The Duet 3 Expansion Board 3HC V1.02 is a full-featured expansion board for the Duet 3 motherboards. The board contains a powerful 32-bit Atmel ARM Cortex-M4F microcontroller with a speed of up to 120 MHz. The part is also equipped with 3x 5A PWM outputs for extruders, 6 PWM outputs for fans, 6 I/O connectors with 3.3V output signal level and 30V outputs.