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The analog part of the circuit uses slow LM324 opamps that work poorly at ultrasonic frequencies, and their input polarities are backwards.
The input capacitor's value is so tiny that it passes frequencies only above about 1MHz and the feedback capacitor's value is so big that it cuts frequencies above about 7kHz.
It seems to provide everything I need: factory calibrated, analog output, and low wind speed sensing. However, I can't seem to find a price or vendor for it. Has anyone purchased a texas electronics product before?
It seems to provide everything I need: factory calibrated, analog output, and low wind speed sensing. However, I can't seem to find a price or vendor for it. Has anyone purchased a texas electronics product before?
Hello, I made a comercial wind sensor / anemometer using an off-the-shelf detector (egg cup style) as I remeber this was a cheap item, if you want I can try and find the item again.
I use a 16f627a to count pulses from the sensor, and display them on 8 leds, there is a button on the unit to set an alarm point that triggers when the desired led lights.
Let me know if this is of any interest to you, oh and this would run from 3V
Thank you Matt, can I get a PM with more information regarding that?
I found this circuit while searching online: **broken link removed**
This circuit seems to be almost exactly what I want (basically the analog voltage output), except that the given values for R1, R2, and R3 only measure up to 250fpm of air speed. No one on that website, or the original creator's website, has information on how to provide values for R1, R2, and R3. Anyone have ideas? I'm sending off an email to the original creator of the circuit to see if I can find out more.
Hello, the company that supplies the sensor is **broken link removed**
Sorry, I havn't got a part number for the sensor, but I do know that they have 2 magnets on the shaft pulsing a reed switch so very low power needed to detect the pulses
I can't PM or post the hex for this, as this unit is still in production, but I may be able to give you some info for this sensor regarding speeds and possibly some detection asm.
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