Without the need for a large transformer, this transformerless solid-state automated night light turns on certain LEDs at night and turns them off in daylight hours. This article explains methods […]
4 Watt LED Driver Circuit Using IC LM338
This five-watt LED driver uses the IC LM338 to safely light a four-watt LED in a constant current circuit mode. As is well known, the integrated circuit LM338 is an […]
10 LED Simple Roulette Wheel Circuit
This is an example of a very basic 10 LED roulette wheel circuit. When the button is pressed, the LEDs begin to rotate (sequence) at full speed and then progressively […]
Transistorized Music Level Indicator Circuits for Amplifiers
A series of LEDs is illuminated successively in a push-pull switching fashion in response to an audio source, indicating the different intensities of the music. This type of indication is known […]
How to Generate Infrared LED Flood Light
A circuit configuration that uses infrared frequency to provide lighting over a large area is called an infrared flood lamp. Although completely undetectable to the human eye, this infrared-illuminated region […]
Auto Cut-off Battery Charger Circuit using One Transistor
The inexpensive battery charger circuit with only one transistor is intended to cut off the battery’s supply immediately when it reaches its maximum charge level. This article describes a very […]