Magnetic Proximity Switch Sensor Circuit can feel magnetic field. It is used in factory, security and automation. Main part is magnetic reed switch as sensor. ICs like 555 timer and CD 4013 flip-flop turn relay ON/OFF when magnet is close by. Relay control other device ON/OFF. Circuit need stable 12V power for good working. Circuit […]
12V Mini Emergency Light Circuit with LDR
12V Mini Emergency Light Circuit with LDR is simple project to make. Light is ON automatically when dark. It works with bright white LED and uses 12V battery. Circuit is good for home, garage and emergency. Circuit Working: Parts List: Component Type Value Quantity Resistors 10k 1/4 watt 1 2.2k 1/4 watt 1 33Ω 3 […]
12 Watt Audio Amplifier Circuit using IC LF351
Audio amplifier is very important in sound system. It make weak sound strong for 8Ω speaker. A 12W amplifier uses IC LF351 and push-pull transistors. This 12 Watt Audio Amplifier Circuit using IC LF351 works on ±12V power and is good for small and medium speakers. Circuit Working: Parts List: Component Type Value Quantity Resistors […]
Sound-to-Beep Circuit using IC CD4049
Sound-to-Beep Circuit using IC CD4049 is a fun project. Hear whistle which beep for 3 sec. Circuit is good for door alarm, remote control other sound things. It has mic for sound, op-amps from CD4049 and transistor for buzzer. It runs on 3V battery. Circuit Working: Parts List: Component Type Value Quantity Resistors (All resistors […]
Simple Dark Sensor Circuit for Security using IC 555 timer
Simple Dark Sensor Circuit for Security using IC 555 timer is useful project for security. It senses low light and turns ON the buzzer or light. It is used for LDR as light sensing. Circuit is good for night light and alert system. The circuit have parts like 555 IC, LDR, resistors, capacitor and buzzer […]
USB Lamp Circuit for Portable Lighting
USB Lamp Circuit for Portable Lighting is good for portable light. It is easy to use and takes power from USB port of 5V. It have rechargeable battery which are more useful. USB port give only 100 mA so use LEDs less. Circuit have transistor, diodes, capacitor, resistors, LEDs for good light. Circuit Working: Parts […]