If the anometer just sends a blip every cycle (clock cycle?), then isn't it a digital signal? Could you use an RS-232 port to listen to this signal? Or if the signal level is not high enough (RS-232 is 10V), then could you build a simple amplifier circuit and add a MAX-232 chip and then use a serial port? Just a few ideas. | [reply] |
Hmm, all very interesting. The digital/blip signal would almost work but there's more to it. (there is layers of info that isn't just blips unfortunatly) I was using that as an example. I know about the voltage issues, I won't blow my circut as these are non powered devices, I'll have to get them power (different issue, I'll figure that much out) but I won't blow my board luckily.
The max-232 chip is where I was originally starting. I have a friend who's pretty good with circut boards and soddering so. . .
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On the hardware end, all analog input ports are not the same. Different interfaces require different voltages, currents and assumed sampling rates. So the first thing to do is to check your anemometer manual for specs, lest you fry your port.
If it is compatible, the mic input of a sound card may be easiest. Use whatever program you want to record a wav file and use perl to drive the recording program and analyze the wav file(s).
I don't know of any perl modules that drive sound cards directly, but if you have the card specs, it seems that one could cook up the correct ioctl calls. Using a third party program is probably easier, however.
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[d/l] |
I'm not sure which module to use (not a game programmer) but the game port on a PC uses analog input.
Jon | [reply] |