What computers or microprocessors are used in the EyasSAT?

The C&DH board uses an Atmel MEGA128. In Rev A EyasSAT the other modules used the Atmel AT90S8535 (or Mega8535).

The current model (Rev C) uses ATMega128s throughout.

Using these is one way the power consumption has been kept low enough to run on batteries for an hour or so in the lab. These processors are very well supported by CodeVision.