Dual Bipolar Stepper Motor Shield for Arduino (A4988)

DescriptionGenerally, it’s not an easy thing to drive stepper motor(s) with Arduino; but with this stepper motor shield, you can easily control 2 stepper motors via just 4 digital I/O’s. This board is compatible with the Arduino UNO R3, and gets direct support with Xbee and Xbee form factor Wi-Fi, Bluetooth and RF modules. Easy connection of cables via screwless PC terminals. Each stepper motor has a code switch for adjusting driving modes, to obtain different rotational speeds. The interfaces of the board include extension 6 channel Analog I/O, 10 channel Digital I/O & I2C.The driver IC uses the most popular A4988, widely used in 3D printers and CNC machines.  The A4988 can control one bipolar stepper motor at 2 A output current per coil.  With one mega and DFRobot’s mega expansion shield, a 3D printer control board can be built so much easier.  Here are key features for A4988 stepper motor driversSimple step and direction control interfaceFive different step resolutions: full-step, half-step, quarter-step, eighth-step, and sixteenth-stepAdjustable current control lets you set the maximum current output with a potentiometer, which lets you use voltages above your stepper motor’s rated voltage to achieve higher step ratesIntelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay)Over-temperature thermal shutdown, under-voltage lockout, and crossover-current protectionShort-to-ground and shorted-load protectionPIN OUT & DIAGRAMFEATURESEasily control 2 stepper motors with only 4 digital I/Os.Fully compatible with Arduino UNO R3、Leonardo、Mega and supports XBee， XBee Wi-Fi， Bluetooth and RF modules.6 Analog / 10 Digital & I2CScrewless connection with press and connect. For detailed pin mapping please refer to product wiki.Each stepper motor has a switch for mode switch to obtain different rotational speeds. Step modes include 1, 1/2, 1/4, 1/16.Wireless switch next to Xbee. “PROG” mode for USB uploading and “RUN” mode for wireless communication.SPECIFICATIONSInput Voltage：8-35V DC (Just power the stepper motor driver)Press to connect cables, quick and easyDigital I/O:D4,D5,D6,D710 channel digital I/O&6 channel Analog I/O additionA4988 micro stepping bipolar stepper motor driverAdjustable current limitingUp to 2 A output current per coilFive different micro-step resolutions (down to 1/16-step)DOCUMENTSProduct WikiSchematicA4988 DatasheetSHIPPING LIST1 x Stepper Motor Shield For Arduino2 x A4988 Motor Drivers