Tag: Led

axio.ms published an update of the board and firmware of their SMD POV display. This device is simply 8 bright SMD LEDs and an AVR uC and makes use of the Persistence of Vision effect. You wave it about, and it writes messages in the air, with no wires, liquids or unpleasant bending!...

Integrated Silicon Solution has released a family of high performance LED drivers, IS31FL3733, IS31FL3736 and IS31FL3737 to support LED matrices consisting of 192, 96 and 144 LEDs respectively. By Julien Happich @ edn-europe.com ISSI’s LED matrix architecture provides designers...

bobricius @ hackaday.io has designed an ultra thin custom display, requiring only 6 gpio pins to drive 30 leds. FEATURES: - 1.05x0.48 inches (26.67x12.22 mm) - 30 led - any color - ultra thin .... etc. on 0.8mm board - only 6 gpio - ideal for wrist watch 4 digit...

Peak is a smart lamp that combines light, encouraging messages and a personal improvement algorithm to help you form better habits. Peak is the first smart lamp that helps people form better habits in small, progressive steps. Developing new habits is challenging. We often resist...

A ceramic-based UV LED, the VLMU1610-365-135 from Vishay provides typical radiant power of 18 mW at 20 mA and 50 mW at 60 mA over a wavelength range of 362.5 nm to 370 nm. The silicone lens of the device enables extremely long lifetimes of up to 25,000 hour, compared to typical...

Barry Tigner @ edn.com has a design idea on how to power a LED from a 1.5V battery using two easily available transistors. A previous Design Idea describes a circuit that uses an astable multivibrator to drive an LED (Reference 1). The circuit in Figure 1 uses a simpler alternative...

Lucas Reed @ instructables.com has build a proximity alarm using Arduino and an ultrasonic sensor from Parallax. If a nearby object is approaching then the alarm will sound and an RGB LED will light up. He writes: An ultrasonic rangefinder and Arduino microcontroller will check for...

by Guillermo Jaquenod @ edn.com Actual microcontrollers have powerful bidirectional I/O ports, and you can use different techniques to fully exploit such capabilities. Recent Design Ideas described the “Charlieplexing” method as an effective way to drive M=N×(N–1) LEDs using...