Touch metal part and buzzer makes sound and this uses IC 555 in monostable mode. IC 555 is good for learning in simple circuits and in this Touch Alarm Circuit using IC 555 when someone touches the metal plate then buzzer makes loud alarm. Circuit Working: Parts List: Components Values Quantity Resistors 1M 1/4 watt […]
Security and Protection
Electronic Horn Circuit using IC 555
Using popular IC 555 we can make Electronic Horn Circuit for cycle, alarm or fun use, as this Electronic Horn Circuit using IC 555 and one 8Ω speaker makes loud horn sound for car or alarm. Furthermore, one 555 IC work as astable multivibrator which means it make square wave by switching high and low […]
Simple Over Voltage and Reverse Voltage Protection Circuit
Our device is safe from bad voltage by using this Simple Over Voltage and Reverse Voltage Protection Circuit, as this circuit uses P channel MOSFET FQP47P06 which better than only diode. Furthermore, simple diode can stop reverse voltage but not protect from overvoltage or surge, but here the MOSFET and Zener diode give protection. Circuit […]
Stop Dog Barking using IC 555 Circuit
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 […]
Stun Gun Circuit using IC 555
Stun Gun Circuit using IC 555 is simple electric device which make high voltage for non-lethal self defense. Remember, before making it we must know the danger and law rules to follow. Circuit Working: Parts List: Components Values Quantity Resistors 33k, 1k 1/4 watt 1 each Capacitors Ceramic 10nF, 100nF 1 each PPC 10nF 400V […]
Simple Metal Detector Circuit using IC 555
This is Simple Metal Detector Circuit using IC 555, uses IC 555 chip which works like small clock and makes signal to help find metal and magnet Also, it is easy to build and good for beginners. Circuit Working: Parts List: Components Values Quantity Resistor 47k 1/4 watt 1 Capacitors Electrolytic 10μF 25V 1 Electrolytic […]