FREE CIRCUIT DIAGRAMS 4U: Air Flow Detector

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Sunday, November 08, 2009

Air Flow Detector

Here we have used an incandescent lamp as L1.When the bulb is getting heat the resistance will be increased.As air flows over the filament it cools down, thus lowering it's resistance.If you want to see the amount of air flow.You can use a meter for that..And I hope to give you HHO Technology so at that situation this circuit will be so usefull Still We do some test on it.

Parts:

C1 47uF Electrolytic Capacitor
R1 100 Ohm 1/4W Resistor
R2 470 Ohm 1/4W Resistor
R3 10k 1/4W Resistor
R4 100K 1/4W Resistor
R5 1K 1/4W Resistor
U1 78L05 Voltage Regulator
U2 LM339 Op Amp
L1 #47 Incandescent lamp with glass removed
D1 LED

Note

# You have to brake the lamp with out removing the filament.