Basic H-bridge PWM circuit uses IC 555 which helps to control dog barking and stop it. Main part is ultrasonic tweeter. It work with two IC 555 and four driver transistors. Circuit Working: Parts List: Category Description Quantity Resistor 1k 1/4 watt 1 Potentiometer 100k 1 Capacitor Ceramic 1nF 1 Semiconductors IC 555 2 Transistors […]
H-Bridge PWM Driver Circuit using IC 555
H-Bridge PWM Driver Circuit using IC 555 controls DC motor speed and direction. In this circuit no driver transistors are used. Motor connect direct to two IC 555. Motor speed and direction can change. We can only use two IC 555 to control the motor. This circuit is easy to make and is used for […]
Simple Fade On Fade Off LED Circuit
Simple Fade On Fade Off LED Circuit makes LED turn ON and OFF slowly, but not suddenly. It is also called a dimming circuit with fade effect. It looks smooth and nice to eyes. Circuit Working: Parts List: Category Description Quantity Resistors 100k 1/4 watt 3 1Ω 0.5W (or 8.2Ω depending on LED color) 1 […]
Simple Traffic Signal Lights Circuit using IC 555
This project is Simple Traffic Signal Lights Circuit using IC 555. It uses 555 IC and LEDs to show traffic signal lights in sequence. The circuit is simple to build and parts are easy to find. Circuit Working: Parts List: Category Description Quantity Resistors 470Ω, 100k, 47k 1/4 watt 1 each 220Ω 1/4 watt 2 […]
Simple Hulda Clark Zapper Circuit using IC 555
Simple Hulda Clark Zapper Circuit using IC 555 make electric current with set frequency for healing. It uses IC 555 chip. This type of circuit are also called Hulda Clark zapper which was made in 2003. Circuit Working: Parts List: Category Description Quantity Resistors 1k, 3.3k 1/4 watt 2 each Capacitors Ceramic 4.7nF 1 Ceramic […]
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. 555 chip give quick electric pulses and controls the sound timing. Pulses turn into sound and make “rat-a-tat-tat” noise. Want loud sound? Easy! Add amplifier and make sound big and strong. Circuit […]