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16 Feb 2011

Frank documented his music playing alarm clock build. [via]

This Instructable has 18 steps (with demo examples for each building block) and 5 appendices, with about 90 files and pictures, including logic analyzer files/screencaps, expected terminal output, USB device dumps. I sincerely hope you explore all my efforts. I covered everything from SD cards, FAT file system, USB mass storage, IR remote control, LCDs, RTCs, and decoding MP3s. It’s built using a Teensy++ and encased into a SparkFun shipping box.

Musical alarm clock in a SparkFun box – [Link]

16 Feb 2011

Frank wrote a python script that reads the sht1x/7x temperature and humidity sensors using the Bus Pirate. Script source is in SVN. [via]

Bus Pirate: Python script for sht1x/sht7x sensors – [Link]

16 Feb 2011

Here’s a followup to the open source hardware logo post. NBitWonder has some of the design candidates in an open source eagle library. [via]

Open source hardware symbols for PCBs – [Link]

16 Feb 2011

Sjaak found another WIFI development board with a PIC24FJ and MRF24WB0MB wireless module at Sure Electronics.

This is similar to the OpenPicus we covered earlier, but not open source and without the friendly development environment. [via]

WIFI development board with a PIC24FJ and MRF24WB0MB – [Link]

16 Feb 2011

Logisim is an open source educational tool for designing and simulating digital logic circuits. With its simple toolbar interface and simulation of circuits as you build them, it is simple enough to facilitate learning the most basic concepts related to logic circuits. [via]

Logisim: graphical design and simulation tool – [Link]

16 Feb 2011

machinegeek writes:

mekonik has published complete details on his Arduino magnetic levitation project. Not content to settle for a typical “hello world” LED blinker as his first project, he supplemented the Arduino with an electromagnet, Honeywell SS19 Hall effect sensor, MC3401P op amp, NPN transistor and 1N4001 rectifier. The circuit essentially uses the small Hall effect sensor to sense the field of the permanent magnet and uses that information calculated by the Arduino to control the modulation of the magnetic field of the electromagnet. Pretty cool!

Arduino magnetic levitation project – [Link]

16 Feb 2011

blog.makezine.com writes:

It’s true – I love DACs. There’s something awesome about the role they play, translating information from one paradigm over to another form. Sure, you can pick up a precision DAC chip with serial interface for a little over a buck, but building a barebones version from a handful of resistors is a pretty dang sweet trick. If you’ve never built one, I do recommend it. Doing so has a way of demystifying all sorts of related circuits and processes.

Collin’s Lab: Digital to Analog Converter – [Link]

16 Feb 2011

DOTKLOK: Game Time from The Latest Artists on Vimeo.

Andrew O’Malley’s writes:

DOTKLOK is an open-source, hackable, Arduino-based digital clock that displays a series of unique time-telling animations. The passing of time is depicted with numbers and abstract/geometric patterns such as Morse code and minimal analog clock faces, and includes animations inspired by classic video games such as Pong, Tetris, Pacman, and Space Invaders.

Arduino-Based Digital Clock – [Link]

16 Feb 2011

redryno1221 writes:

This instructable will show you how to make an electronic dice with minimal experience using 7 LEDs, resistors, jumper wires, and of course the arduino (or arduino clone). I wrote this instructable for anyone to easily follow along and learn more about the arduino. Questions are welcome and will be answered as soon as possible. For less experienced users the code for the arduino is in “longhand” and several comments are included for better understanding of the code being uploaded into the arduino.

Arduino electronic dice (using random numbers) – [Link]

16 Feb 2011

The brief history and technology in capacitors by Jeri Ellsworth, this is part of A – Z of electronics series. You can view A and B here! [via]

C is for Capacitor – A to Z of Electronics – [Link]





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