555 Timer Calculator
This calculator helps you determine the timing intervals of a 555 Timer IC in astable mode, used widely in electronics projects. Enter the resistor and capacitor values to calculate the frequency and duty cycle.
Calculator
Results
Frequency (Hz):
0
Duty Cycle (%):
0
Source of Data and Methodology
All calculations are based on the standard formulas for 555 Timer circuits. For more details, see the 555 Timer datasheet by Texas Instruments. All calculations are based on this authoritative source.
The Formula Explained
Frequency (f): f = \frac{1.44}{(R1 + 2 \times R2) \times C}
Duty Cycle (D): D = \frac{R1 + R2}{R1 + 2 \times R2} \times 100\%
Glossary of Variables
- R1, R2: Resistor values in Ohms.
- C: Capacitance in Farads.
- Frequency (Hz): Number of cycles per second.
- Duty Cycle (%): Percentage of one cycle in which a signal is active.
How It Works: A Step-by-Step Example
For a 555 Timer with R1 = 1kΩ, R2 = 10kΩ, and C = 10μF, calculate the frequency and duty cycle using the formulas provided.
Frequently Asked Questions (FAQ)
- What is a 555 Timer? The 555 Timer is an integrated circuit used in various timer, delay, pulse generation, and oscillator applications.
- How do you calculate the frequency of a 555 Timer? Use the formula:
f = \frac{1.44}{(R1 + 2 \times R2) \times C}. - What is the duty cycle? The duty cycle is the percentage of one period in which a signal is active.
- Can I use different resistor values? Yes, using different resistor values will change the timing intervals.
- Why is my circuit not working? Double-check connections and ensure all components are functional.