A doorbell with DC Backup Power is a doorbell circuit that is even operational when the main power of a home, office or any building is cut off. This is highly preferable in building/home areas … Read more
Fizzah Beig
Bird sound generator, as its name, suggests, outputs the chirping sound of birds. This electronic bird chirping circuit, an inspiration from mother nature is common and serves its purpose in toys, wall clocks, automobiles, alarms, … Read more
Bird Sound Generator Using 555 Timer IC
A Buzzer Circuit here is a sound producer with simple circuitry involving NE555 timer IC along with a variable resistor-capacitor network and a speaker. Hardware Components The following components are required to make Buzzer Circuit … Read more
Simple Buzzer Circuit with NE555 IC
A beeper Circuit is a small circuit that produces a Beep-Beep sound. The simple circuit involves a NE555 timer IC that drives a buzzer and LED with the help of a variable resistor-capacitor network. Hardware … Read more
Simple Beeper Sound Circuit Using IC NE555
Today in this post we will discuss the top 3 simple timer circuits. A timer switch or timer circuit is a timer to control any electronic switches or circuits by a timing mechanism. Here, the … Read more
Top 3 Simple Timer Circuits
A light sensor circuit activates when light is detected by the circuit. It is a simple circuit including a photoresistor followed by a transistor. When light strikes the surface of the photoresistor, light energy is … Read more
Simple Light Sensor Circuit
Clap switch circuits work by detecting the sound of a clap, whistle, or any other sound of the same pitch. This electronic mini-project has the ability to detect a high pitch as that of a … Read more
Simple Clap Switch Circuit using NE555 Precision Timer IC
An IR receiver circuit is a simple circuit including an IR receiver and a transistor. In this circuit, the receiver used is a 38kHz transmitter TSOP4838. It receives an IR signal and Turns ON an … Read more
IR Receiver TSOP4838 Circuit
The audio level meter is a circuit that detects and measure the level of audio/sound in the surrounding. These sound circuit converts sound energy from the surrounding into electrical energy to light LEDs accordingly. A … Read more
Audio Level Meter Using 2n3904 Transistors – DIY Projects
LED Flasher Circuit, here, uses LM3909 as the main operator. It is a very simple, cost-effective circuit that uses just an IC LM3909, an LED, and an electrolytic capacitor. The IC LM3909 operates at a … Read more
Simple LED Flasher Circuit Using LM3909 Oscillator IC
The two-level temperature switch measures two different temperature ranges. After that, the relay turns ON/OFF corresponding to the temperature level. Furthermore, the circuit includes IC LM358, transistors, diodes, and relays. Hardware Components The following components … Read more
Two-level Temperature Switch Circuit with LM358
Telephone line tester circuit is more like a meter. Also, it is a very simple circuit involving just few resistors, a switch and an ammeter. Hardware Required S.no Components Value Qty 1. Ammeter 0-1mA 1 … Read more
Simple Telephone Line Tester Circuit
The four-level temperature indicator is a circuit that represents different temperature levels through the lighting of four different LEDs. The project involves the IC LM324 as its main component. Hardware Required S.no Component Value Qty … Read more
Four-Level Temperature Indicator Circuit Using LM324
The telephone amplifier circuit, as its name suggests, amplifies the incoming calls to be heard in a room. while in conversation with a distant subscriber the voice is so faint that is barely heard, hence, … Read more
Telephone Line Amplification Using LM386
Intercom Circuit is a bidirectional communication application for the ease of not-so-far-distant communication. The intercom is simple and easy to build a low-cost circuit using a single amplifier IC LM386 and a 2N3904 transistor. IC … Read more
Bidirectional Intercom by using LM386 IC
A doorbell, here described, is activated as soon as a door knock is heard on the door. It is simple, sensitive, and has a low-cost sensor-based circuit. This doorbell circuit is such that Piezo Electric … Read more