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SCHEMATIC AND BILL OF MATERIALS

2.5 Motor Outputs

Connect a three-phase 5-V BLDC motor to pins A, B, C, and COM of the header J5. Polarity is not critical

for A, B, and C. If you wish to rotate the motor in the opposite direction switch two out of the three wires to

A, B, and C. The motor outputs are located on J5 as shown in Figure 9.

Figure 9. Motor Outputs

2.6 Operation of the EVM

1. Connect the included 5-V, three-phase BLDC motor to pins A, B, C, and COM of J5. The COM

connector on the included motor is colored black. Figure 10 shows an image of the motor with a red

mark next to the black wire for the COM connection.

2. Adjust the “Spd_Adj” potentiometer R2 to minimum voltage by turning it all the way counter-clockwise.

This will minimize the motor speed.

3. Apply power to the J4 header or with external USB cable plugged into a computer USB jack. DO NOT

connect to both the micro USB jack and the J4 power supply header.

4. Adjust the “Spd_Adj” potentiometer clockwise towards the motor outputs to increase speed and the

motor will start to turn. Continue adjusting as desired.

5. To change direction, switch two out of the three wires to A, B, and C.

Figure 10. COM Connection

3 SCHEMATIC AND BILL OF MATERIALS

The following pages contain the DRV10866EVM schematic and bill of materials.

SBVU020A–November 2012–Revised December 2012 DRV10866EVM User’s Guide

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