



Bipolar stepper motor controller - A4988, supplied with voltage from 8 to 35 V.
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Controller enabling control of stepper motor thanks to module generating logical states like Arduino, STM32, Raspberry.
To supply the logical part of the module, a voltage range from 3V to 5.5V is required, which must be led to the VDD pin. Motor supply voltages from 8V to 35V are fed to the VMOT pin.
Connecting and disconnecting the motor while the controller is on can damage the controller. |
Step size is selected using MS1, MS2, MS3 inputs. The possible settings are shown in the table below. Inputs MS1, MS2 and MS3 have an internal pull-down resistor (100kOm).
MS1 | MS2 | MS3 | Resolution |
low | low | low | Full step |
high | low | low | 1/2 step |
low | high | low | 1/4 step |
high | high | low | 1/8th step |
high | high | high | step 1/16 |
One pulse given on the STEP pin causes one motor step in the direction selected by giving the appropriate logical state on the DIR pin. The STEP and DIR outputs are not pulled up internally. If the motor is to turn in only one direction, the DIR pin can be permanently connected to VCC or GND. The system has three more inputs to control power consumption: RST SLP and EN are described in the documentation. Please note that the RSTpin is not pulled up to anything. If not in use, it can be connected to an adjacentSLP pin.
A module with A4988 controller is also available.
Working at 5 different step resolutions:
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