This graph logs power dissipated vs air speed of a TO92 held at a constant 31 °C above ambient. P_W = 31/Z_T

Authors	Stephen Woodward
Main Document	Article «Phantom-powered solid-state linear airflow sensor»
Description	Figure 1
File Format / Size	PDF / 7 Kb
Document Language	English

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Article «Phantom-powered solid-state linear airflow sensor»

Figure 1. This graph logs power dissipated vs air speed of a TO92 held at a constant 31 °C above ambient. P_W = 31/Z_T
Figure 2. This circuit implements a phantom-powered Darlington anemometer with a 40-140 mA current mode output. Adjust R10 to calibrate 40 mA (zero fpm), and R11 to calibrate 140 mA (250 fpm). The adjustments interact so some iteration may be necessary. Sorry 'bout
Figure 3. This graph logs Q1 power dissipation vs collector current
Figure 4. This graph logs anemometer output vs airspeed. FPM = 2.5(I_OUT - 40 mA)

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Microcontrollers