Hello,
I want to convert the frequency signal from this flow sensor:
to a voltage from 0-10V
The input voltage is 12V DC
The max frequency is 80Hz the normal operating frequenc is 48,85Hz
At the moment i put an Pull-Up Resistor parallel to the NPN to make a PNP. The Amplitude Voltage is max 9,2V
Can someone help me, i don`t know how the circuit design for the input at pin 1, must look like with an open collector (or the PNP)? And how i can calculate then R1, C1 and C2 or other needed resistors?
I calculatet for the regular minimum component tacometer:
R1 = 100K Ohm
C1 = 0,1µF
C2 = 10µF
i get an Vout of 9,6V at 80Hz.
Thanks to everyone!