Theremin Circuit Theory. The wien bridge theremin a theremin without inductors theremin this circuit uses a common cmos 4069 ic. The mc14069 is pin for pin compatible.
Designed by tony van roon va3avr. The instrument s controlling section usually consists of two metal antennas that sense the relative position of the thereminist s hands and control oscillators for frequency with one hand and amplitude with the other. A pitch circuit and a volume circuit.
The fixed oscillator generated waves at a static frequency.
The electric signals from the theremin are amplified and sent to a loudspeaker. The mc14069 is pin for pin compatible. This is achieved by using two antennas one controls the pitch and the other the volume which are capacitively coupled to the player s hands. Designed by tony van roon va3avr.
