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App note: Control high-voltage LEDs with low-voltage pins
rsdio writes: Although this circuit does not directly show how, you can use the same idea to make a 3.3 V tolerant I/O pin control an LED with a much higher voltage. The caveat is that all of the...
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App note: LED brightness controller with 64 taps
An app note on a LED brightness controller: In this circuit, a digital potentiometer (DS1869) aids an LED-driver IC (MAX16800) in providing manual control of the LED brightness. The circuit also...
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Partlist Wednesday: LEDs
Every Wednesday we highlight a component from the updated partlist. This week: LEDs. Surface mount LEDs feel a bit smaller than capacitors and resistors in the same package. Despite moving to 0603 C...
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7400 competition entry: Animated LED Christmas sign
Raj entered his Animated LED Christmas sign into the Open 7400 Logic Competition. Having already build a PIC controlled version, he wanted to try and control the sign using discrete logic only. The...
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ExpeditInvaders: IKEA Expedit shelf modified with RGB LEDs
Michu shared his IKEA Expedit shelf RGB LED mod ExpeditInvaders. He connected 40 RGB LED modules and a keyboard to an Arduino to make a color changing Ikea bookcase: I just finished my project...
View ArticleHow LEDs are made
Ever wondered what goes into the process of making LED goodness? Here’s a how-to video from OSRAM on the basics of LED manufacturing. Via Adafruit.
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Water LED Art: Making LEDs light up with water
Christopher Woodall from HappyRobotLabs shared this Water LED Art: Making LEDs Light Up With Water: I wrote up a little explanation because the BUILDS hackerspace at BU wants to recreate the wall for...
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High efficiency battery boost regulator using the MCP1640
Giorgos over at PCBheaven made a MCP1640 boost converter for his camping LED light project. It’s designed to squeeze every last bit of energy from the batteries. What i want now, is something to spice...
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Homemade LED wristwatch
Montspy was inspired by Mats’ DaTajm wristwatch so he made his own, the LED wristwatch: It has 12 red LEDs to display hours and slices of 5 minutes. And 4 orange LEDs to obtain a minute-precision...
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Nomech mini, a 4×4 capacitive touch button grid
Kasbah posted his Nomech mini project, a 4×4 projected capactive touch board using Atmega32u4 and back-fire LEDs for each button in the project log forum: It fits SoB 100x80mm but the top acrylic will...
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Nomech mini, a 4×4 capacitive touch button grid
Kasbah posted an update on his Nomech mini project we covered we previously: So after some wrangling with the code I got the charging and discharging of the sampling capacitor working. CH1 is the...
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PCB a Week 22: TraId – Transistor type & pinout identifier
Mats continues his challenge of designing one PCB every week. In week 22 he came up with TraId – Transistor type & pinout identifier: TraId is a really low cost version of the Part Ninja. It’s...
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Executive Decision Maker Pro
Bertho shared his Executive Decision Maker Pro in the project log forum: Making decisions is a hard thing to do, so it seems to most of us. The creation of the original Executive Decision Maker has...
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MEGA MINI assembly, part II
Kevin Rye posted an update on his MEGA MINI project: This was just supposed to be a proof of concept for the GPS clock; basically a trial run. However, it could very well be a finished project on its...
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Use an LED as a sensor
Michael Beyhs shows us how to use an LED as a sensor: How the code works: Configure all analog inputs to outputs and pull low to turn on all red LEDs. Turn one analog input pin into an actual Input...
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Proto I/Os Arduino
Ricardo of Electropepper writes about their latest project: Now i want to show you my most recent project, an arduino shield aimed for prototyping, it has 8 LEDs, four buttons a buzzer and a...
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Digital Zoetrope
Sholto wrote this instructable detailing the build of his digital zoetrope: A zoetrope is a mechanical device that animates a series of pictures by spinning them fast enough that the images appear to...
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DirtyPCB IKEA Samtid mood-light upgrade
madworm writes: Just wanting to share one of my latest projects, made possible by DirtyPCBs. I got a lot of good boards (actually 2 designs) and saved 25$ using this service. Very nice. It’s a simple...
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Controlling a PiGlow with the Bus Pirate
Aaron Brady has written an article on controlling a PiGlow with the Bus Pirate: PiGlow provides 18 dimmable LEDs and is designed to be used with a Raspberry Pi. It sits right on the GPIO header of the...
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Running LED dice
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...
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