Our secondary mission and the I2C protocol

Our secondary mission, as we have sayed preveously in our blog, consists on making a 3D map of the zone where it lands. In orther to do so, we have decided to separate the two cameras from each other about  24 centimeters. A new challenge was encountered: how to separate them. After a lot of thinking and trying a wide range of possibilities (using the force of the parachute, using every kind of little motors...), we agreed to use a linear actuator to separate them. Using a quite simple mechanism, we are able to separate the cameras the way we want to.

The I2C protocol is a way to transmit data that allows us to connect up to 128 devices. With a velocity of about 100 Kilobytes per second in its standar mode, the protocol allows us to connect multiple eslave devices using only three pins of the arduino. As how we have already sayed, the protocol I2C only requires three lines: two for the data transmision, the SDA (data transmision) and SCL (clock); and another one to ground GND.
We are using  three sensors in our CanSat: The eeprom, acelerometer and magnetometer sensor and the pressure and temperature sensor.