LEDs & Lighting

Presented here is the circuit that drives twenty LEDs in a random manner. LED flashers and sequencers are used in decorative lights to give pretty colour combinations by glowing LEDs in...

Light has been always a matter of scientific interest, especially in modern science. Many of us have heard or some may have studied about wave particle theory about light, which consider...

Usefulness of semiconductor laser technology is constantly increasing, especially quantum dot (QD) lasers that reliably operate with low noise at high temperatures. Vision is evolving through QD’s laser light by precise...

LED lighting is emerging as the natural choice in automotive applications due to its inherent energy efficiency and environment-friendliness. It also enables creative lighting designs that enhance the aesthetics of an...

LED billboards, screens and other products are getting more popular by the day. LED displays have become an important part of the way modern businesses communicate with their customers. Their high...

Presented here is an electronic toy circuit for your child’s entertainment. The concept of a joint family is disappearing, and childcare is also becoming difficult. It is best to spend some...

Most textile retail stores have trial/changing rooms for customers to try on new clothes before buying them. These rooms are illuminated all day long, irrespective of whether these are being used...

Most commercial torchlights use three AA or AAA cells connected in series, which produces 4.5V to drive white LEDs using a current-limiting resistor. These flashlights do not drive the LEDs efficiently...

The minuscule LED night marker presented here is an automatic light beacon that wakes up at night, or when there is not enough ambient light in its environment. Anyone active in...

This LED Night Lamp uses a 1.5W LED module operated on a 12V DC power supply. Here, an L14F1 phototransistor works as a sensor. When there is sufficient light falling on...