5 Channel IR Remote Control System using Microcontroller

5 Channel Remote Control - Transmitter Circuit

This article is aimed to design and demonstrate a simple 5 channel remote control system to drive five loads. The input signals or the commands are sent from a transmitter using IR transmission and received by the IR receiver, processed and used to drive the loads. At both the transmitter…
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Solar Inverter Technology Transfer

What is Solar Inverter Technology Transfer? All Solar inverters will run normally with a basic known technology. Usually we can get this solar inverter technology from any electronics expert.  All Electronics experts build the Solar inverter technology as per your specifications and transfer the complete information to you like circuit…
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8 Channel Quiz Buzzer Circuit using Microcontroller

8 Player Quiz Buzzer Circuit Diagram

Quiz buzzers are used often at places like educational institutions where it is required for game shows. Conventional systems require human intervention to decide which team has pressed the button and this system can be erroneous and even biased. Another problem arises when two members pressed the button at a…
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Digital Voltmeter Circuit using ICL7107

Circuit Diagram of Digital Voltmeter using ICL7107

Digital voltmeters are often preferred these days over analog voltmeters owing to their accuracy and high rate of precision. Also digital systems are preferred because of their less exposure to noise and good data compression capability. A voltmeter is an instrument measuring the potential difference between two points. A typical…
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Contactless Digital Tachometer using 8051 Microcontroller

non contact tachometer circuit diagram

A tachometer is a device which measures the speed of an electric motor. Speed of an electric motor is determined by the number of revolutions made by the motor in one minute. In other words speed is measured in rpm. Here we design a simple non contact tachometer using microcontroller…
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Password Based Door Lock System using 8051 Microcontroller

electronic code

Traditional lock systems using mechanical lock and key mechanism are being replaced by new advanced techniques of locking system. These techniques are an integration of mechanical and electronic devices and highly intelligent. One of the prominent features of these innovative lock systems is their simplicity and high efficiency.  Such an…
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100W Subwoofer Amplifier Circuit

circuit diagram of 100w sub woofer amplifier

A Subwoofer is a loudspeaker which produces audio signals of low frequencies. The first subwoofer amplifier was developed in 1970 by Ken Kreisler.  It is basically used to improve the bass quality of audio signals. Here we design a subwoofer amplifier producing audio signals at low frequencies from 20 Hz…
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BCD to 7 Segment LED Display Decoder Circuit

Common Cathode 7 –Segment LED

A display decoder is used to convert a BCD or a binary code into a 7 segment code used to operate a 7 segment LED display. It generally has 4 input lines and 7 output lines. Here we design a simple display decoder circuit using logic gates. Even though commercial…
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100W MOSFET Power Amplifier Circuit

100W MOSFET Power Amplifier Circuit Diagram

A power amplifier circuit using MOSFET has been designed to produce 100W output to drive a load of about 8 Ohms.  The power amplifier circuit designed here has the advantage of being more efficient with less cross over distortion and total harmonic distortion. Principle of Operation: This circuit operates on…
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