H-Bridge Driver Board for DC Motor

The Tuya Sandwich H-bridge driver board is a typical DC motor control board. You can use the board with other control boards to reverse the voltage polarity for the connected load or output ports.

Background information

H-bridge is a typical DC motor control circuit. It is named after H-bridge because its circuit shape looks like the letter H. The four vertical line segments in the letter H consist of four triodes and the motor is in the center of the horizontal line segment.

The Tuya Sandwich H-bridge driver board is equipped with a DC005A round power input and a built-in DC circuit. It provides 5V/1A and 3.3V/1A power to other components.

Key components

I/O ports and function definitions

• CN5: DC005A terminal, which is the DC 12V power input port of the board.
• CN10: Load interface, which is used to connect the DC motor and more.
• CN11: Voltage output interface. When CN4 is short connected, it outputs DC 12V voltage. When CN9 is short connected, it outputs DC 5V voltage.

Schematic diagram and PCB

Note: PWM1 and PWM2 are initialized as logical low, and cannot be set as logical high at the same time.

Things to note

• The actual voltage of interfaces showed in the 12V silk screen is identical to the external power input.
• The logic levels of PWM1 and PWM2 cannot be set as high at the same time.