Mini PWM generator with display

Description

Featuring a backlit LCD display, this compact module generates a square-wave PWM signal from 1 Hz to 150 kHz with an adjustable duty cycle from 0 to 100%. All parameters, set via 4 buttons or TTL-level serial communication, are automatically saved in non-volatile memory. Particularly suitable as a square-wave signal generator for controlling a motor driver, microcontrollers, dimmers, etc. Power supply: 3.3 to 30 VDC.

Technical Specifications

• Settings: via four independent buttons for frequency and duty cycle. A short press increases or decreases by 1, a long press increases or decreases rapidly.

Communication Standard (Hyperterminal or similar)

9600 bps Data bits: 8

1. Setting the PWM frequency
“F101”: sets frequency to 101 Hz (001 to 999)
“F1.05”: sets frequency to 1.05 kHz (1.00 ~ 9.99)
“F10.5”: sets frequency to 10.5 kHz (10.0 ~ 99.9)
“F1.0.5”: sets frequency to 105 kHz (1.0.0 ~ 1.5.0)

2. Setting the PWM duty cycle
“DXXX”: sets PWM duty cycle to XXX; (001 ~ 100)
For example, D050 sets the PWM duty cycle to 50%

3. Reading the set parameters
Send “read” to read the set parameters.