Manual

1. Overview

The qik 2s9v1 is Pololu’s second-generation dual serial motor controller. The compact board allows any

microcontroller or computer with a serial port (external RS-232 level converter required) or USB-to-serial

adapter [http://www.pololu.com/catalog/product/391] to drive two small, brushed DC motors with full direction and

speed control. The improvements over the previous generation and competing products include:

• high-frequency PWM to eliminate switching-induced motor shaft hum or whine

• a robust, high-speed communication protocol with user-configurable error condition response

• visible LEDs and a demo mode to help troubleshoot problematic installations

• reverse power protection on the motor supply (not on the logic supply)

Main Features of the Qik 2s9v1

• Simple bidirectional control of two DC brush motors.

• 4.5 V to 13.5 V motor supply range.

• 1 A maximum continuous current per motor (3 A peak).

• 2.7 V to 5.5 V logic supply range.

• Logic-level, non-inverted, two-way serial control for easy connection to microcontrollers or robot

controllers.

• Optional automatic baud rate detection from 1200 bps to 38.4 kbps;

• Two on-board indicator LEDs (status/heartbeat and serial error indicator) for debugging and feedback.

• Error output to make it easier for the main controller to recover from a serial error condition.

• Jumper-enabled demo mode allowing initial testing without any programming.

• Optional CRC error detection eliminates serial errors caused by noise or software faults.

• Optional motor shutdown on serial error or timeout for additional safety.

Specifications

Motor channels: 2

Motor supply voltage: 4.5 – 13.5 V

Continuous output current per channel: 1 A

Peak output current per channel: 3 A

Auto-detect baud rate range: 1200 – 38400 bps

Fixed baud rate: 38400 bps

Available PWM frequencies: 31.5 kHz, 15.7 kHz, 7.8 kHz, 3.9 kHz

Logic supply voltage: 2.7 – 5.5 V

Reverse voltage protection?: Y (on motor supply only)

Motor driver: TB6612FNG

Important safety warning

This product is not intended for young children! Younger users should use this product only under adult

supervision. By using this product, you agree not to hold Pololu liable for any injury or damage related to

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