Sunday, July 27, 2014

Vibrator Based Cell Phone Remote Control Circuit

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.

Saturday, July 26, 2014

Making a Modified "Chasing" Car Tail Light Circuit

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/Changeover Circuit Using SPDT Switches

In this post we learn how 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.

Friday, July 25, 2014

Greenhouse Motorized Water Diverter and Humidity Controller Circuit

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

Wednesday, July 23, 2014

Capacitor Based LED Tubelight Circuit Using 1 Watt LEDs

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.

Monday, July 21, 2014

Underwater LED Boost Converter with Dimmer Circuit

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.

Sunday, July 20, 2014

LED Chaser Circuit with Slow Adjustable Fading Effect

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

Saturday, July 19, 2014

Infrared (IR) Controlled LED Emergency Lamp Circuit

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

Wednesday, July 16, 2014

Wireless Home theater Circuit using Bluetooth Headset

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.
Readers are advised to proceed with the construction of the presented circuits only after understanding the concepts from the core. Not adhering to this can lead to failures and frustrations.