Utilize this internet-based calculator to ascertain the time-out value (delay) of the IC 555 timer when used in an astable mode circuit. You can accurately compute the timing parameters that match your circuit setup by inputting the provided resistance and capacitance values. This tool empowers you to calculate the exact timing characteristics for your specific configuration.
IC 555 Astable Timer formula
![\[T1 = 0.7(R1+R2)*C\]](https://x-calculator.com/wp-content/ql-cache/quicklatex.com-4fef2abcb737c618ec22f9f9184c77c4_l3.png "Rendered by QuickLaTeX.com")
![\[T2 = 0.7*R1*C\]](https://x-calculator.com/wp-content/ql-cache/quicklatex.com-2356cd4445ff678a949a5a2368cc96ad_l3.png "Rendered by QuickLaTeX.com")
![\[T = 0.7(R1+R2)*C\]](https://x-calculator.com/wp-content/ql-cache/quicklatex.com-4bc6d36b73bd02157e1584af9c0c3877_l3.png "Rendered by QuickLaTeX.com")
![\[F = 1.45 / ((R1+2R2)*C)\]](https://x-calculator.com/wp-content/ql-cache/quicklatex.com-b8321e3375db4e5109a925c430941fcb_l3.png "Rendered by QuickLaTeX.com")
![\[D =0.1-((0.1*R2) / (R1+(2R2)));\]](https://x-calculator.com/wp-content/ql-cache/quicklatex.com-45fde537b4f87922e95187cd58b65e86_l3.png "Rendered by QuickLaTeX.com")
where:
- T1 = High Period,
- T2 = Low Period,
- T = Total Period,
- F = Frequency,
- D = Duty
