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THE THEREMIN
Marco A. Rodriguez
Department of Physics & Astronomy, College of Charleston, Charleston, SC
OPERATION: HETERODYNING
• High to Low frequency conversion
• Non-linear signal processing device
• Heterodynes
• Filtering to audible frequency range
OPERATION: THE FIXED OSCILLATOR
• Initially tuned at high frequency
• Change in capacitance = change in voltage
• Voltage-controlled amplifier
OPTICAL THEREMIN
• Varying resistance vs. capacitance
• No need for RF oscillators
• No need for heterodyning
CHALLENGES
• IC sensitivity
• Soldering work
(12 hours of my life I will never get back)
• Resistor/Capacitor Tuning