Module PWM generator 2-channel

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The Dual Channel PWM Signal Generator with LED display is able to generate a square wave signal that can adjust the brightness or adjust the speed of the motor (through the motor driver), it can be controlled via UART TTL (TXD and RXD GND pins).

Key Features:

• Operating voltage: 5-30V, support power supply from micro USB 5V
• Frequency Range: 1Hz ~ 150KHz
• Frequency Accuracy: ±2%
• Output current: <30mA
• Output amplitude: same as input voltage, or can be independently changed from 5V to 30V with external power input
• Operating temperature range: -30~+70°

Setup and installation

1. By briefly pressing the SET key, 4 parameter values ​​can be shifted (FR1: PWM1 frequency; dU1: PWM1 duty cycle; FR2 : PWM2 frequency dU2: PWM2 duty cycle); before switching, the corresponding parameter name
2. will flash
3. Press the UP (UP), DOWN (DOWN) button to change the current parameter value.
4. Each channel has 3 types of frequency range presetting, long press SET button is used to switch, the duty cycle of 3 frequencies is the same (XXX: 1Hz ~ 999Hz; XX.X: 0.1Khz ~ 99.9Khz; X.X.X.: 1kHz ~ 150kHz,)

UART Options:

• 9600 bps Data bits: 8
• Stop bit: 1
• Check digit: none
• Flow control: none

Frequency setting:

• "S1FXXXT":set PWM1 frequency as XXX HZ (001~999)
• "S1FXX.XT":set PWM1 frequency as XX.X KHZ (00.1~99.9)
• "S1F:X.X.X.T":set PWM1 frequency as XXX KHZ (0.0.1.~1.5.0.)
• "S1":PWM1
• "S2":PWM2
• "F":frequency
• "D":duty cycle
• "T":stop sign bit

Setting the duty cycle:

• "S1DXXXT":set PWM1 duty cycle as XXX；(001~100)
• "S2DXXXT":set PWM2 duty cycle as XXX；(001~100)
• Setting successfully back:DOWN
• Setting unsuccessfully back:FALL