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Search Results for: GSM

Vibrating Cell Phone Remote Control Circuit

Last Updated on July 3, 2019 by Swagatam 7 Comments

cell phone vibrator remote

In few of my previous articles I have explained 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 […]

Filed Under: Remote Control Circuits

How to Control Motor with a Cell Phone

Last Updated on July 3, 2019 by Swagatam 98 Comments

cellphonecontrolledmotorcircuit

In the following post I have explained a very simple circuit idea which can be used for controlling a motor’s rotational direction i.e. for moving it either clockwise or anticlockwise through alternate miss calls from your cell phone. The Circuit Concept I have already discussed a novel cell phone controlled remote switch circuit where the […]

Filed Under: Motor Controller, Remote Control Circuits

Make this LED Driver Circuit for Backlighting Small LCD Screens

Last Updated on June 15, 2019 by Swagatam Leave a Comment

zetexic

In this post we study a LED driver circuit specially designed for backlighting LCD screens applications, Introductionlet’ learn more about this interesting device. Introduction Today LCD products have become very common and a part of our everyday life. Whether it’s your cell phone, DVD player, TV set, car, all incorporate LCD screens for indicating or […]

Filed Under: Lamps and Lights

Transformerless Current-Controlled LED Bulb Circuits you can Build at Home

Last Updated on December 30, 2024 by Swagatam 274 Comments

In this post I have elaborately explained how to build simple transformerless LED bulb circuits using many LEDs in series and powering them through current controlled capacitive power supply circuit. Warning: Circuits I have explained below are not isolated from mains AC, and therefore are extremely dangerous to touch in the powered and open condition. […]

Filed Under: Lamps and Lights

Simple Car Shock Alarm Circuit

Last Updated on January 2, 2024 by Swagatam 6 Comments

CARSHOCKALARMCIRCUIT

A simple car shock alarm circuit I have I have explained in this article can eb effectively used to alarm the owner each time the car comes across some kind of vibrational intrusion ether from a potential theft of simply a damaging hit from  an external source. Introduction Today most of the cars are equipped […]

Filed Under: Automobile Electronics, Security and Alarm

Simple Ignition Code Lock Circuit for Automobile Protection

Last Updated on January 2, 2024 by Swagatam 15 Comments

codeswitch 1

This extremely simple code lock switch circuit can be used for locking a vehicle’s ignition by typing a hidden code over the given micro switch keypads. So now you can use this simple code lock ignition circuit for probably securing your car from a possible theft. Alternatively the circuit may be used for any application […]

Filed Under: Automobile Electronics

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