Blinking LED Using 555 Timer

Astable Mode 555 Timer Calculation in DCAClab: 1. Frequency of Oscillation (f): The formula for frequency is: f = 1.44 / (R1 + 2R2) * C1 Substitute the…

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How it works

Astable Mode 555 Timer Calculation in DCAClab:

1. Frequency of Oscillation (f):

The formula for frequency is:

f = 1.44 / (R1 + 2R2) * C1

Substitute the given values:

f = 1.44 / (20,000 + 2 * 20,000) * 0.01 * 10^(-6)

Simplifying:

f = 1.44 / (60,000 * 0.01 * 10^(-6))

f = 1.44 / 0.0006

f = 2400 Hz

So, the frequency is 2400 Hz (or 2.4 kHz).

2. High Time (T_high):

What's inside

1× Battery
3× Resistor (10 kΩ, 20 kΩ)
2× Capacitor
1× LED
1× Integrated circuit

About

By Md. Anisur Rahman
Saved February 07, 2025 · updated January 15, 2026
1,829 views
Page: dcaclab.com/circuits/80103-blinking-led-using-555-timer

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Cite: Rahman, M. (2025). Blinking LED Using 555 Timer. DCACLab. https://dcaclab.com/circuits/80103-blinking-led-using-555-timer