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Oscillators:  Audio
Oscillator Circuits -- Main Page
Last Updated on: Tuesday, April 01, 2014 04:29 AM


Circuits Designed by Dave Johnson, P.E. :
  • CMOS SCHMITT TRIGGER IC MAKES VCO
    By changing the supply voltage fed to a classic 4584 Schmitt trigger type oscillator, the oscillator frequency can be changed over a range of 50:1.  A 74HCU04 inverter is used at the output of the 4584 to maintain a constant TTL logic level signal.


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

Cheap 40kHz Clock -  ASCII format.  This circuit has worked for me in many applications. (it might be an idea to buffer the signal befor using it. (There are still 5 unused gates in the 'C14) (electronic circuit added 7/03)
CMOS Schmitt Trigger IC Makes VCO -  By changing the supply voltage fed to a classic 4584 Schmitt trigger type oscillator, the oscillator frequency can be changed over a range of 50:1.  A 74HCU04 inverter is used at the output of the 4584 to maintain a constant TTL logic level signal.... [Designed by David A. Johnson]
Miniature Audio Oscillator -  The Miniosc, low distortion battery powered audio oscillator ....
Minimal audio oscillators -  In order to generate a single note you may try these simple circuits. With only three components you may implement some basic buzzers. You need a telephone earpiece for the first circuit.....(added 9/07)
Simple Audio Oscillator -  For use with the millivoltmeter, for testing amps and speakers  ....

Variable Frequency Audio Oscillator  -  Variable Frequency Audio Oscillator circuit....
 



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