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Circuits designed by David Johnson, P.E.
Last Updated on: Friday, November 17, 2017 06:32 AM

List of Dave's Circuit Designs

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More  Astable Oscillators Circuits    Audio Oscillators   
Square Wave Oscillators  
Voltage Controlled Oscillators (VCO)

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.

Click on Drawing Below to view PDF version of Schematic

Circuit 4548 Voltage Control Oscillator designed by Dave Johnson, P.E. (March 12, 2002)

More  Astable Oscillators Circuits   
Audio Oscillators   
Square Wave Oscillators  
Voltage Controlled Oscillators (VCO)

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