Electronics Projects - Page 20 of 49

Audio Distribution Amplifier Circuit using LM324

August 11, 2017January 30, 2019 Engineeering Projects

Audio Distribution Amplifier is a circuit which transfer signal from one audio source to many output with a facility of appropriate amplification. The project published here is of Audio Distribution Amplifier Circuit using LM324 is shown in figure 1, which is basically a low cost, low noise amplifier designed using one of the most popular operational amplifier LM324. The circuit of audio distribution amplifier is combination of low noise input transistor amplifier and an op-amp in order to insure good characteristics. Circuit Description of Audio Distribution Amplifier using LM324 The circuit…

20 Watt Audio Amplifier using TDA2003

August 4, 2017October 4, 2022 Engineeering Projects

Here is a simple circuit of the “20-Watt Audio Amplifier using TDA2003″ IC to amplify the weak audio signal. Various types of amplifier circuits have already been posted in the amplifier circuit section. The IC TDA2003 contains a pre-amplifier, driver amplifier, and output amplifier internally. Basically, TDA2003 is an improved version of TDA2002 with various features like very low harmonic distortion and high output current capability. Circuit Description of 20-Watt Audio Amplifier using TDA2003 The circuit of the 20-Watt Audio Amplifier using TDA2003 shown in figure 1, build around the…

10-Watt Audio Amplifier

August 1, 2017January 7, 2022 Engineeering Projects

The Driver Amplifier amplifies the weak electrical signal from the microphone and makes it suitable for power amplification. Thus, an amplifier that is used before a power amplifier is called a driver amplifier. As all amplifier driver amplifier is also a cascade amplifier. Thus, by cascading multiple amplifier stages a project 10-Watt Audio Amplifier is built. Circuit Description of 10-Watt Audio Amplifier The project shown in figure 1 is of 10-Watt Audio Amplifier, which is basically a combination of various amplifiers i.e. pre-amplifier, driver amplifier, and a push-pull amplifier. Here…

12V DC Ballast Circuit

July 29, 2017September 4, 2024 Engineeering Projects

The project “12V DC Ballast” using power transistor 2N3055 is used to glow AC tube light using a DC source. The circuit of DC ballast is a DC-to-AC converter. DC ballast of various capacities (in watts) is already available in markets. The circuit posted here is of 20W capacity i.e. (it can drive a load up to 20 watts). Previously, we had posted Electronic Blast for Tube-light which drives load up to 40W, double the power of 12V DC Blast. Circuit Description of 12V DC Ballast The circuit of 12V DC…

Digital AC/DC Voltage cum Continuity Tester

July 26, 2017November 4, 2024 Engineeering Projects

The project “Digital AC/DC Voltage cum Continuity tester” can be used to test 25 Volts to 500 volts AC/DC voltage continuity and open-circuit condition by displaying on the 7-segment display. There is the various advantage of “Digital AC/DC Voltage cum Continuity tester” over multimeter are Small Size, low cost, easy operation and requires no troublesome selector switch to select testing mode. To make a selector switch free circuit, we had used 82K impedance for DC and 220K impedance for AC. The testing procedure is very simple all you have to…

Phase Sequence Change Indicator

July 23, 2017January 28, 2022 Engineeering Projects

The project phase sequence change indicator using 555 IC is used to indicate whether there is a change in phase sequence occurring or not by a beeper or a LED. We all know that in three-phase motor phase sequence is important because the change in phase sequence may cause trouble in machines. Circuit Description of Phase Sequence Change Indicator The circuit of phase sequence change indicator is divided into two main sections i.e. controlling section and the beeper section. The circuit of the phase sequence change indicator is shown in…

Arduino FM Transmitter

July 20, 2017May 21, 2022 Engineeering Projects

block diagram of fm transmitter circuit using arduino

The project “Arduino FM Transmitter” is a radio station with transmits either voice or music nearby area, within the range of 50 meters range. The transmitted FM signal is received by any FM receiver. Previously, we had posted an Arduino-based FM Receiver with the facility of automating or manual tuning. The project uses very few components i.e Arduino uno board (MCU) and an FM transmitter V2.0 module. This project has various applications like it can be implemented in college hospitals etc. where announcements have to do. The block diagram of…

Automatic Night Lamp Circuit

July 18, 2017May 14, 2022 Engineeering Projects

The project “Automatic Night Lamp Circuit” is very simple and built around four major components i.e. TRIAC, SCR, LDR, and Resistor. The lamp used in this project is a porch light that would turn on automatically in dark (nighttime) and turn off in light (daytime). Circuit Description of Automatic Night Lamp Circuit The circuit of Automatic Night Lamp Circuit is used shown in figure 1. The circuit is very simple and straightforward that anyone has very little knowledge about TRIAC and SCR. Silicon Controlled Rectifier | Automatic Night Lamp SCR…

Auto Cut Circuit for Over and Under Voltage

July 14, 2017May 14, 2022 Engineeering Projects

The project “Auto Cut Circuit for Over and Under Voltage” is designed to protect electrical and electronic devices from over and under voltage which ensures a long lifespan of this device. An “Auto Cut Circuit for Over and Under Voltage” has been presented here serving multiple purposes for security; under-voltage protection, over-voltage protection, auto reset, auto cut off, and regulation. Circuit Description of Auto Cut Circuit for Over and Under Voltage The circuit diagram of “Auto Cut Circuit for Over and Under Voltage” is shown in figure 1. The entire…

Dark Sensor using Arduino

July 11, 2017January 30, 2019 Engineeering Projects

The project ‘Dark Sensor using Arduino’ uses an arduino board, a LDR and switching circuit. The circuit is basically a light operated circuit which operates when dark is detected on LDR. Circuit Diagram of Dark Sensor using Arduino. Circuit diagram of the projects ‘Dark Sensor using Arduino’ is shown in figure 1, build around a arduino uno board, a LDR, three transistors and few other electronics components. The LDR is basically a transducer which change one form of energy to another form (change in light intensity to change in resistance).…

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