Robotic E-field Visioning Based on Leon Theremin's Design of the "Theremin"
Sensors:
The
sensors are based off the common
CD4093 CMOS Schmitt triggered QUAD NAND gate.
This IC preforms four
functions. The first gate is used as the main sensing oscillator.
Combined with the antenna, a 20pF capacitor, and variable resistor,
it forms the main oscillator whose frequency varies ever so slightly
when other objects come near the antenna. The second gate forms the
reference oscillator with a fixed capacitor and a fixed resistor well
shielded from the outside world. The third gate takes the two
frequency signals from the main and reference oscillators and mixes
them into a heterodyne signal. The forth gate acts as an
enable to disable the sensor.
Parts
list
QTY
Description
Digikey#
1
PCboard (photo etch) PC17P-ND
1
CD4093
NAND
CD4093BCM-ND
1
10nF 50V
Capacitor
PCC103BCT-ND
1
10uF 10V TAN Cap.
PCS2106CT-ND
2
20pF 50V NPO Cap.
PCC200CCT-ND
1
20K 1/4"
Pot.
3266W-203-ND
1
4.7K SMD
Resistor
P4.7KECT-ND
Note: The "original" content of this site's ideas, text, pictures, schematics, layouts, software, theory, etc. are freely and completely released to the Public Domain and have no patent, copyright, or trademark.
Specifically - The "Thermin Vision" described here is a public design project that actively solicits ideas from anyone who wishes to help in the design. All details of the design have published in a number of public forums or can be obtained just by asking.
This project was funded by the research and development department of Team-Titanium and managed by Team-Titanium Combat Platform Management. Technical resources were provided under project "We are a Cyborg!".
Inquiries may be directed to:
platform.management@team-titanium.com