L293D Arduino motor control shield - stepper motor control driver

The stepper motor driver module provides the ability to connect up to 4 motors to the Arduino platform at the same time. 2 stepper motors or 4 collector motors can be connected to the module board. In addition, it is possible to connect 2 servos controlled by Arduino hardware timers. This module can be used to build radio controlled toys, watering systems or other projects.

The expansion board is designed based on 2 chips: L293D and 74HC595. The L293D is a 4 channel driver that drives DC motors up to 600 mA per channel. The control is carried out via TTL logic (transistor-transistor logic). 2 L293D chips in a DIP package are connected to the board. In the middle is the 74HC595 chip. The 74HC595 is an eight-bit shift register designed to reduce the number of microcontroller device ports used. The microcircuit can be in 3 states: high and low levels or high impedance (high resistance). All microcircuits are in panels for quick replacement in case of malfunction.

The expansion board is connected to the Arduino by hinged mounting. The module occupies all digital pins except pins 0, 1, 2 and 13 and analog outputs A0 - A6. The EXT_PWR terminals are used to connect power to the board, and the M1, M2, M3 and M4 terminals are used to connect the motors to the module. Also in the corner of the board are pins for connecting servos, which are marked SER1 and SERVO_2. There is a jumper on the board that is responsible for powering the module. When voltage is applied to the motor control board, the jumper must be removed.

There is an LED on the board that lights up when all 4 powered motors are connected. The module has holes for easy mounting on the device.

For further work with the module in the Arduino IDE development environment, you need to download the AFMotor library, and then manually install it.

Module Specifications:

Supply voltage, V 6 ... 24
Chips L293D, 74HC595
Number of power channels 4
Maximum passing current, mA 600
Module dimensions, mm 69.3 x 53.1 x 20.0.