If you scroll down you will find a video of the theremin. You will notice a wobbly effect. The hand clearly changes the frequency, but I found the same wobbled effect of the notes. They seem to be constantly changing. So even when my hand is not there, the frequency changes.
I thought that it would be better if there was a single note/frequency. I am trying to demonstrate how a theremin works. Thus, is it possible to get rid of this wobbled effect and get a single note. I have no clue why that effect is there in the first place.
My second question is: I built his circuit on a breadboard and hooked it all up. My only problem is that the sound is much quieter than what he has. Is there any way for me to increase my volume.
I can’t seem to play the video on that blog, not with IE 10 or Chrome. Hard to say what could be the cause without the schematic, or the code of the arduino. As the latter is supposed to be able to sense the feedback on the lc oscillator.
The circuit is using the gates as amplifiers to increase the sensitivity. The problem maybe the circuit is picking up electrical interference from appliances, AC power wiring, radio stations, and whatever electronics in the vicinity. The circuit is responding to the noise it is picking up. This is cause of the changes without a hand nearby.
