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

progress

After cutting and grounding the tips of passive and active sensors, the 100 Hz noise is move away. For measuring the clamp temperature, the chip TMP01F from Analog Devices is used.

Meanwhile we received a new sensor from Vereta, which is now a so called "Gefühltetemperatur Sensor" or perceived temperature sensor. The output are two linear voltages 0 - 5V DC represented air and perceived temperature 25 – 37 Celcius.

Now I jump to MICA programming as it is almost 3 months working on the sensor hardwares. The TinyOS Tutorial is available here.