CNC Shield Board Stepper Driver A4988 Module + Heat Sink

Description

• Low RDS (On) Output
• Automatic current decay mode  detection / selection
• Mix with slow current decay modes
• Synchronous rectification for low power dissipation
• Internal UVLO
• Crossover-current protection
• 3.3 and 5V compatible logic supply
• Thermal shutdown circuitry
• Ground fault protection
• Load short-circuit protection
• Five selectable step modes:  Full,  1/2, 1/4, 1/8 and 1/16

Warning: Connecting or disconnecting a stepper motor while the driver is powered can destroy the driver (More generally, rewiring anything while it is powered is asking for trouble)