NE555 Pulse Frequency Duty Cycle Adjustable Module

The NE555 Square Wave Signal Generator is a 5V square wave signal
generator with adjustable pulse frequency and duty cycle. It produces a
square wave signal that is used in research and development projects.
Use to generate a square wave drive signal by driving a stepper motor.
It is possible to fine-tune the output duty cycle. The duty cycle and
frequency cannot be adjusted separately; changing the duty cycle will
change the frequency.

Frequency Select Jumper Ranges

The Duty Cycle adjustment potentiometer is located near the LED and
allows you to change the output’s duty cycle. The duty cycle describes
how long the output is driven high compared to how long it is driven
low. Turning the pot counterclockwise decreases the length of time the
output is low while increasing the amount of time it is high (increases
duty cycle).

Especially at low frequencies, the duty cycle is
best stable around 50% or higher (high period is 50% or longer). The
output will go to a continuous low if the duty cycle is set too low.

Specifications

No Guarantee No Warranty