Tool/software:
Hi Experts,
We need a monostable pulse of 85 sec using the IC NE555D.
Please suggest best possible RC combinations for 85 sec pulse in mono-stable.
R&C are 0805 package and capacitor with 25V grade.
With regards,
Balaram
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Tool/software:
Hi Experts,
We need a monostable pulse of 85 sec using the IC NE555D.
Please suggest best possible RC combinations for 85 sec pulse in mono-stable.
R&C are 0805 package and capacitor with 25V grade.
With regards,
Balaram
Hello Balaram,
Easy to find 0805 values below. From cap alone expect +/-10% variance before considering any other factors.
Time = R * C * ln(3)
C (uF) | R (Mohm) | Time |
6.8 | 11.30 | 84.4 |
10 | 7.68 | 84.4 |
15 | 5.11 | 84.2 |
22 | 3.48 | 84.1 |
What is your supply voltage and acceptable timing tolerance?
General advice in this FAQ: https://e2e.ti.com/support/clock-timing-group/clock-and-timing/f/clock-timing-forum/857914/faq-how-do-i-design-monostable-timer-circuits-using-lmc555-tlc555-lm555-na555-ne555-sa555-or-se555