Led category

Mover Kit – The first active wearable that kids make & code

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Mover Kit encourages movement! It’s a game, speed-activated bike light, disco bracelet – whatever a kid can make, move & code it to be.

The Mover Kit is an intuitive way for kids ages 8 and over to learn the fundamentals of electronics, programming and solve problems creatively. It encourages kids to learn by doing what they do best – being active and playing! The Mover Kit was named Forbes’ Toy to Watch in 2016 and is loved by 300 kids that have tested it out so far.

Mover Kit – The first active wearable that kids make & code – [Link]

Better LEDs with just a trick of the light

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Jan Buiting @ elektormagazine.com discuss about a new technique used by scientist to build better LEDs.

By manipulating the incident light, researchers of the Complex Photonics Group at University of Twente in Enschede, The Netherlands, have turned light propagating in a layer of scattering nanoparticles into a rising diffusion curve.

By transforming the diffusion curve the result is more light energy being held inside an opaque layer which could lead to better yields for solar cells or LEDs. Even in a medium characterized by randomness, like a collection of non-organized particles that all scatter light, the net spreading of light is uniform. This is typical for diffusion.

Better LEDs with just a trick of the light – [Link]

6 Digit Serial Display Driver with CAT4016

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6 Digit serial display project has been designed around CAT4016 IC from ON semi. The CAT4016 is a 16 channel constant current driver for LED billboard and other general display applications. LED channel currents are programmed together via an external RSET resistor. Low output voltage operation on the LED channels as low as 0.4 V (for 2 to 100 mA LED current) allows for more power efficient designs.

A high-speed 4-wire serial interface of up to 25 MHz clock frequency controls each individual channel using a shift register and latch configuration. A serial output data pin (SOUT) allows multiple devices to be cascaded and programmed via one serial interface. The device also includes a blanking control pin (BLANK) that can be used to disable all channels independently of the interface.

Thermal shutdown protection is incorporated in the device to disable the LED outputs if the die temperature exceeds a set limit.

Features

  • 6 Digit 1 inch 7Segment Display
  • Supply Input 3V to 5.5V
  • Serial interface up to 25 MHz clock frequency
  • LED current 20mA (Range from 2 mA to 100)
  • LED current set by external RSET resistor
  • 300 mV LED dropout at 30 mA
  • Thermal shutdown protection
  • R1,R2,R3 Current Set Resistors

6 Digit Serial Display Driver with CAT4016 – [Link]

DIY Morning Feed With LED Matrix

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Here is a LED matrix able to show useful information such as weather forecast, temperature and stock updates. The matrix is controlled by a Particle Photon board.

You wake up in the morning. You’re groggy. You grab your phone lazily and start browsing. You check the weather, your stocks, your instagram. Before you know it, you’re running late! Do your mornings look like this too? We’ve been there! We wanted to streamline our mornings so we built a morning feed so that we can get all the info while we brush our teeth.

DIY Morning Feed With LED Matrix – [Link]

RGB LED Strip Controller

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Thomas Gonnot has published a RGB LED Strip Controller based  on STM32F0 microcontroller. The controller is able to power NeoPixel and DotStar protocol RGB LEDs.

A simple controller for a RGB LED strip, with independent control of color and intensity.

The design is based on a simple STM32F0 microcontroller. It can handle NeoPixel and DotStar protocols, and the power supply can vary from 5V to 15V.

Firmware available at https://github.com/fearedspark/RGB_LED_Strip_Controller

OSH park permalink: https://oshpark.com/shared_projects/Fg2xQq0t

RGB LED Strip Controller – [Link]

 

RELATED POSTS

SK6812 – a new intelligent RGB LED

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Tim discuss about a new RGB LED that appeared on the market:

During the last months, a new WS2812 alternative appeared on the market: The SK6812. I finally managed to get my hands on some of them to take a closer look. In most aspects these devices are basically clones of the WS2812. What is interesting however, is that the manufacturer came up with a couple of new variations of the stock 5050 RGB LED.

SK6812 – a new intelligent RGB LED – [Link]

PWM dimmer for RGB LED

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Lukas Fassler has designed and built a PWM dimmer for RGB LED:

In my last post I’ve described the design and construction of my LED dimmer project. This project here is similar but a bit more involved. It controls RGB LEDs so it can not only change the brightness but also the color of the light. Instead of a simple pot it used a pair of rotary encoders with push buttons. One controls the brightness, pushing its button turns the light on or off. The other changes the color, pushing its button toggles between color and white.

PWM dimmer for RGB LED – [Link]

RELATED POSTS

Large 8×8 LED Matrix Display

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jollifactory @ instructables.com has published a large 8×8 LED Matrix Display which is driven by a MAX7219 and Arduino.

For this project, we will be building a single color large LED matrix display which is made up of a few large 8×8 LED matrix modules daisy-chained together. Each of these 8×8 LED matrix modules is around 144mm x 144mm in size.

Large 8×8 LED Matrix Display – [Link]

The World’s Smallest 4x4x4 RGB LED Cube

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HariFun @ instructables.com has build the smallest 4x4x4 RGB LED cude which is less than 1 square inch in dimensions and uses 64 SMD RGB LEDs. The guide goes through the assembly and programming of the cude using an Arduino board.

The World’s Smallest 4x4x4 RGB LED Cube – [Link]