- #1
goobley
- 2
- 0
Hi all,
I'm currently trying to build a sort of anemometer using an old computer fan. I have the hardware side of things set and was able to get my voltmeter on it whilst it was spinning, unfortunately it puts out somewhere between 1 and 8mV, which was a little less than I was hoping for as the other models i tested put out about 500-1200mV. However they are not suitable for this task.
I have tried boosting this signal using an old op amp I had (an ne5532p) but have had no luck (possibly due to no switching power supply on it). I've also tried an npn transistor amp, but unsurprisingly I have no transistors that will flip at such low voltage.
If anybody has any ideas about what component to use to boost this signal, to about 500-3000mV I would be very grateful
Thanks in advance
Chris
I'm currently trying to build a sort of anemometer using an old computer fan. I have the hardware side of things set and was able to get my voltmeter on it whilst it was spinning, unfortunately it puts out somewhere between 1 and 8mV, which was a little less than I was hoping for as the other models i tested put out about 500-1200mV. However they are not suitable for this task.
I have tried boosting this signal using an old op amp I had (an ne5532p) but have had no luck (possibly due to no switching power supply on it). I've also tried an npn transistor amp, but unsurprisingly I have no transistors that will flip at such low voltage.
If anybody has any ideas about what component to use to boost this signal, to about 500-3000mV I would be very grateful
Thanks in advance
Chris