A simple CANSAT KIT Jens Dalsgaard Nielsen Section of Automation & Control Student Sat Lab Aalborg University – Denmark jdn@es.aau.dk http://www.studentspace.aau.dk

The overall Goal Why building student satellites and cansats ? The students We think space is interesting We would like to do space stuff We would like to become space engineers Educational site/the teachers We think space is interesting :-) We will educate “the best engineers in the world” ;-) We will attract even more students to our university ...

so - Let's get it done

The method – CANSAT kit - a pre cooked solution We will measure on nature collect information process information and ... carry all this out in context of math, physics, biology etc

at a modest price arduino ~ €20 shield ~ 0 radio ~ €30-45 sensors (3 axis accelerometer, pressure, temperature) €35 in total less than €100 or so

Where will we end ? 1 2 4 3 5 6

Temperature Simple sensor Easy to handle Slow due to mass calibrated ab fabrique

PRESSURE

Accelerometer MMA7361L 3 axis MEMS tech +/- 1.5/g G

Arduino as measuring device All analog inputs measure 0-5V simple simple simple ... Measurements are represented as an integer 0-1023: 0V ~ 0 5V ~ 1023 2.5V ~ 512 etc – just a matter of scaling – by you ! (primitive instrument)

Arduino measuring Voltage - WARNING Input voltage must be in range [0-5] V If you go above you kill it – or at least destroy input port If you go below --------------------------''----------------------------- SO BEWARE ELECTRONICS IS DRIVEN BY SMOKE ... PROOF ?

Arduino measuring Voltage - WARNING Input voltage must be in range [0-5] V If you go above you kill it – or at least destroy input port If you go below --------------------------''----------------------------- SO BEWARE ELECTRONICS IS DRIVEN BY SMOKE ... PROOF ? when smoke get's out it stops working ...

step by step for every sensor/interface soldering and mounting Sensor sensitivity and calibration temperature 20C ~ 20*10mV = 200 mV ~ (200/5000)*1023 = 40-41 Accelerometer see data sheet (is NOT calibrated when manufactored) Pressure/height see data sheet – (is calibrated when manufactored)

Missing ? Hands on assembly and test of kit Experiment planning what to measure sample rates telemetry robustness issues – (data preservation) Planning of experiment what, who, Programming skills just do it

One more thing...

It's not all about space It you can do space you can do anything :-) Environment sensors for CO2, NOX,... Health testing running style (acceleration on knees,...) alarm systems just fantasy sets the limit (I know its big words)

Two minuttes TV kitchen (but nothing is pre cooked!)