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Arduino Optical Theremin
Yeah, I got one wrong too :D Thank you Telecobyte94
Yeah, I did the same thing as kate_delaney. Thank you Telecobyte94! :D
Thanks to Travomatic's edits! I made it with a pair of 2W speakers! Delighted!
Thanks so much for including the line numbers of the changes you made - I missed one and got an unrelated error message and was totally flummoxed!!
Think of it this way.You can send low, bass notes (100 cycles per second, or hz) through your rig. Imagine the headphone or speaker diaphragm (and thus, your eardrum) vibrating back and forth 100 times per second to move the air.You can also send high, treble tones (perhaps 10,000 hz). But video signals (up to 4,000,000 hz -- 4 mHz) must carry far more complicated information, so the frequency used is much, much higher than even the highest treble notes. You've simply exceeded the abilities of your amplifiers.Since the frequency of light waves (the laser) is far higher than video (in the same way that a video signal uses much higher frequencies than audio), your idea might work if you replaced the amplifiers with versions that can deal with video frequencies.You need video amplifiers, but you're using audio amplifiers. Any extra light will create video noise (scratchy image) instead of audio noise. You'll use simple bandpass filters to remove that noise.
I might be wrong -pretty new at this stuff- but it looks like you have the jumper cables for A0 and Ground switched around. Maybe try that?
sweet! my first go at a project, with my new arduino that i just got. took a little bit of tweaking on the code to get it to work, but with help from others comments, and some figuring it out, i got it to work, using the logfreq instead of logf.... though i cant seem to get it to calibrate? it goes on, and works for 5 or 10 sec. and then goes to a flat low note, and stays there, i changed the delay variable to 100 which buys some more playing time, but still comes to that same result, just after a longer time. any advice on that? thanks! cool build !
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