Voltage controlled oscillator (VCO) LF442, TL082 op-amp based on the operating voltage of + -12 volts dc symmetrical sine, square wave with frequency adjustment on the sound effects can be created.
* Octave control voltage 1V
* 4 octave 1V control voltage inputs.
* 1 linear control voltage input.
* Fixed sync input.
* Rectangular waves can be set between 10% and 90%
* Frequency range 20kHz sub-audible ultra-sonic (about 0.1 hertz)
* +12 V supply 23mA current consumption.
VCO circuit sample sounds
What is VCO ?
voltage-controlled-oscillator or VCO is an electronic oscillator whose oscillation frequency is controlled by a voltage input. The applied input voltage determines the instantaneous oscillation frequency. Consequently, modulating signals applied to control input may cause frequency modulation (FM) or phase modulation (PM). A VCO may also be part of a phase-locked loop.
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Published: 2011/01/28 Tags: audio control circuits
Electronic Piano Circuit Attiny2313 Simple Audio Project
Atmel ATtiny2313 two 1.5V AA batteries powered electronic piano circuit connected in series (3V) can be operated. PB3 – PB4 16 on pins 15 and 32 ohm speaker connected to these pins as exit. 13 pieces in varying shades of sound produced by this tone. AVR programming beginners a good example for people.