Wire the control volume
box output with a 1/4"
Mono Jack
so you can plug
in a guitar cord to connect it to a guitar amplifier.
A guitar amp is preferred because they are more sensitive than a keyboard amp, plus some have special effects.
To feed the audio
signal
into your computer from the 1/4" jack on
the volume box you would use a mono 1/4" to 1/8" Stereo
Adapter plugged into the volume box.
Then use a double sided male 1/8" stereo cord with
a length that reaches your computer.
1a.
The simplest remote volume CdS
Sensor Circuit could be placed in a box mounted on stand.
Mount the capacitor C1-.22 uf off of a SPST 1 bypass switch to flip
it in or out of the audio signal path when desired. You could
also mount a second SPST 2 bypass for a sound Mute Switch.
The CdS photo resistor would be recessed slightly looking upward
through a top hole in the enclosure. This setup could use a mono-jack
& cord.
1b.
With a stereo jack at the theremin you could
combine 1a & 1b using a three wire cable to the remote volume box.
You could then set up remote "Null Point" tuning
using the R-Tune setup on the theremin board.
This would work by connecting the third wire through the stereo cable
into a low ohm potentiometer (25 ohms?) to ground. This works on my test bench, I have
yet to try it in the real world. Don't forget to have the C13 .1 uf
capacitor mounted on the theremin board.
2.
The dual voice
LED 1 & LED 2 from the RS Illusion board could mount at the
volume box to make use of the hand held solar cell
volume technique. To do this you would need to have a
second extra 1/8"
stereo jack for the three
wire connections, one being the lifted ground.
The LED's use this lifted ground that must remain DC isolated from
the main ground. A mute switch would not be needed for this
setup. Use the hand held solar cell with a waist mounted wireless microphone.
3.
I need to
re-explore my Original
Solar Cell volume technique that used a FET from 08/2005.
This "is not" hand held, see photo above. It could only
output a microphone level input to an amplifier. Maybe I will
make small circuit board with a RS pre-amp chip and the connections necessary
to drive a guitar amp or headphones. It would use a 6 volt
battery pack enclosed in the volume box mounted on the remote
volume stand. You can also add in R-Tune 1b
above using a stereo jack at the theremin. 06.25.08
4.
The Ultermen
5 polyphonic theremin board can combine with 1b
R-Tune arrangement
above by using a 1/8" stereo jack at the
theremin board. You could mount the Ultermen 5 on the
remote volume stand
with the 5 LED's facing upward. The hand held
solar cell is used to capture each isolated octave modulated on
a light beam. A mute switch
would not be needed for this setup. Connect the solar cell into a
waist mounted wireless microphone to transmit to an amplifier.
5.
It is not out of the near future possibilities my making a
standard RF hoop or capacitive plate
style volume control mounted on a remotely positioned volume
stand.
Usually
your theremin can properly earth ground through your connection to the
amplifier.
Wall wart powered amplifiers don't ground properly!
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