Let's select a common ceramic capacitor: $C = 100\textnF$ ($0.1\mu\textF$).
+---[ R ]---+ | | Input ----+---|\ | | >O----+---- Output +---|/ | [ C ] | GND Assume the capacitor is discharged ( ). The input is Low, so the inverter output goes High. 74hc14 oscillator calculator
To build a variable frequency oscillator, replace the fixed resistor ( ) with a fixed resistor (e.g., for safety) wired in series with a potentiometer (e.g., ). This protects the circuit from a Let's select a common ceramic capacitor: $C =
For frequencies above ~1 MHz, the gate delay (≈10–20 ns) becomes significant, making the formula inaccurate. Few calculators warn about this. To build a variable frequency oscillator, replace the
frequency = 1 / (R * C)
) you have on hand. I can calculate the exact values or suggest adjustments for your project. Share public link