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The limited mass available to Beagle 2 means that whenever possible
the electronic systems have been gathered together so that common
functions are not duplicated and connections are short. There
is no space for a discrete electronics box. Instead, five circuit
boards, of a far from standard shape, are mounted directly onto
the lander base. For thermal reasons, the electronics' boards
and battery are situated in combination, one above the other.
Extensive use of a 32-bit processor is made as software is obviously
lighter than logic circuits and more flexible. The only way
that Beagle 2 can achieve its mass goals is by having no redundancy
in its electronics whilst relying on a robust and failure-tolerant
design.
The "Common Electronics" provide the lander with
power management and conditioning, power converters, the central
processor, descent electronics, pyrotechnic supplies, motor
drives, data handling and experiment interfaces.
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