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 […]
Connecting Two or More Transistors in Parallel Safely
Transistors can be connected in parallel when two or more of them have the same pinouts and specifications. This increases the combined power handling capacity of the transistors. This article will teach […]
Li-Ion LED Driver Circuits using LT1932
The article describes how to utilize a normal Li-Ion battery with a high-efficiency 1.5 V to 4.2 V LED driver circuit to improve lighting, prolong battery backup, and lengthen battery […]