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Archive for the ‘Detector’ Category



 Noise Filter for Stereo system

Monday, November 24th, 2014

In the receiver, stereo radio station. Usually have more noise than listening in mono. Because, the stereo system is splits signals-to-noise ratio. (S/N) There level lower, cause interference, in mono with less. becausePhase noise of the 2-back phase. When combined into a mono signal was decreased by default. As principle the noise is high frequency, […]


 Current Transformer AC Load LED Indicator circuit

Friday, October 24th, 2014

This is the LED indicator for show AC current load, that use the transformer and LED as based of circuit. Sometimes we need to detect the large AC current. One way is the LEDs is connected with the resistors and the diode 1N4001 networks. But this have disadvantage is voltage drop across too much. There […]


 Motor burn out and under voltage protection

Monday, July 28th, 2014

This is AC motor burn out protection causes of under voltage input. The principle is simple, it will check for voltage at all times. Normal voltage is 220V AC. If the voltage falls below a preset. Relay will not work and the LED is a warning. Can be set to cut no-off in the voltage […]


 Sound detector using LM324

Friday, July 25th, 2014

Today Kunal Banerjee send this project to me. It is a sound detector using LM324. He say”DEAR SIR, TODAY I HAVE MADE A SOUND DETECTOR CIRCUIT, AND ITS WORKING VERY GOOD AS ITS CAPACITY TO CATCH THE AUDIO IS TOO HIGH AND EASILY DETECT THE SOUND AND THEN IT WORKS. SO PLEASE ACKNOWLEDGE. THANKING YOU.” […]


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