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.
Trackuino An Arduino APRS tracker - [Link]
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]
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]
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]
TJ writes – [via]
I made a sprinker system controller using arduino and your RTClib (thanks!). It has telnet features using a wiznet module to remotely control it and configure water schedules. I’ve also open sourced the code on github for anyone who’s interested.
Arduino water sprinkler control - [Link]
Build a ‘Klout Klock’, track your influence and time… [via]
Klout exposes a web service enabling developers to build mash-up applications around its metrics and all that is required to play is an API key which is easily obtained when registering an application. My application is the “Klout Klock” device and before getting into the details of building it, you can see it how it works in this video…
The clock is built using a Netduino Plus and an AdaFruit ST7735 TFT screen. I have described how to connect them together in a previous post here. In that post, I had indicated that managing such a TFT screen from a Netduino was sub-optimal due to the memory requirements involved. That statement is even more true with a Netduino Plus which has roughly 28KB of RAM available for an application. This means that allocating a 40KB buffer to manage the TFT display as I was doing it previously is out of the question.
Build a ‘Klout Klock’, track your influence and time - [Link]
András Veres-Szentkirályi found an old CGA monitor and wondered whether it could be repurposed for use with an Arduino. He noted that CGA monitors use inexpensive DB-9 connectors, the signals are TTL (0-5V digital), the
clocks are in the range of cheap microcontrollers (HSYNC is 15,75 kHz, VSYNC is 60 Hz), and yet 640 by 200 pixels can be drawn in 16 colors.
He dug through old technical data on CGA and worked up the necessary code, posting the results on his blog.
He believes further development is possible to clean up the timing, so his next step will be to use plain AVR C/C++ code to avoid Arduino overhead allowing finer control over the timing. He would also like to create a character map in the Flash (PROGMEM) and code up a library that would allow the display of text or simple graphics.
Arduino driving CGA display - [Link]
LabVIEW Interface for Arduino Thanks Jose!
The LabVIEW Interface for Arduino (LIFA) Toolkit is a FREE download that allows developers to acquire data from the Arduino microcontroller and process it in the LabVIEW Graphical Programming environment. For more information, check out the Getting Started with the LabVIEW Interface Toolkit video tutorial from VI Shots.
LabVIEW Interface for Arduino – [Link]