The insect killer circuit presented here is designed to attract insects during night, and electrocute them through a high voltage mesh trap. The unit can be installed in farms for protecting crops from potentially harmful insects. The unit being solar powered does not depend on human intervention and works independently.

Ultrasonic Solar Insect Repellent Circuit for Protecting Crops in fields

The post explains a simple to build ultrasonic insect repellent circuit which can be installed in farms and used by the farmers for driving away all sorts of insects, bugs, grasshoppers etc in order to protect the crops from these potentially harmful pests. The idea was requested by Mr. Cia Brisat.

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