555 Astable Calculator
555 Astable Calculator
Use this calculator to find out the time period, capacitor, or resistor values needed to make a 555 astable oscillator.
Be careful when calculating for the passives, as some combinations are physically impossible (you will get negative resistances)!
| Solve For: | ||
| C1 | ||
| R1 | ||
| R2 | ||
| Result | Ready! | |
| Frequency | N/A | |
| Duty Cycle | N/A | |
| On Time | N/A | |
| Off Time | N/A | |
T = 0.693 \times C_1 \times (R_1 + 2 R_2)