This is 2 way speaker box design for audio system. I’ve used this design for my home audio system, the sound quality is good. Two speakers used for this speaker box that are tweeter / high […]
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USB Power Booster for PC / Laptop
This is the circuit diagram of USB power booster, expecially to strength the power capability of USB port from PC / laptop / notebook. USB from PC can supply only a limited power to the external […]
Car Parking Guard based IR Sensor
This is the circuit diagram of car parking guard based IR sensor to detect the distance between car bumper and garage wall. this circuit which will help the person in the driving seat and give alarm […]
Ultra Bright LED Emergency Light
This is LED emergency light that will turned on automatically when mains supply fails, and turned off when mains power resumes. This circuit produces highly bright because the use of ultra bright white LEDs. This circuit […]
Ultrasonic Distance Detector / Sonar Ranging System
This is the ultrasonic distance detector or sonar ranging system which can be used for general purpose. There are kit version available on the market, but of course the price is 3x more expensive than if […]
Static Circuit Breaker / RFI Eliminator
This is the circuit diagram of Static Circuit Breaker.? Many a times you must have heard an undesired sharp sound emanating from the speaker, when any power appliance, like an electric iron, is switched ON of […]
Speaker Protection Circuit (Stereo)
This is the speaker protection circuit, provides stereo speaker protection and prevents switch-on clicks and DC components on the output of the amplifier connected.
Digital Tachometer / RPM Meter
This is the circuit diagram of Digital Tachometer / Digital RPM Meter which can be used for cars or motorcycles with 2 and 4 stroke petrol engines with any number of cylinders and contact breaker or […]
Digital DC Voltmeter based ICL7107 Chip
Here is the schematic diagram of digital DC voltmeter built based IC ICL7107. The power supply for this circuit is +5V. You may use 9V battery and then use regulator IC LM7805 to achieve 5V stabilized […]
230V Automatic Night Lamp
This is the circuit diagram of 230V automatic night lamp based photo resistor to sensing the light environment. When the condition is dark enough, the one or more lamps will be turned on and when the […]