Category: Led

The voice unit (VU) meter is a device that displays a representation of the signal level in audio equipment. It is used in some consumer audio equipment for utilitarian purposes such as in recording devices or for aesthetics like playback devices. The original VU meter is a passive...

This project is an electronic dice. It consists of seven LEDs positioned like a dice which light up to show the number. The leds are controlled by a 74HC4017 decade counter IC. Of this IC six outputs are used to drive the LEDs and a seventh output is used to reset the counter. This...

Designed for everyday food analytics, the SFH 4735 LED emits broadband infrared light in a wavelength range from 650 to 1,050 nanometers. by Julien Happich @ edn-europe.com The component is well suited as a light source for near-infrared spectroscopy, for example to assess the...

ray @ rayshobby.net build a wifi enabled color led matrix using ESP8266. He writes: Last Thursday I had a lot of fun doing a workshop at my college (UMass Amherst) where I taught students to use a WiFi-enabled Color LED matrix combined with Javascript programs to create animations...

Xose Pérez @ tinkerman.cat build a MQTT LED matrix display to get notification messages. My MQTT network at home moves up and down a lot of messages: sensor values, triggers, notifications, device statuses,… I use Node-RED to forward the important ones to PushOver and some others...

Jeremy @ thecustomgeek.com updated his RGB LED controller with a bunch of improvements. The new RGBW LED Controller is here! The video above shows some of the things it can do, but here is a list of improvements: IRLB8721PBF MOSFET’s – More power! Double sided and thicker...

Raj @ embedded-lab.com has revised his RGB Matrix Display Shield to an improved version. The shield now also carries the DS1307 RTC chip on board along with a CR1220 coin cell battery holder on the back. It is applicable for driving popular 16×32 RGB matrix panels with HUB75 (8×2...

This application example shows how to connect and use RGBW LED stripe with TPS hardware platform. The main difficulty is that LEDs have their own color generation circuit inside. New FPGA Tibbit #57 can generate fast PWM signal, which is needed for proper LEDs operation. Also, the...