![]() Arduino Motor Shield REV3 A000079 4.6 (268) 2900 FREE delivery CNC Shield Expansion Board V3.0 + 4Pcs A4988 Stepper Motor Driver for Engraver 3D Printer DC 12V to 36V 4. The strange values are on 2B, 2A, 1A, 1B where I always get 12 V. 1-16 of 41 results for 'Arduino Stepper Motor Shield' RESULTS Price and other details may vary based on product size and color. 150+ ESP8266 NodeMCU Projects, Tutorials and Guides with Arduino IDE. I set the Vref to 0,23V by following the Pololu instruction, then I checked with a tester the voltage on the A4988 chip and it seems to work all correctly: ENABLE=about 5V, MS1 MS2 and MS3 = 0V, RESET and SLEEP are in continuity, STEP = 2,4V (maybe it's the average voltage between 0 and 5V LOW/HIGH), DIR changes every 4 seconds from 5V to 0, VMOT=12V, VDD= 5V. ![]() The problem is that I get no response from motor. 1 Although the default Arduino PWM frequency (980Hz) on pins 5 and 6 that control the PWM inputs to the shield will work, the operational envelop is limited and will likely disappoint. Hi everybody, I'm using an Arduino Mega with CNC V3 SHIELD and one A4988 Stepper Motor Driver Carrier ( Pololu - A4988 Stepper Motor Driver Carrier), to control this Nema 17 motor ( ). Here is some code I wrote for controlling a stepper motor using the Sparkfun Monster Moto shield.
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