question:
i have constructed a simple logic oscillator from 3 NOT logic gates and a resistor and capacitor.
see attached .png file
i am using a 1.0 microfarad cap and a 1k potentiometer as the resistance
i want a 1.0kHz freq, so i have set the pot to @ 330ohms
when i use the pot, the circuit produces a beautiful square wave...
the problem:
if i remove the pot and replace it with a 330ohm resistor, the circuit no longer oscillates.
i have tried many different resistors and no oscillation, however, the moment i hook it back up with the pot set at 330, it works again.
strange...what am i missing
i have constructed a simple logic oscillator from 3 NOT logic gates and a resistor and capacitor.
see attached .png file
i am using a 1.0 microfarad cap and a 1k potentiometer as the resistance
i want a 1.0kHz freq, so i have set the pot to @ 330ohms
when i use the pot, the circuit produces a beautiful square wave...
the problem:
if i remove the pot and replace it with a 330ohm resistor, the circuit no longer oscillates.
i have tried many different resistors and no oscillation, however, the moment i hook it back up with the pot set at 330, it works again.
strange...what am i missing
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