This post is for Broken Cable Detector Circuit using IC CD 4069. In this circuit there is no need to open wire to check. It work like metal finder but find AC current in wire but not in metal. It uses chip CD 4069 and this chip has small switches to turn ON light or […]
Single Push Button ON OFF Relay Circuit
We can make Single Push Button ON OFF Relay Circuit with one push button to control motor or light. Press button and relay will turn ON. Press again and relay will turn OFF. No need of microcontroller or timer IC. Use only some transistors and one capacitor. Circuit Working: Parts List: Component Type Description Quantity […]
Touch Alarm Circuit using IC 555
Touch metal part and buzzer makes sound. This uses IC 555 in monostable mode. IC 555 is good for learning in simple circuits. In this Touch Alarm Circuit using IC 555 when someone touches the metal plate then buzzer makes loud alarm. Circuit Working: Parts List: Component Type Description Quantity Resistors 1M 1/4 watt 1 […]
Electronic Horn Circuit using IC 555
Using popular IC 555 we can make Electronic Horn Circuit for cycle, alarm or fun use. This Electronic Horn Circuit using IC 555 and one 8Ω speaker makes loud horn sound for car or alarm. One 555 work as astable multivibrator which means it make square wave by switching high and low voltage again and […]
AC Power Outlet with Timer Circuit
In this AC Power Outlet with Timer Circuit think about a normal plug goes in wall but this one have a timer built-in like small control panel. This is called a timer plug or outlet timer. We can plug other device into it. Inside, small chip work like a brain and it is called 555 […]
Tachometer Circuit
This easy to build Tachometer Circuit is a small DIY tool to check speed of rotating shaft or disc. We use tachometer to know how fast shaft or wheel spin in RPS (revolutions per second). This simple circuit uses two 7-segment displays and one slotted opto sensor MOC7811 where all parts are easy to find. […]