DFRobot
Raspberry Pi Motor Driving Expansion Board (Compatible with Raspberry Pi 4B / 3B+ / 3B / Zero)
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##Introduction The multifunctional motor driver expansion board is designed for Raspberry Pi Zero/Zero W/A+/B+/2B/3B/3B+/4B. This fully-featured robot motor ...
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Plain-language definitions for the technical terms used above.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- motor driver
- An electronic circuit that lets a low-power controller switch and control a motor that needs more current than the controller pins can safely provide. Checking motor driver support matters because pumps and motors usually cannot be connected directly to a microcontroller output.
- open-drain
- A digital output style that can pull a signal line low but cannot drive it high by itself, so it needs a pull-up resistor or another circuit to make the high level. Open-drain outputs are often used for shared alert lines or buses because multiple devices can safely pull the same line low.
- PWM
- Pulse Width Modulation is a way for a digital pin to simulate variable output power by switching on and off very quickly. It matters for controlling things like LED brightness, motor speed, or servo-style signals from a microcontroller pin.
- servo
- A servo is a motor with built-in position control, usually told to move to a specific angle by a control signal. It matters when you need repeatable movement, such as steering, arms, flaps, or linkages, rather than continuous spinning.
- UART
- UART is a simple asynchronous serial interface that sends data over separate transmit and receive wires, usually labelled TX and RX, with both ends set to the same baud rate. It is a common way for microcontrollers and other serial devices to exchange data.
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Supplier page — dfrobot.com
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DRI0054 raspberry pi motor driver board schematics V1.1
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