Service Hours: Monday to Friday,Saturday: Guangfu Road branch only, Closed on Sundays and public holidays. For specific hours, please see details for each branch.

All marked prices are tax-inclusive and in TWD. Free shipping for purchases over 1200 (mainland Taiwan).

Language: English Centenary Materials Co., Ltd.

Centenary Materials Co., Ltd.

繁體中文 English

Service Hours: Monday to Friday,Saturday: Guangfu Road branch only, Closed on Sundays and public holidays. For specific hours, please see details for each branch.

All marked prices are tax-inclusive and in TWD. Free shipping for purchases over 1200 (mainland Taiwan).

Service Hours: Monday to Friday,Saturday: Guangfu Road branch only, Closed on Sundays and public holidays. For specific hours, please see details for each branch.

All marked prices are tax-inclusive and in TWD. Free shipping for purchases over 1200 (mainland Taiwan).

Language:

繁體中文 English

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You are here: Conversion Calculator > 555 Timer Calculator

555 Timer Calculator

Calculate frequency, duty cycle and component values for 555 timer circuits

Astable (Square Wave) Monostable (One-Shot)

R1

kΩ

R2

kΩ

C

µF

Result

Formula

Astable (Square Wave)

f = 1.44 / ((R1 + 2×R2) × C)

Duty Cycle = (R1 + R2) / (R1 + 2×R2)

Monostable (One-Shot)

T = 1.1 × R1 × C