In this project, let’s learn about automatic wiper control using NE555 IC. As you all know, NE/SE 555 is one of the most common timer IC ever created in the world. There is absolutely no electronics enthusiast who has never played with the 555 IC. We’ve extensively covered 555 IC, where we have a big […]
Simple Radio Circuit Op-amp is the short form for Operation Amplifier. It is a device used to amplify voltage, and is very popular due to its high gain amplification. It can often amplify voltage to hundred times of what is input. This project is aimed at making a simple radio circuit using an opamp. Description
Radio Collar Transmitter Radio collars or tracking collars are tracking devices used to study animal migration patterns, they are also used to keep tab of endangered species. In India, radio collars are commonly used on tigers to keep track of them. Obviously, a radio collar has a strap which is worn around the neck of the
Power Supply Circuit-40 Volts-2A LM317 is a widely used linear voltage regulator. It has 3 pins; input, output and adjustment. LM317 are energy wasters and always require a heat sink to keep the temperature of the circuit low. But due to its simplicity LM317 find a place in a wide range of power supply units.
This article lists various types of audio amplifier circuits using Mosfet. We have tested all these circuits in our lab and we found all of them performing satisfactorily. What is a Mosfet Amplifier? Mosfet is a 3 terminal semiconductor device used in a wide range of electronic circuits. It works like a JFET but has
Melody Generator Circuit This is a simple project using the IC UM66. UM66 has an inbuilt beat and tone generator. This IC, with its three legs, looks like a transistor. This IC has many versions for playing different songs/beats. This project is suitable for beginners as its circuit is very simple. Description  The UM66 series
19 Watts Simple Amplifier Circuit This is a 19-watt simple amplifier circuit diagram using IC LA4440 from Sanyo. It uses very fewer components other than the IC LA4440. A very high-quality circuit with respect to its cost and ideal for beginners. Here IC LA 4440 is wired as a bridge amplifier to deliver a 19
InfraRed (IR) Sensor/Detector Circuit The IR circuit described below is mainly designed for liquid level detection or proximity detection. The IR sensors used here are an IR LED and an IR photo diode. The circuit operates by detecting the distance from the target by reflection of an infrared beam. The biggest advantage of this circuit is
Dual Adjustable Power Supply Circuit A power supply is a circuit based electronic device that supplies the needed electrical energy to an electrical load. Power supplies can also be named as electric power converters as they are used to convert electrical energy from one form to another. Power supplies are used in everyday consumer devices
Adjustable/Variable Voltage Regulator using LM 117 IC A circuit that regulates the output voltage within a desired range and can be adjustable within that range is called an Adjustable Voltage Regulator. Depending on the range of voltage to be adjusted, there are many types of adjustable voltage regulators. Two of the most commonly used IC’s
This is the circuit diagram of a simple corrosion free water level indicator for home and industries. In fact, the level of any conductive non-corrosive liquids can be measured using this circuit. The circuit is based on 5 transistor switches. Each transistor is switched on to drive the corresponding LED when its base is supplied
The light dimmer circuit or fan regulator circuit (either case, the circuit, and design are the same, the only difference is the output load to be varied, that is, fan or light) is used to control the brightness of the light or the speed of the fan according to our desire. The objective of the
A fridge door open alarm circuit is explained with its detailed working and circuit. The objective of this circuit is to produce an audible alarm when the fridge is left open for more than a preset time. This versatile door alarm is made possible with the use of two 555 timer IC’s. Both the 555
VOIP (Voice over Internet Protocol) is a protocol used for the transmitting voice through the Internet or other packet-switched networks. VoIP is often used to refer to the transmission of voice . VoIP is also known as Internet telephony, Broadband Phone. VOIP is pronounced as “voyp”. Companies providing VoIP service are commonly referred to as
In this article, we have designed a transistor-based security alarm circuit with a high power siren that can be used to provide security for homes or as a warning for intruders trespassing. Only the basic design is provided in the circuit. You can check for advanced security alarm circuits using Arduino and Micro-controllers in the
An Automatic LED Emergency Light circuit is designed to turn ON when there is no adequate lighting or if the power supply is cut-off. Earlier fluorescent lights were used to build such circuits. But the use of LEDs has proven to provide adequate lighting for a longer period before draining the battery. We have developed
