About GMAC EXT

The GMAC Extension Board for bots is a versatile expansion board designed to enhance the capabilities of GMAC systems used in robotics applications. The board features two servo drivers, each capable of handling 16 channels with 12-bit PWM resolution, providing precise control for up to 32 servos.

For I2C connectivity, the board includes three 4-pin JST connectors, each configured with pins for 3.3V, GND, SDA (Serial Data), and SCL (Serial Clock). This allows for easy integration of I2C devices into the system. Additionally, the board supports I2S connectivity with two 6-pin JST connectors, matching the GMAC specification. These connectors include pins for GND, Vcc, 46-LRCK (Left-Right Clock), 45-BLCK (Bit Clock), 47-Din (Data In), Microphone IN, and 0 – D out for speakers, providing comprehensive support for audio input and output.

The board features an audio output for connecting speakers and includes a pre-mounted Max 98357A Class-D amplifier, known for its efficiency and compact size. This amplifier enhances the audio capabilities of the board, making it suitable for various applications requiring sound output.

For power supply, the board offers a 2-pin high power screw terminal for connecting an external battery, supporting a voltage range of 7V to 9V and a current capacity of up to 10A. Additionally, a Vout connector provides power output for the GMAC system, ensuring that all connected components receive adequate power.