Robotic E-field Visioning Based on Leon Theremin's Design of the "Theremin"
Processor:
The
processor is controlled by a microcontroller. I use the Basic Stamp
BS2p24 but practically any microcontroller would work. The
microcontroller turns on and reads the information from each sensor.
It also does some math to provide a nice output. There is some
circuitry which provides power to the sensors and makes the
connections. However, it also has a "low pass" filter which
filters out the high frequency from the heterodyne signal and pulse
shapes it leaving only the low frequency difference pulse signal we
want. There is also a binary counter that divides the signal by
64/256/1024 counts to average and smooth it for greater stability.
The basic stamp then measures the time of this pulse to which is
proportional to the capacitance of the antenna and thus provides the
crucial data we want.
Basic Stamp BS2p24
Schematic
LT1801 Data Sheet
CD74HCT4040 Data Sheet
MicroSim V9.1 Model
Parts
list
QTY
Description
Digikey#
1
PCboard (photo etch) PC17P-ND
1
10nF 50V
Capacitor
PCC103BCT-ND
3
1nF 50V
Capacitor
PCC102BCT-ND
1
10uF 10V TAN Cap.
PCS2106CT-ND
1
47K SMD Resistor
P47KECT-ND
1
10K SMD Resistor
P10KECT-ND
3
4.7K SMD
Resistor
P4.7KECT-ND
4
1N4148
Diodes
DL4148MSCT-ND
1 LT1801 Dual
Op-Amp LT1801CS8-ND
1 74HCT4040
Counter 296-14558-1-ND
1 Header
0.1"
929400-01-36-ND
1
24 pin IC
Socket
A9424-ND
1
BASIC
Stamp
BS2P24-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