In this post I have explained a simple laser GSM call alert security circuit which immediately calls the master as soon as an intruder is detected through a laser beam interruption. The idea was requested by Mr. Roldan. Circuit Objectives and Requirements I am not an electronic engineer, but I can manage to troubleshoot minor […]
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Knock Activated Door Security Intercom Circuit
In this post I have explained a simple knock activated door security alarm circuit which can be installed by anybody for identifying a guest or an intruder at the door. The idea was requested by Mr. Akhilesh. Circuit Objectives and Requirements My brother is trying to prepare a project for his college is “Speaker intercom […]
3 Sound Activated Switch Circuits Explained
In this post I have explained 3 simple sound activated relay switch circuits which can used as a module for any system that might be assigned to trigger by detecting some kind of sound pressure level. Or simply applications such as a voice activated alarm security circuit. 1) Circuit Objective Utilizing this basic sound activated […]
Light Activated Water Level Controller Circuit
The light activated water level controller circuit explained here has the advantage of being corrosion free and much reliable than the traditional moisture sensor type of water sensors. Circuit Operation One slight downside of this LDR based sensor is that the tank interior always needs to be illuminated by some kind of light source such […]
Digital Clock Activated Water Level Controller Circuit
An automatic clock time triggered water level controller circuit which responds to a real time clock input is discussed in the following article. The design also includes a water detection stage which makes sure the initialization takes place only in the presence of water in the tank or the pipe. The idea was requested by […]
Darkness Activated Car Head Lamp Circuit with DRL
In this post I have explained a simple automatic darkness activated switch for car head lamps and the DRLs, initiated by the ignition triggers. The circuit helps to save battery power and prevents unnecessary wastage of energy. The idea was requested by Mr. Vladnemir. Technical Specifications I would like to build switch for driving car […]