This easy Motion Detector Circuit uses IC 555 to find human from far, as circuit have two parts: Transmitter: IC 555 work like astable multivibrator and it make square wave signal and this signal goes out through IR sensor (infrared). Receiver: Phototransistor see IR beam and if someone moves and block the beam then phototransistor […]
DIY Projects
12V SMPS Driver Circuit for LED Strip
12V SMPS driver change big AC power from 110V or 220V into small 12V DC, also circuit is good for LED strip light. Furthermore, in this DIY project we can make cheap and strong LED driver, which can power full 12V LED strip with 100 or 200 LEDs. Important points to follow: Here, Circuit uses […]
Logic NAND Gate Circuit using Transistors
Logic NAND Gate Circuit using Transistors is very important in digital logic, as it work opposite of AND gate. Output is HIGH when any input is LOW. People call the NAND gate a universal gate because it can implement all other basic logic gates, including AND, OR, and NOT. Truth Table for Logic NAND Gate: […]
Broken Cable Detector Circuit using IC CD 4069
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. Furthermore, it uses chip CD 4069 and this chip has small switches to turn ON light […]
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 and then press again and relay will turn OFF; hence, there is no need of microcontroller or timer IC, so use only some transistors and one capacitor. Circuit Working: […]
Touch Alarm Circuit using IC 555
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 […]