So what can you put into a TiS CubeSat frame? The answers are as varied as the sciences. Electronics comprise the bulk of most experiments, even life sciences. They perform monitoring and data collection duties. Here are few option and source links to get you started.

Arduino Uno
This is the workhorse of the maker-space movement and for good reason. Easy to to program and expand, this micro-controller is great for any sort of sensors you can think of. There are lots of source for code as well, starting with www.arduino.cc.

SparkFun and Adafruit are good sources for the hardware. Amazon has some decent deals on them as well.

https://www.sparkfun.com/products/11021

https://www.adafruit.com/product/50


Data Storage
For data storage both companies have excellent microSD breakout boards that will do the job.

https://www.sparkfun.com/products/13743

https://www.adafruit.com/product/254


Weather Monitoring
A simple sensor setup would be to use the Aduino with a data logger to report basic weather elements. The DHT22 temperature and humidity sensor.

https://www.sparkfun.com/products/10167

https://www.adafruit.com/product/385


Location Tracking
Another great experiment would be to incorporate a 9 degree of freedom sensor board. This would allow you to track and record the CubeSat’s position, orientation and magnetic position. This makes for a great second project.

https://www.sparkfun.com/products/13762

https://www.adafruit.com/product/2021