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28 Aug 2011

OpenDNS Datacenter Monitoring Station @ NerdKraft… [via]

An Arduino + TI TLC5940 driving 12 LEDs and 12 analog gauges. Displays server load relative to previous day’s maximum updating every second.

OpenDNS Datacenter Monitoring Station - [Link]

28 Aug 2011

Hiduino: A firmware for building driverless usb-midi devices using the arduino microcontroller from Alexander Refsum Jensenius on Vimeo.

HIDuino is a firmware package that allows you to easily implement MIDI over USB using a standard Arduino UNO. It has been out for several months, but this talk from NIME2011 elaborates on its history and how it works. Sadly, the audio cuts out around 7’20″, so after that you’ll just have to watch the slides. [via]

This paper presents a series of open-source firmwares for the latest iteration of the popular Arduino microcontroller platform. A portmanteau of Human Interface Device and Arduino, the HIDUINO project tackles a major problem in designing NIMEs: easily and reliably communicating with a host computer using standard MIDI over USB. HIDUINO was developed in conjunction with a class at the California Institute of the Arts intended to teach introductory-level human-computer and human-robot interaction within the context of musical controllers. We describe our frustration with existing microcontroller platforms and our experiences using the new firmware to facilitate the development and prototyping of new music controllers.

The talk is given by Dimitri Diakopoulos, and you can download the PDF of the white paper from his website.

Hiduino: An Open-Source Firmware for Arduino MIDI Devices - [Link]

26 Aug 2011

This is just a quick video showing that you can power an AVR project from a fried servo or an old emergency cell phone charger.

Arduino Project Alternative Power Sources - [Link]

22 Aug 2011

This is a simple power meter to analyze (with LabVIEW) the current consuming in a house using the led indicator of a house energy meter. Reading the red led of a home energy counters the system detects the correct consumption in a house. It is a noninvasive method, not cut wire, no current disconnects, so a very interesting method…

The system consists of two parts: the Arduino board that detects the led pulses and sends the data via the XBee module, and a PC that receive the data through a USB/Xbee module and processes the data with LabVIEW so you can prepare and study the consumption in a very instant. Arduino sends two data to the PC: 1 – Real time datas 2 – Average consumption measured in a time of 5 minutes.

Real-Time Energy Monitor with Arduino and LabVIEW - [Link]

13 Aug 2011

Let’s say that you’re trying to drive a few Nixie clock tubes, or you want to make a strobe light. A variable high voltage DC power supply from 50-200+ volts may be required. Transformers are terrific, but difficult to find the right one and a pain to wind. Why not use a boost converter? They’re easy and don’t necessarily require a guru for basic operation. This guide is meant for the individual who wants to build a simple boost converter, and may need refreshing on the theory. It will also help determine what parts will be required.

Boost Converter Intro with Arduino - [Link]

12 Aug 2011

daisyworks.com writes:

We’ve built an Arduino derivative with Bluetooth, IrDA, SD Card, servo ports, and RJ telco jacks for plugging in various sensors / controls.  With our boards, you can also do FOTA over Bluetooth on your Android phone or desktop (Mac/Linux/Win).  We have an App Store repository that lets you download the firmware and FOTA it onto the device, and then interact with it via a user interface.

DaisyWorks: Internet your thing - [Link]

25 Jul 2011

For most of us the closest we will ever get to space is by doing some high altitude ballooning (HAB). For a while I have been researching the options for different types of telemetry/control systems and found some that where not Open Source, costly and/or lacked the features needed to make a successful trip. But as luck would have it I happened to stumble across the Trackuino project by Javier Martin. The feature list fits all the requirements I was looking for and it’s Open Source! [via]

  • GPS: Venus 634FLPx. Reports okay above 18 Km.
  • Radio: The board supports Radiometrix’s HX1 (300 mW) as well as Argentdata’s MX146-8v (500 mw).
  • 1200 bauds AFSK using 8-bit PWM
  • Sends out standard APRS position messages (latitude, longitude, altitude, course, speed and time).
  • Internal/external temperature sensors (LM60) to read temperature in and outside the payload
  • Support for 1 capacitive humidity sensor
  • Cut-down aka “suicide” mechanism: you can hook up a nicrom wire and cut the payload line if your balloon gets stuck aloft for a long time.
  • ICSP header for in-circuit programming
  • 2 x SMA female plugs (1 x GPS in + 1 x radio out)
  • Open source (GPLv2 license), both software and hardware. In other words, do whatever you want with it: modify it, add it to your project, etc. as long as you opensource your modifications as well.

Kyle Crockett took the original Trackuino idea and designed a Trackuino shield. Just plug it on top of an Arduino and you have an APRS tracker!

Trackuino An Arduino APRS tracker - [Link]

24 Jul 2011

Andyx writes – [via]

This is a work in progress project which uses a Solar charging MintyBoost to power an Arduino with a Proto Screw Shield on it. Attached is a 2X16 LCD using the I2C Backpack, a DHT22 Temperature and Humidity Sensor, a Waterproof DS18B20 Sensor and a 5V analog PH Probe/Adapter.

Solar Minty + DHT22 + Waterproof DS18B20 + PH Probe - [Link]

24 Jul 2011

Most of us simply can’t afford an industrial reflow oven and this pain was also felt by the folks over at Rocket Scream Electronics. So armed with an idea and some help from the Adafruit Reflowduino sample code, the Reflow Oven Controller Shield was born. The shield is based off the familiar MAX6675 Thermocouple Amplifier and the PID library written by Brett Beauregard.

Toss in a few solid sate relays (SSR) and a K-Type Thermocouple, like the ones Adafruit has here, and your good to go. I like the idea of a standalone PID controller as it’s one less PC controlled device to worry about. [via]

Reflow Oven Controller Shield - [Link]

21 Jul 2011

Arduino Simulator – [Link]

This Arduino Simulator app gives the user the freedom to work without the basic setup of hardware and software. It is designed to be used by beginners and also, experienced developers, who want to quickly develop Arduino projects.

The developer can make the necessary changes in the code – delay, pin number, and state – 0 (low) 1 (high) – and check it immediately. The app shows the breadboard, complete with 14 LED pins.

You can drag and place the wires in the correct positions to connect to Arduino. If the wires are placed according to the code, then it will show the expected results. Once satisfied, you can save it and email it. The code can be copied and used in an actual project just as easily.

This app is an easy way to work through Arduino projects. With customisable codes, and a simple to use interface, this Arduino Simulator app from Schogini Systems is a convenient app for Arduino developers.

Arduino Simulator - [Link]





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