Serial (ASI-V2) DC / Stepper motor controller

This is a 4 channel motor controller designed to control either DC motors or stepper motors. Up to 4 DC motors can be controlled in a single direction or two motors bi-directional. Also there is a pulse width modulation facility allowing speed control.

The device will also control either Uni-polar or bi-polar stepper motors, step continuously, full step half step or choose the number of steps. All of this control is carried out using single text commands on a serial interface

The BV4113 utilises the  L293D chip that has internal diode protection and is capable of supplying up to 600mA with 1.2A peak. The chip can be powered separately with up to 36V from the PWR pins. In addition to controlling motors there are 2 general purpose input / output lines and a 10 bit analogue input.

Documentation - This is a website that contains all of the documentation available for this device including where applicable Arduino and BASIC software examples and libraries.

Features

• Easy to use asynchronous serial interface requiring only 4 connections.
• Command set based on text
• Only 2 data lines required, transmit and receive. The device will work with transmit only.
• Many devices can use the same two data lines
• Each device has it’s own user configurable address
• No specialist hardware, can work from a PC Com port
• Automatic Baud rate detection up to 38.4K from a selected set.
• Simple software requirement for interfacing with a microcontroller.
• Common protocol used throughout range, devices can be mixed on same data bus
• Works with RS232 standard voltages and +5V, no level translator needed for receiving data
• Drive current 600mA, up to 36V (total power 4W)
• Up to 4 DC motors or one stepper motor either bi-polar or uni-polar
• PWM control for each DC motor when used in differential mode (forward and reverse)
• Differential mode, forward and reverse
• Half step or full step patterns, user definable full step pattern
• Continuous stepping or pre-defined number of steps
• Step read capability to indicate number of steps to go.
• Step speed controllable from 128us delay between steps to 32ms in 256 increments.
• Ramp up available for slow start.
• Two general purpose digital input / output lines
• One 10 bit analogue input channel
• Low power saver mode.

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