Basic H-bridge PWM circuit uses IC 555 which helps to control dog barking and stop it, main part is ultrasonic tweeter. Furthermore, it work with two IC 555 and four driver transistors. Circuit Working: Parts List: Components Values Quantity Resistor 1k 1/4 watt 1 Potentiometer 100k 1 Capacitor Ceramic 1nF 1 Semiconductors IC 555 2 […]
Audio Circuits
Simple Machine Gun Sound Generator Circuit using IC 555
This project for Simple Machine Gun Sound Generator Circuit using IC 555 which makes circuit like machine gun sound, short and fast bursts. Here, 555 chip give quick electric pulses and controls the sound timing and this pulses turn into sound and make “rat-a-tat-tat” noise. If want loud sound? its easy! just add amplifier and […]
Simple Morse Key Circuit using IC 555
This article show how to make a Simple Morse Key Circuit using IC 555, which is an easy circuit and is good for Morse code practice. Also, IC 555 can work in many ways, in this project it work as astable multivibrator which means it make signal by itself and there is no need for […]
Wailing Siren Circuit using IC 555
A Wailing Siren Circuit using IC 555 is simple to make sound like real siren, going up and down in pitch, also the sound come from 555 IC making pulses at certain speed (frequency). Circuit Working: Parts List: Components Values Quantity Resistors 390Ω, 1k, 220k, 100k, 33k, 22k 1/4 watt 1 each Capacitors Ceramic 10nF […]
Simple Light Dependent Screamer Circuit
Fun small and Simple Light Dependent Screamer Circuit make sound change with light; it uses LDR like a special resistor which changes with light. Furthermore, as the light intensity increases, the sound becomes louder or higher in pitch, therefore, we call this circuit a Light-Dependent Screamer. Circuit Working: Parts List: Components Values Quantity Resistor 1k […]
Simple Toy Organ Circuit using IC 555
This is small and Simple Toy Organ Circuit using IC 555 make sound like music when we press a switch. We use an IC 555 in astable mode to generate sound and when the user presses different switches, the circuit produces different tones. Therefore, the circuit is simple to construct and serves as an excellent […]