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You are bidding for (four pieces) A4988 stepper driver in stylish black&white color all headers are soldered, the driver 100% TESTED one by one and well packed !
Please check on the picture below, especially the soldering quality !
The set comes with heat sink comes with conductive sticker exactly as pictured!
NOTE: Stickers are on the bottom of the box, please check the picture
tested and ready to use no soldering required
Those are 100% compatible drivers with Pololu schematic diagram and genuine A4988 IC on it, those are not inferior A4984 drivers !!!
The A4988 is a complete microstepping motor driver with built-in
translator for easy operation. It is designed to operate bipolar stepper
motors in full-, half-, quarter-, eighth-, and sixteenth-step modes,
with an output drive capacity of up to 35 V and ±2 A. The A4988 includes
a fixed off-time current regulator which has the ability to operate in
slow or mixed decay modes.
The translator is the key to the easy implementation of the A4988.
Simply inputting one pulse on the STEP input drives the motor one
microstep. There are no phase sequence tables, high frequency control
lines, or complex interfaces to program. The A4988 interface is an ideal
fit for applications where a complex microprocessor is unavailable or
During stepping operation, the chopping control in the A4988
automatically selects the current decay mode, Slow or Mixed. In Mixed
decay mode, the device is set initially to a fast decay for a proportion
of the fixed off-time, then to a slow decay for the remainder of the
off-time. Mixed decay current control results in reduced audible motor
noise, increased step accuracy, and reduced power dissipation.
Internal synchronous rectification control circuitry is provided to
improve power dissipation during PWM operation. Internal circuit
protection includes: thermal shutdown with hysteresis, undervoltage
lockout (UVLO), and crossover-current protection. Special power-on
sequencing is not required.
Low RDS(ON) outputs
Automatic current decay mode detection/selection
Mixed and Slow current decay modes
Synchronous rectification for low power dissipation
3.3 and 5 V compatible logic supply
Thermal shutdown circuitry
Shorted load protection
Five selectable step modes: full, 1/2, 1/4, 1/8, and 1/16
Content of package: - 4 x A4988 stepper driver - 4 x Heat sink - 4 x Conductive sticker (you can find the sticker on the bottom of the box, please check picture above)
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