# PWM signal generator module, 3.3-30V, 1-150KHz, serial, adjustable frequency and duty cycle

- Page: https://sigmanortec.ro/en/pwm-signal-generator-module-33-30v-1-150khz-serial-adjustable-frequency-and-duty-cycle
- Price: 17.64 RON
- Availability: In stock; 1-2 zile
- Reference: 9473 · EAN: 5945768926535
- Category: Mechatronics and IoT > PWM and Frequency generators
- Specifications: Supply Voltage: 3.3; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.
- Package (shipping data): 0.014 kg
- Updated: 2026-05-21
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 01:33 (Europe/Bucharest)

## Description

Compact PWM generator for fine tuning frequency and duty cycle, ideal for motor control, LED lighting, testing and automation. It operates at 3.3-30V and covers 1Hz-150KHz, allows quick adjustment from buttons and TTL RX/TX serial control, and the internal memory saves the last setting when the power is turned off.
PWM (Pulse Width Modulation) signal generator module, with the possibility to set the frequency and the duty cycle and the possibility of control through the serial interface.
The module keeps in memory the last setting when the power supply is interrupted.
It has 4 buttons that adjust the frequency and Duty Cycle, the short press is used to change the values and the long press of the buttons for the quick change of the values.
The frequency is divided into 4 resolutions with automatic switching:
- XXX, without decimal points, the smallest unit is 1Hz, values between 1Hz and 999Hz
- X.XX, decimal point in hundredths, the smallest unit is 0.01KHz, values between 1.00KHz and 9.99KHz
- XX.X decimal point in tenths, the smallest unit is 0.1KHz, values between 10.0KHz and 99.9KHz
- XXX, decimal point in tenths and hundredths, the smallest unit is 1KHz, values between 1KHz and 150KHz
Display example:
- 100 indicates PWM 100Hz
- 1.01 indicates PWM 1.01KHz
- 50.1 indicates PWM 50.1KHz
- 1.2.3 indicates PWM 123KHz
Specifications:
Supply voltage: 3.3 - 30VDC
Frequency range: 1Hz - 150KHz
Frequency accuracy: 2%
Output type: PWM
Waveform: Square
Serial control: Yes, TTL, through the RX and TX pins
Output load capacity: 5 - 30mA
Output amplitude: PWM amplitude equal to the supply voltage
Operating temperature: -20 - 70 degrees C
Dimensions mm: 52 x 32mm
Serial communication:
Baud rate: 9600
Data bits: 8
- PWM frequency setting:
"FXXX", "FX.XX", "FXX.X", "FX.XX", where X is replaced by the desired values
- Setting PWM Duty Cycle:
"DXXX", where X is replaced with values between 0 and 9 (example: "D050" sets Duty Cycle to 50%)
- Reading parameters:
Use the "read" syntax to read the set parameters.
The successful setting returns "DOWN", the failed one "FALL".