Functional Features

Principle Overview

This H-bridge module uses gate circuits and MOS transistor combinations to achieve motor forward and reverse rotation, braking, and speed controlIt has both a large output current and a flexible control signal logic similar to L298.

Technical Parameter

interface definition

Control signal logic

1. Motor interface 1 control signal logic

Note: When the input signal is suspended, it is at a high level

2. Motor interface 2 Control signal logic

Note: When the input signal is suspended, it is at a high level

Typical Connection Example

1. Wiring method for controlling motor rotation using a microcontroller

The power supply of the microcontroller and the control signal power supply of the driver board should be grounded together, but not with the motor power supply GND. When using a 5V microcontroller, connect the driver board+5V to the power supply+5V; When using a 3.3V microcontroller, the driver board+5V is connected to a 3.3V power supply. The control signals of the microcontroller and the driver board can share the same power supply or be independently powered (but must be grounded). ENA is connected to a GPIO or PWM output port of the microcontroller. When ENA is at a high level, the drive board is enabled, and forward and reverse rotation or braking are effective. If it is a PWM signal, the motor can be adjusted in speed; When the power is low, the drive board is disabled and the motor interface has no output. IN1 and IN2 are connected to two GPIO ports of the microcontroller (supporting any IO port of the 51 microcontroller without the need for pull-up resistors), controlling the forward and reverse rotation of the motor and braking. The driver logic is shown in the logic table.

2. Method of using buttons to control the forward and reverse adapter wires of the motor

Among them, PB1 and PB2 are two buttons. When PB2 is pressed and PB1 is not pressed, IN1 is at a high level, IN2 is at a low level, and the motor rotates forward; When PB2 is pressed and PB1 is not pressed, IN1 is at a low level, IN2 is at a high level, and the motor reverses; When PB1 and PB2 are both pressed or both bounce up, IN2 and IN2 are both at low or high levels, and the motor brakes (or brakes). The control signal logic is shown in the logic table.

Dimension definition

The size is 5.5cm × 5.5cm × 2.0cm. The installation hole diameter is 3mm, and it is recommended to use M3 screws for fixing. Be careful not to short-circuit the back circuit during installation. You can add insulation pads or use copper pillars to lift the circuit board.

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