Here’s a cool heart simulation project by Addie over on @tymkrs: This wearable LED heart simulator pendant was inspired by my work as a cardiovascular surgical nurse as well as my love of electronics. It simulates the electrical activity of 17 different rhythms and when paired with the heart backplane, it becomes an audio and […]
Category Archives: LEDs
Simple high bright LED night light with dimmer
Dilshan designed and developed a high bright LED night light to replace his 5W (filament base) night lamp: This circuit is mainly based around TL494 PWM driver IC and LM350 – 3A adjustable voltage regulator. The LED used in this project is 9V – 10W high bright LED and this given design is capable to drive […]
The MAX7219 LED display controller – real or fake?
John Boxall over at Tronixstuff has a detailed review of the differences between the real MAX7219 and the others: A few people have been asking me of late, and there’s only one way to find out … so over the last month I ordered eight random “MAX7219s” from different suppliers on ebay and will compare them […]
UV LED drawing Parallax robot
Gareth over at Parallax forum built this UV LED drawing Parallax robot: I have replaced the pen slot with a bar of downward pointing UltraViolet LEDs one placed central to the hole and the others fanning out….. This arrangement means that i can send the Propellers internal character-set (no costly data tables) to the UV […]
Controlling six 17-segment digits using three I/O pins
Wardy posted this article: Controlling six 17-segment digits using three I/O pins Decided to start making good use of my “Propeller Professional Development Board” (PPDB) which has been sitting sadly idle and forlorn on the bench for a while. Set a goal of making a simple video game with some of the advanced features available […]
Jeremy Blum remote controlled graduation cap
Here’s a cool remote controlled graduation cap by Jeremy Blum: Congrats to Jeremy Blum for graduating from Cornell University! He made a cool Remote Controlled Graduation Cap that he controls using a custom built wrist control box. The cap has an RGB LED in it and is capable of not only grabbing user submitted color […]
LED display matrix using PIC16F1847 and shift registers
Here’s Embedded Lab’s new PIC project: Making a 8×40 LED matrix marquee using shift registers: This project is about constructing a mono-color LED matrix display board that consists 320 LEDs arranged in 8 rows and 40 columns. The heart of this project is PIC16F1847 microcontroller which receives data from a PC through a serial port […]
Get in touch with your things – Souliss
Get in touch with your things – Souliss: The future of lights goes through LEDs because compared to standard lights they’re tiny, easy to control and consume low power. But what we were missing until now was a powerful yet straightforward hardware controller for everyone willing to use LEDs and strips on Arduino compatible boards, […]
RGB LED driven by PWM using Netduino
Embedded-Lab is doing a series of tutorials for the Netduino. The Day 7 tutorial of a series is RGB LED color formation using Pulse Width Modulation: Pulse Width Modulation (PWM) is a digital method of delivering a varying amount of power to a load, and hence can be used to control the brightness of an […]
LED lens converted to macro photography lens
Here’s an Instructable by ASCAS: Phone macro photography (HQ – using LED lens) You can purchase some macro lenses for your phone camera but with a bit of work and a spare LED lens you can make your own. Only thing to make sure is that the LED lens is high quality so that there aren’t […]
Power efficient, adjustable, light-sensitive switch using an LED
Power efficient, adjustable, light-sensitive switch using an LED: You can use an LED as a photoelectric sensor. A previous Design Idea shows that such a switch is highly power-efficient, consuming almost no power (Reference 1). However, you cannot adjust that configuration to switch at the desired light intensity. You can adjust the circuit in this […]
Mobile POV device uses Parallax Propeller
Here’s a unique mobile POV device using the Parallax Propeller. Gareth (chiprobot) designed this gadget using the Propeller MCU driving eight UV LEDs, blasting UV light onto a phosphorescent sheet of vinyl. He says the coding utilizes the Propeller’s built-in ROM character map, so code size is very small (i.e., no big data tables). You […]
Inside Minimatrix
In this video Nick Johnson demonstrates his tiny Minimatrix project and wrote a detailed explanation describing the build: While minimatrix is in principle a pretty simple device, there’s a surprising amount of detail that goes into getting it right – and some interesting lessons to be learned in designing and programming it. I thought I’d […]
Little Bird Electronics “Magpie” Arduino-compatible board review
Tronixstuff has a review of “Magpie” Arduino Uno-compatible board from Little Bird Electronics: Starting with the subject of this review – the “Magpie” board from Little Bird Electronics in Australia. It seems that a new Arduino-compatible board enters the market every week, thanks to the open-source nature of the platform and the availability of rapid […]
AZIZ: DIY LED microscope illuminator
Here’s an interesting project by Steve of Tangent Audio the AZIZ project, a microcontroller-based LED microscope illuminator: AZIZ is an LED microscope illuminator that I designed and built from scratch. It is designed around a Texas Instruments TLC59116 constant-current PWM LED driver chip, and an Atmel ATTiny1634 8-bit microcontroller. Check out the video after the break.
Rave shades: The self assemble LED glasses kit
Rave shades: The self assemble LED glasses kit These Rave Shade – LED Glasses look like a ton of fun. They are Arduino based and use 74HC595 shift registers to light all the LEDs. At first I though it was a silly design since with a PCB sitting on your face you would not be […]
Parallax Propeller discriminates Walsh-modulated IREDs
Parallax Propeller guru Phil Pilgrim has posted this IR sensor/discriminator project on the Parallax Propeller forums. “Almost everyone here is aware of the advantages of modulated IREDs for rejection of background IR fluctuations and line-frequency noise from artificial lighting. Typically, the IRED modulation occurs at 38 kHz, to which the integrated detectors are tuned and […]
LED Matrix link
MobileWill built this LED Matrix link project for his wedding: i just wanted to share my latest project for my wedding but i have also listed on tindie. I made a easy way to use the led matrix with the max7219. They are daisy chainable and i will be making a microcontroller add on as well. […]
Big 7-segment countdown timer
Paul over at Dorkbotpdx has written an article about his 7-segment countdown timer: The main challenge was driving the LEDs with a constant current, because they need about 10.5 volts across the several series LEDs. I wanted to run from 12 volts, so there wasn’t much voltage left over for the normal current limiting resistors. […]
Introduction to home automation
Introduction to home automation: We have all see some complex home automation systems, this video made by Jeremy from The Custom Geek gives a good overview of what is involved behind the scenes. This system lives in the garage and interfaces audio, video, phone, intercom, lighting and alarm system. Since the system is all connected […]