Electronics Projects - Page 22 of 48

Audio Amplifier Circuit Using 555 IC

March 28, 2017June 28, 2022 Engineeering Projects

As being electronics hobbyists we all know about timer IC 555. Timer IC 555 is one of the most popular IC of all time because of its application. This IC has various applications like clock pulse generator, time delay circuit, etc. Here, is another application of 555 timer IC i.e. Audio Amplifier using 555. We are going to use a 555 timer IC rather than a conventional amplifier IC because it has unique features like low audio distortion and high efficiency with a high base. PWM is the method by…

RJ45 Cable Tester Circuit

March 27, 2017June 28, 2022 Engineeering Projects

In the field of networking, RJ45 is the most common cable used. This cable consists of multiple wires clamped within a single plastic tube and in such a case, there is a high probability that the project implementing RJ45 will not work efficiently. Rather than isolating the entire circuit to check the fault, it is considered wiser to test the RJ45 cable which causes failure most of the time. And, here is the tester circuit called “RJ45 Cable Tester Circuit” which is used to test RJ45 cable either in straight-through…

AC Voltage Stabilizer Circuit using 556 IC

March 25, 2017May 14, 2022 Engineeering Projects

AC Voltage Stabilizer Circuit using 556 IC Various types of AC voltage stabilizer circuits had already been posted on bestengineeringprojects.com like Versatile Auto Cut-off Unit Automatic Voltage Stabilizer Circuit Overvoltage Protection Circuit The circuit posted here is a cheap, versatile, and high-performance AC voltage stabilizer using dual timer IC 556 IC. The circuit makes use of most of the features of dual timer IC 556, namely, the four voltage level comparators, two high current sourcing/sinking outputs, two discharge transistors, and the ability to provide hysteresis with the help of its…

Servo Motor Tester Circuit Using 555 IC

March 22, 2017June 28, 2022 Engineeering Projects

I believe testing circuits are a must for project geeks since these testers save so much time in debugging circuits. People invest all their efforts and spend so much time completing one project but most of the time they don’t get the desired output. There can be multiple reasons behind this and generally, it is because the components like servo motors are at fault. The project Servo Motor Tester Circuit Using 555 IC was used in the project after isolating it from the project and helping us to detect if…

BLDC Motor Driver Circuit

March 21, 2017January 8, 2022 Engineeering Projects

After the BLDC motor driver circuit, had been introduced, its demand and use have increased past the mid- 20th century. Be it because of its flexibility that it can be converted into small size, or is it because it is much lighter than the conventional dc motor with brushes, the product is in the most preferred list of people. The device demands information about the rotor- position to set the favorable commutation angle. And, for this purpose, a Hall effect sensor is employed in the project. However, doing so can…

Listening Bug Circuit using op-amp LM386

March 17, 2017March 10, 2019 Engineeering Projects

Listening bug? What is that? Is it what strikes your head, the first time you see this title? Well, allow us to clear your confusion. Listening bug is a resemblance to that concept improves the quality of sound we hear. Input sound collected by the condenser microphone with high-sensitivity is supplied to the Listening Bug Circuit and adjustable sound gain is obtained at its output which improves the quality of sound for obvious reasons. Now, people can hear everything smoothly without risk of interruption and no talks will be missed.…

Car (Automobile) Battery Maintaining Circuit

March 11, 2017May 14, 2022 Engineeering Projects

Here is a simple circuit built around very common electronics components easily available in the local market which is used to protect car (automobile) batteries from deep discharge and also protect from getting damaged. Let’s get some facts about automobile batteries. We all know that battery itself has some self-discharge rate which depends upon battery capacity and the materials used to make it. Various reasons discharge a battery like an electrical installation in a car. When we do not use our automobile for a longer period the battery becomes fully…

DIY Hearing Aid Circuit using 555

March 8, 2017June 28, 2022 Engineeering Projects

The general circuit of Hearing Aid available over the internet used a normal transistorize circuit thus it consumes more power. So, here we are concentrated to design a circuit that consumes less power, DIY Hearing Aid Circuit using 555. For that, the circuit present here of DIY Hearing Aid Using 555 has an automatic triggering mode which consumes 96 mA at the time of amplifier trigger or you can say when sound is detected else it consumes only 6 mA which is very less. Other than less power consumption the…

Dual Polarity 5v from 9v Battery

February 28, 2017May 14, 2022 Engineeering Projects

Almost all electronic devices used in electronic circuits need a dc source of power to operate. The source of dc power is used to establish the dc operating point for the passive and active electronic devices in-corporate in the system. This day almost all circuits 5V regulated power supply but an operational amplifier requires a dual power supply (positive and negative) for proper operation, while we are using the battery power supply for a circuit then it would be difficult to get a dual polarity power supply. In order to…

Simple Battery Changeover Relay

February 24, 2017January 16, 2022 Engineeering Projects

circuit diagram of battery changeover relay

It is economical to use a battery eliminator but with frequent power failure in most developing countries, it becomes annoying to change over from battery eliminator to battery operation every time the electric supply fails. Thus, we had designed a simple battery changeover relay. A simple way to avoid the nuisance is by connecting the battery and power pack in parallel. But the advantage with such a system is that when the eliminator voltage falls, even slightly (say from 6V to 5V), though the performance of the set remains unaffected,…

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