From the edge of space a tiny camera captures the dramatic curvature of the Earth, during a test flight that is one small step for Cambridge University students aiming to launch a rocket into space for under £1,000. - The Guardian
Cambridge University Spaceflight is a student run society founded in 2006 comprising undergraduates and postgraduates from many disciplines. We aim to develop the technology needed to reduce the cost of sub-orbital access to space for scientific research, in the form of high altitude balloon launches, designing rockets, and other related experiments.
One of the current projects is to build a radio module to be a replacement for the excellent, but large and expensive, Radiometrix NTX2.
A first prototype uses the Micrel MICRF112 10mW FSK transmitter with a varactor controlled crystal pulling arrangement. An onboard variable capacitor also allows tuning of the centre frequency to anywhere in the LPD433 ISM band.
This prototype was soldered up today and is working well. We hope to develop this technique further to produce a cheap & reliable radio capable of MFSK and DominoEX as well as the standard 50/300 baud RTTY.