LEDs are small light sources that consume less power and produce high brightness. Different types of LEDs, such as standard LEDs, high-power LEDs, RGB LEDs, and SMD LEDs, serve various applications, including TVs, flashlights, displays and decorative lighting. Therefore, today LED is everywhere and is very important part in human life. Working Principle of LEDs: […]
LED and Lamps
Simple LED Alert for Telephone Off-Hook Detection Circuit
This simple LED circuit detects voltage drops when we lift the handset, actively turning ON an LED to show that our telephone is in use. Also, circuit is good for old phones with no light alert and it is very useful for shared phones and stops call interruptions. Here, circuit runs on simple 3V battery […]
12V Battery Powered Fluorescent Lamp Driver Circuit
Fluorescent lamp need high voltage AC to start and keep glowing., so we have designed this 12V Battery Powered Fluorescent Lamp Driver Circuit which uses 12V battery to run fluorescent lamp. It change low voltage DC from battery to high voltage AC for the tube and it is good for battery device and emergency light. […]
Simple Boost Converter LED Torch Circuit using IC MAX660
Simple Boost Converter LED Torch Circuit using IC MAX660 is small but useful light tool, as this project use MAX660 chip to make LED torch work well. MAX660 boost 3V battery to higher voltage and can light many LEDs, furthermore, it is good for battery devices needing more voltage and with no inductor needed. Also, […]
Air Puff Controlled LED Circuit
The Air Puff Controlled LED Circuit is a fun and easy project to build and when we blow air onto the microphone, the circuit turns the LED OFF. This circuit is useful for no-touch controls, interactive devices, demonstration projects, and display applications. Main part is electret mic which hears our puff and then mic triggers […]
Car LED Voltmeter Circuit using IC LM324
Car LED Voltmeter Circuit using IC LM324 is useful project to check car battery voltage, here, LEDs show different voltage which is easy to see battery condition. Main part are LM324 op-amp which act like voltage checker and voltmeter measures voltage between two points. Hence, this circuit is an LED voltmeter using the IC LM324 […]