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. 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 outside […]
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. The sound come from 555 IC making pulses at certain speed (frequency). Circuit Working: Parts List: Category Description Quantity Resistors 390Ω, 1k, 220k, 100k, 33k, 22k 1/4 watt 1 each Capacitors Ceramic 10nF 2 […]
How to Charge a 12V Battery from a 12V Supply
In this post for How to Charge a 12V Battery from a 12V Supply, this circuit uses 12V power and work like battery charger. It make voltage go higher than 12V to push current into battery. It uses special parts and control transistors good so there is no overheat. It give safe charging current around […]
Stun Gun Circuit using IC 555
Stun Gun Circuit using IC 555 is simple electric device. It make high voltage for non-lethal self defense. Before making it we must know the danger and law rules to follow. Circuit Working: Parts List: Category Description Quantity Resistors 33k, 1k 1/4 watt 1 each Capacitors Ceramic 10nF, 100nF 1 each PPC 10nF 400V 8 […]
Motor PWM Speed Controller Circuit using IC 555
No need to change voltage knob. This smart Motor PWM Speed Controller Circuit using IC 555 to control DC motor speed. It turn motor power ON and OFF very fast so motor gets average voltage and its speed changes. Like dimmer switch but for motor. Circuit Working: Parts List: Category Description Quantity Resistors 470Ω, 1k […]
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. More light like sound gets louder or higher. It is called the light dependent screamer. Circuit Working: Parts List: Component Type Value Quantity Resistor 1k 1/4 watt 1 Light Dependent Resistor […]