This 3V LED Driver Circuit using IC LT1937 is small LED driver. It uses IC LT1937 which can run white LED from only 3V battery. IC take low voltage and boost up for LED. Circuit is good for mobile light, small torch, display backlight. It save power and give stable bright light. Block Diagram: See […]
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Simple LED Constant Current Circuit
Just think like water pipe filling bucket. Normal circuit is like set water pressure voltage and hope the bucket fills good. But with LED this Simple LED Constant Current Circuit is like smart nozzle. It keep water flow current same even if pressure changes a little. This way LED light up nice and live longer. […]
Solar LED Lantern Circuit
Solar LED Lantern Circuit is small setup using sun power to give light with LED. It have solar panel through which the battery charges again to LED lights and some small parts like diode, resistor and transistor. Circuit Working: Parts List: Type Value Quantity Resistors 15Ω 1/2W 1 1.5Ω 1/2W 1 1k 1/4W 2 Semiconductors […]
Simple 220V LED Night Lamp Circuit
This Simple 220V LED Night Lamp Circuit design make night light work straight from home power plug which is usually 220V AC. It does this by using small transformer or special capacitor to drop voltage low so LED lamp can work safe. Circuit Working: Parts List: Type Value Quantity Resistors 10Ω 1W 1 560k 1/2W […]
220V Lamp Flasher Circuit using IC 555
This 220V Lamp Flasher Circuit using IC 555 uses one special chip IC 555 to make normal bulb blink like party light. The chip make ON/OFF signal. This signal connects to transistor or triac which work like switch for bulb power. When power goes ON and OFF fast then bulb start blinking in fixed speed. […]
Simple LED Tester Circuit
This small and Simple LED Tester Circuit is like a small doctor for LED. It helps to see if our light LED is working or not. Think like a small setup one battery, some small resistor like tiny traffic light for electric and clip to put LED. When we put LED in circuit check if […]