0 to 50V, 0 to10amp Variable Dual Power Supply Circuit

Jul 31, 2014

The post explains a simple yet very useful 0 to 50V dual power supply circuit which also includes a wide range current control feature right from 0 to 10 amps. The idea was requested by Mr. Tamam.

DIY Contact MIC Circuit

Jul 30, 2014

Contact mics can be used to sense unusual sounds when attached to various surfaces.It also Produce sound when voltage is applied to it.With the help of a basic Pre-amp circuit it can also be used to Electrify an Acoustic Guitar, where amplification is a must.

Thunder Lightning Detector Circuit

Jul 29, 2014

This simple circuit will enable you to visualize distant thunder lightning through a correspondingly choreographed LED flashes, exactly in accordance with the lightning that may be taking place somewhere in the distant sky, the response will be simultaneous and thus much prior to the sound that may reach your ears after a few seconds.

Cellphone RF Triggered Car Amplifier Auto-Mute Circuit

Jul 28, 2014

The following article presents a circuit design which would mute your car amplifier music the moment it detects a cellphone call inside the car, enabling an automatic muting during the situations, and saving the user from the manual hassles.

Vibrating Cell Phone Remote Control Circuit

Jul 27, 2014

In few of my previous articles we discussed a handful of GSM remote control circuits using ordinary cell phones as the modem. All those designs incorporated the ringtone of the cell phone as the triggering signal. In this post we'll learn how the same could be achieved but by using the vibrator feature of the modem cell phone.

Timer Circuit with Auto Pause and Resume During Power Failures

The post explains an innovative solution which could be used for pausing the counting process of a timer IC during power failures, and also restart the process when mains is restored, ensuring an uninterrupted functioning of the timer. The idea was requested by Mr. Arun Dev.

Making a Modified "Chasing" Car Tail Light Circuit

Jul 26, 2014

The post illustrates an elaborate circuit design that can be used as an enhanced "chasing" LED tail light for cars and other vehicles, the design also includes the modification details for the associated turn signal and the park light systems. The idea was designed and presented by Mr. Jason.

Parallel Battery Charger with Changeover Circuit Using SPDT Switches

In this post we learn about a parallel battery charger with changeover circuit using SPDT switches to charge multiple batteries individually or collectively which may be connected in parallel using a single battery charger and through a manual SPDT changeover switch bank.

Greenhouse Motorized Water Diverter and Humidity Controller Circuit

Jul 25, 2014

In one of the previous posts we learned the making of a greenhouse temperature controller circuit, here we study how the effects may be enhanced through an automatic water valve actuator and humidity controller circuits. The idea was originally requested by Mr. Leandros Komninos

Capacitor Based LED Tubelight Circuit Using 1 Watt LEDs

Jul 23, 2014

The post explains the construction of a homemade 100 watt capacitive tubelight circuit using 1 watt LEDs. The idea was requested, constructed, tested and verified by one the avid readers of this blog Mr. Tamam. Let's go through the entire discussion.

Underwater LED Boost Converter with Dimmer Circuit

Jul 21, 2014

The post discusses an LED controller circuit having a boost and dimming facility specifically designed for underwater shooting application. The idea was requested by Mr. Svein.

LED Chaser Circuit with Slow Adjustable Fading Effect

Jul 20, 2014

The post discusses a cool chasing LED light circuit that features a timed delay fading slow transition effect across the whole illuminated sequencing LEDs. The idea was requested by Mr. Tamam

Infrared (IR) Controlled LED Emergency Lamp Circuit

Jul 19, 2014

Here we discuss a an emergency lamp circuit which includes an infrared remote operated brightness control feature. The  idea was requested by Mr. Heeran

Wireless Home theater Circuit using Bluetooth Headset

Jul 16, 2014

The post discusses a 200 + 200 watt wireless home theater circuit using a class D amplifier and a Bluetooth headset as the wireless module. The idea was requested by Mr. Sudipta Mandal.

Modifying a Bluetooth Headset Device for Personalized Applications

Jul 14, 2014

In the previous post we learned regarding the internal circuitry of a typical Bluetooth headset, in this post we'll see how the gadget can be modified or "hacked" in order to make it work for other personalized applications.

What's Inside a Bluetooth Headset

Jul 13, 2014

In this post we will learn what's inside a Bluetooth headset gadget and also know how to hack it for using it for other useful personalized applications.

5kva Ferrite Core Inverter Circuit

Jul 10, 2014

In this post we discuss the construction of a 5000 watt inverter circuit which incorporates a ferrite core transformer and therefore is hugely compact than the conventional iron core counterparts.

Playing a Melody Using the Tone() function in Arduino

In this Arduino tutorial we’ll learn how to execute the tone() command for producing musical notes. The configuration will play a tiny musical tone that could be familiar to you.

Making a Wireless Doorbell Circuit

Jul 9, 2014

Today the traditional wired type of doorbells are gradually getting obsolete and are being replaced by the advanced wireless type of doorbells that are easier to install due to their hassle free set-ups. A simple wireless doorbell circuit is discussed in the following post which can be constructed at home.

Adjustable 0-100V 50 Amp SMPS Circuit

Jul 7, 2014

The high power adjustable switching power supply is perfect for the purpose of laboratory work. The topology used to design the system is switching topology – half controlled bridge.

Water Heater Alarm Circuit

The post explains a simple water heater alarm circuit which may be used as a safety device for getting indications regarding the switched position of a water heater or a geyser through intermittent buzzer actuation. The idea was requested by Mr. Mathew.

SMPS Halogen Lamp Transformer Circuit

Jul 6, 2014

One of the best substitutes for traditional light transformer for halogen bulbs is the electronic halogen transformer. It can also be used with non-halogen bulbs and any other form of resistive loads that does not run on RF current.

SMPS Welding Inverter Circuit

If you are looking for an option to replace conventional welding transformer, the welding inverter is the best choice. Welding inverter is handy and runs on DC current. The current control is maintained through potentiometer.

Variable LED Intensity Controller Circuit

Jul 5, 2014

The post presents a couple of simple LED intensity controller circuit which may be appropriately configured for specific related applications. The idea was requested by Mr. Chand.

Alarm Signal Generator IC ZSD100 Datasheet, Application Circuits

The ZSD100 is an alarm frequency generator IC which incorporates a frequency swept alarm signal generator designed solely for fixed and vehicle protection alarm systems.

Simple Greenhouse Temperature Regulator Circuit

Jul 2, 2014

The post discusses a simple electronic temperature regulator circuit which could be specifically used for regulating greenhouse temperatures. The idea ws requested by Mr. Leo.

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