Fluorescent lamp need high voltage AC to start and keep glowing. This 12V Battery Powered Fluorescent Lamp Driver Circuit uses 12V battery to run fluorescent lamp. It change low voltage DC from battery to high voltage AC for the tube. It is good for battery device and emergency light. Circuit has oscillator, MOSFET switch and […]
LED and Lamps
Simple Boost Converter LED Torch Circuit using IC MAX660
Simple Boost Converter LED Torch Circuit using IC MAX660 is small but useful light tool. This project use MAX660 chip to make LED torch work well. MAX660 boost 3V battery to higher voltage and can light many LEDs. It is good for battery devices needing more voltage and with no inductor needed. Circuit design also […]
Air Puff Controlled LED Circuit
Air Puff Controlled LED Circuit is fun and easy project to make. We we blow air the LED turns OFF. It is used in no-touch controls, fun devices and displays. Main part is electret mic which hears our puff. Mic triggers transistor and transistor turns OFF the LED. It works with small power like 3V […]
Car LED Voltmeter Circuit using IC LM324
Car LED Voltmeter Circuit using IC LM324 is useful project to check car battery voltage. LEDs show different voltage which is easy to see battery condition. Main part are LM324 op-amp which act like voltage checker. Voltmeter measures voltage between two points. This circuit is with LED voltmeter with IC LM324. The simple way is […]
Simple 12V Single Lamp Flasher Circuit
Simple 12V Single Lamp Flasher Circuit make lamp blink ON and OFF which looks cool. This circuit is simple and strong and is good for 12V car lamps. It is used in to turn signals, warning lights and fun lights. This one use BC557 transistor and IRF530 MOSFET. It works by charge and discharge capacitor […]
3 LEDs Battery Status Indicator Circuit
Battery status circuit is very useful in electronics systems. It helps keep battery healthy and working good in devices. 3 LEDs Battery Status Indicator Circuit is simple but works well and it shows battery voltage using three lights. Each LED shows different voltage. We can see if battery is low, normal or full just by […]