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Kinslayer
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Ok, admit to absolute naivety in this subject, so please excuse any glaring errors and ignorance in this question :)
I have a device which according the specs emits a 0.5 Hz square wave that is bipolar and assymetric. The current ranges from 0 - 1000 mA.
Figuring that this was a safe enough current to play around with, I connected it to the mic-in on my soundcard (I don't have a line-in). As expected, I could hear a clicking sound every second. In a sound editing program, I see a relatively straight line at 0 with short spikes in 1 second intervals to either +1 or -1 (not exactly the square wave I was expecting, what do I call this?) (see attachment below)
Ok now here comes the real ignorance part: I was hoping that by playing back this sound file and connecting to the line-out, I could get the same effects as the original device. This doesn't happen. Why? :) (I have some ideas but I'd rather not voice them :) - it sounds exactly the same though).
For starters, I have err.. one of those screwdrivers witht he LED inside of it (what do you call these? , and used it to complete the circuit. In both cases, with no output the light remains on. With the original device, once I raise the current sufficiently the light is either on or off each second. From the PC, there is no effect.
What do I have to do/build/use to make this work?
Thanks alot!
Gadi
I have a device which according the specs emits a 0.5 Hz square wave that is bipolar and assymetric. The current ranges from 0 - 1000 mA.
Figuring that this was a safe enough current to play around with, I connected it to the mic-in on my soundcard (I don't have a line-in). As expected, I could hear a clicking sound every second. In a sound editing program, I see a relatively straight line at 0 with short spikes in 1 second intervals to either +1 or -1 (not exactly the square wave I was expecting, what do I call this?) (see attachment below)
Ok now here comes the real ignorance part: I was hoping that by playing back this sound file and connecting to the line-out, I could get the same effects as the original device. This doesn't happen. Why? :) (I have some ideas but I'd rather not voice them :) - it sounds exactly the same though).
For starters, I have err.. one of those screwdrivers witht he LED inside of it (what do you call these? , and used it to complete the circuit. In both cases, with no output the light remains on. With the original device, once I raise the current sufficiently the light is either on or off each second. From the PC, there is no effect.
What do I have to do/build/use to make this work?
Thanks alot!
Gadi
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