to do

mica sensor board : http://www.cs.berkeley.edu/~awoo/micasb

functions :
TOSH_SET_INT1_PIN();
TOSH_CLR_INT1_PIN();

calculate and measure current of pulsmessuhr

find a step up / dc boost converter from 3 V to 5 V (for heater) and -2.25 V (min, for INA114 ) -> hochsetzer, LT1301, price 6,90 €, Conrad

Components :

2 x INA 114
Vin, min : +/- 2.25 V
Current : +/- 3 mA (max)

1 x TMP01
Vin, min : 4.5 V
current : 0.4 - 0.5 mA

Heater (measure with Stromzange)
Vin : 5 V
Current : 15 mA

Step-up dc converter, LT1301
Vin : min 2 V
Vout : 5 V, 250 mA

MICA
Vin : 3 V
Current : processor 8 mA + tranceiver 20 mA