Archive for the ‘LEDs’ Category

Running LED dice

Tuesday, December 16th, 2014

Raj over at Embedded Lab has published a new build, a running LED dice using PIC12LF1822 microcontroller: This project is about a similar LED dice but with a slightly different output form. It uses 6 LEDs which are arranged in a circular pattern and are labeled 1 through 6. They create a...

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Posted in LEDs | 1 Comment »

Build a 16 million color WiFi-controlled LED lamp

Sunday, December 7th, 2014

Tom Van den Bon and Sebastian Schocke of Binary Space, a makerspace in the Vaal Triangle, have put together this build challenge for their members. For December at Binary Space we wanted to do something a cheerful and colourful. We got together to design and build a low power LED...

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Posted in 3D fabrication, how-to, LEDs, open source | No Comments »

Building a 3-channel, high power RGB LED driver

Wednesday, December 3rd, 2014

Francesco Truzzi published a new build, a 3-channel (RGB) LED driver: I built another board, which is a 3-channel (RGB) LED driver based on an inexpensive chipset called PT4115 (you can find them on eBay or Aliexpress). The circuit is very simple and looks like Sparkfun’s PicoBuck. However, I used beefier components...

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Posted in DIY, LEDs | No Comments »

Understanding the APA102 “Superled”

Tuesday, December 2nd, 2014

Tim writes: To investigate the functionality of the AP102, I connected an ATtiny85 to the clock and data input lines and used a logic analyzer to probe both the input and output lines. The microcontroller was programmed to output various bit patterns as described below. I focused my investigation on...

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Posted in LEDs | No Comments »

Infrared LED matrix

Wednesday, November 12th, 2014

Jaanus made this infrared LED matrix project: I have lately been doing bunch of different LED matrices. One of the most interesting one is an infrared matrix, made out of old Soviet infrared light that was used for data transmission (if I remember correctly - in studios). We repurposed it to...

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Posted in infrared, LEDs | 1 Comment »

LED matrices and MAX7219 ic’s

Tuesday, November 4th, 2014

A 10 60mmx60mm Led matrices controlled by an ATmega328 + 10 MAX7219 ic's from Bajdi Electronics: Made a big LED matrix this week using 10 60mmx60mm LED matrices. I designed the PCB's myself and had them made in China. Every PCB has a MAX7219 and a header to plug the LED matrix...

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Posted in Arduino, LEDs | 7 Comments »

Portable bluetooth-enabled scrolling LED matrix display

Thursday, October 30th, 2014

An open-source cascadable 8x8 LED matrix module using Arduino and MAX7219 from Embedded Lab: Easy Matrix is a cascadable 8x8 LED matrix module with the MAX7219 chip on board, which allows to control the display with only 3 I/O pins from microcontroller. Multiple Easy Matrix modules can be easily cascaded to...

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Posted in Arduino, LEDs | No Comments »

BlinkyTile: Build your own dynamic light sculptures

Wednesday, September 24th, 2014

Matt Mets, our hacker friend,  has announced that the BlinkyTile is now being offered on Kickstarter! He writes, "BlinkyTile is a system of LED lights on pentagonal tiles for creating dynamic light sculptures in any shape you can imagine!"  

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Posted in LEDs | No Comments »

APA102 aka “Superled”

Monday, September 22nd, 2014

cpldcpu writes: I contrast to the very timing-sensitive one-wire protocol of the WS2812, the APA102 uses a standard two wire SPI protocol – one clock line and one data line. Each LED has two inputs and two outputs which can be daisy chained. At the first sight this may seem...

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Posted in LEDs | 7 Comments »

Wireless LED driver with PCA9634

Friday, September 19th, 2014

Ondřej Karas of DoItWireless writes, "If You are interested in LED driving through RF, this article would be interesting for you. I tested own PCA9634 breakout board for this chip and wrote simple low level driver for IQRF TR-52D module. Next week, I am going to publish PC application for comfortable...

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Posted in LEDs, wireless | No Comments »

WP8 bluetooth RGB LED controller with pic12f1572 16bit pwm

Tuesday, September 9th, 2014

Diego shares his latest project a WP8 bluetooth RGB LED controller with pic12f1572 16bit pwm in the forum: I made a Bluetooth board card with a pic12f1572, this pic can drive 3 output pwm at 16bit. Project files are available at Github. Via the forum.

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Posted in LEDs, PIC | No Comments »

Simple constant current driver for a high power LED

Monday, September 8th, 2014

Elmars Ositis has been working on a simple constant current driver: In my previous post, I slapped together a quick LED lighting solution for my workbench… but it is truly a hack. What I really want to do is make a simple constant current driver, so the power LEDs can be...

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Posted in hacks, LEDs | 28 Comments »

120 seconds voice record – play back

Monday, September 1st, 2014

A message recording board capable of recording 120 secs of audio by Rajkumar Sharma over at Electronics Lab: This project is designed around ISD25120 which can store 120 Seconds audio. Recording and playback operations are controlled with tact switches. The kit has an onboard microphone and LED to indicate the functions of...

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Posted in DIY, LEDs, project logs | 2 Comments »

Proximity sensing LEDs

Monday, August 25th, 2014

Here’s a proximity-sensing LEDs project by Will_W_76.  He writes a complete step-by-step instructions here: So how does this all work? What makes it proximity-sensing? Remember in the explanation above that the photo-transistor acts like a switch. So when the photo-transistor is off, no current is flowing across it to our...

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Posted in DIY, LEDs | 9 Comments »

Standalone SPI 7-segment display

Friday, August 8th, 2014

Spacewrench over at Dorkbotpdx writes: I had some spare 4-digit 7-segment LED displays and some AT90USB82s, and I'd always intended to do something with them. This was probably the easiest thing! It's just the AT90 driving the display, with a(t least) 4 wires controlling it: Vcc, GND, MOSI and SCK. (I...

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Posted in LEDs | No Comments »

Mini LED volume towers (VU meters)

Wednesday, July 9th, 2014

Here's a cool Mini LED volume towers project by Ben Finio.  He writes a complete step-by-step instructions here:   The inspiration for this project started when I saw a variety of awesome stereo LED towers on YouTube (also referred to as VU meters). Many of the videos showed the end result, and...

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Posted in DIY, LEDs | No Comments »

LED VU Meter with LM3916

Thursday, June 12th, 2014

xristost has written an article about his latest project LED VU meter with LM3916:This was finished months ago and just now I had time to finish the article. LM3916 is a dedicated IC for VU LED meter. Unlike LM3915 which have 3dB step between voltage levels, the LM3916 have nonlinear steps: -20, -10, -7,...

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Posted in DIY, LEDs | 2 Comments »

Drum light trigger that uses leds, a NE555 timer and a piezo transducer

Tuesday, June 10th, 2014

Davide Gironi writes: This circuit is a Drum Light Trigger. It uses a piezo transducer that reacts to drum vibration, and a NE555 timer to setup the light time. There are two trimmer pot, one to setup the sensibility of the vibration, the other to set how long the LED...

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Posted in hacks, LEDs | No Comments »

Simple LED driver/constant-current source 20 mA

Monday, June 2nd, 2014

Another Instructable by Jan Henrik,  a constant-current source which gives 20mA at the output.  He writes: It is a circuit, which limits the current to 20mA, what allows us to drive any normal led, without calculating a resistor, you can just plug the led in and see it emitting light… Also...

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Posted in how-to, LEDs | 4 Comments »

BlueMatrix – Bluetooth controlled LED matrix

Monday, May 19th, 2014

Luca Dentella has published his latest project: BlueMatrix. It's a portable LED matrix display based on Arduino Uno, powered by a Lipo battery and connected via Bluetooth to a personal computer or an Android smartphone. I've also developed the controlling app for Android, available on Google's PlayStore. All the schematics,...

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Posted in Android, Arduino, LEDs, wireless | 1 Comment »

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