IMG_6498
Sep
12
2014

Redundant Pressure Shield – cutdown

We have finished the pressure shield in its redundant configuration. It can work in a single standalone or dual redundant mode. Based on Arduino Elevens with custom shield. Uses a timer cutdown as well as air pressure measurements to shutdown the cutdown and “safe” the nichrome cutters.

Mar
19
2014

Arduino based Tracker – Habduino

We have taken delivery of an Arduino based APRS and RTTY tracker called Habduino. The Habduino uses a 10mW UHF transmitter on 434.650Mhz and a 300mW VHF transmitter on 145.175Mhz for APRS. The Habduino was developed by Anthony Stirk.   We built a 70cm UHF dipole 1/2 wave antenna  and used our existing 2m VHF […]

Mar
12
2014

Balloon Flight Simulator on Arduino

We are still in the process of building a redundant cutdown device to meet CASA medium balloon regulations. The redundant cutdown needs to be able to respond to condition on its own without intervention from the ground, so we have developed a balloon flight simulator that runs on the Arduino along with the cutdown code. […]

Feb
23
2014

Pressure Shield Testing

To comply with CASA regulations for medium balloons we need to fly redundant cutdown systems. Our design uses Ardunino’s (Freetronics Eleven) devices as the heart of the redundant cutdown. We have opted to use a pressure sensor to let the Arduino know if its going up, floating at the same altitude or falling. Our initial […]

Oct
18
2012

Temperature DataLogger complete

We have finished the programming and testing of our temperature datalogger. The temperate datalogger is our science payload for the first flight and will record the temperature on the way up and way down. The temperature data when compared to our tracking altitude will  allow us to identify the altitude of the layers of the atmosphere of […]

Sep
09
2012

More Arduino Coding

This week we have been doing some more Arduino coding. We now have the piezo buzzer attached to the arduino and its programmed to beep for 1/2 a second every 20 seconds. It is beeping at 3000Hz so its a high pitched beep. We could hear it at least 15m away through a couple of […]

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