NE555 2 CH Channel Dual Way Micro USB - Pulse Frequency Duty Cycle Adjustable Module - Square Wave Signal Generator DC 5-30V 5V 3 Button 1Hz ~ 150KHz

Parameter Settings:

Module has three buttons: [Set], [Up], [Down].
Press [Set] key to switch (FR1: PWM1 frequency; dU1: PWM1 duty cycle; FR2: frequency of PWM2; dU2: PWM2 duty cycle)
Press [Up], [Down] keys to modify (long press can add or subtract fast).

Frequency ranges:

• XXX (integer): min unit is 1Hz, the range 1Hz ~ 999Hz;

• XX.X (decimal point in ten): min unit is 0.1Khz; the range of 0.1KHz ~ 99.9KHz

• X.X.X. (3 decimal point): min unit is 1Khz; the range 1KHz ~ 150KHz

A frequency display example:

• "100" PWM output 100Hz;

• "54.1" PWM output 54.1KHz

• "1.2.4." PWM output 124KHz

• Duty Cycle in the range: 0 to 100

Application Scopes:

• As a square wave signal generator.

• Generate a square wave signal for stepping motor driver.

• Generate an adjustable pulse generation for chip use.

• Generate variable pulse signal for controlling related circuit (PWM dimming, speed).

Set the PWM frequency

• "S1FXXXT": setting PWM1 frequency of XXX HZ (001 ~ 999)

• "S1FXX.XT": set the frequency of PWM1 XX.X KHZ (00.1 ~ 99.9)

• "S1F: X.X.X.T": setting PWM1 frequency of XXX KHZ (0.0.1 ~ 1.5.0..)

• 'S1': PWM1

• 'S2': PWM2

• 'F': Frequency

• 'D': Duty Cycle

• 'T' is the end flag

Set the PWM duty cycle

• "S1DXXXT": setting PWM1 duty cycle XXX; (001 ~ 100)

• "S2DXXXT": set PWM2 duty cycle XXX; (001 ~ 100)

• Setting successful return: DOWN;

• Setting failback: FALL.