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Adafruit TB6612 1.2A DC/Stepper Motor Driver Breakout Board

Created by lady ada

Last updated on 2016-10-01 06:35:33 PM UTC

Summary of content (16 pages)

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Adafruit TB6612 1.
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Guide Contents Guide Contents Overview Pinouts Power Pins Signal in Pins Motor Out Pins Assembly 2 3 7 7 8 8 9 Prepare the header strip: Add the breakout board: And Solder! 9 10 11 Using Stepper Motors Wiring Software Downloads Files Schematic Fabrication print 12 12 13 15 15 15 15 © Adafruit Industries https://learn.adafruit.
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Overview Fire four solenoids, spin two DC motors or step one bi-polar or uni-polar stepper with 1.2A per channel using the TB6612. These are perhaps better known as "the drivers in our assembled Adafruit Motorshield (http://adafru.it/1438) or Motor HAT (http://adafru.it/eRq)" We really like these dual H-bridges, so if you want to control motors without a shield or HAT these are easy to include on any solderless breadboard or perma-proto. © Adafruit Industries https://learn.adafruit.
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We solder on TB6612 onto a breakout board for you here, with a polarity protection FET on the motor voltage input and a pullup on the "standby" enable pin. Each breakout chip contains two full H-bridges (four half H-bridges). That means you can drive four solenoids, two DC motors bi-directionally, or one stepper motor. Just make sure they're good for 1.2 Amp or less of current, since that's the limit of this chip. They do handle a peak of 3A but that's just for a short amount of time, about 20 milliseconds.
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There's two digital inputs per H-bridge (one for each half of the bridge) as well as a PWM input per driver so you can control motor speed. Runs at 2.7V-5V logic. The motor voltage is separate from the logic voltage. Good for motor voltages from 4.5V up to 13.5V! This wont work well for 3V motors. © Adafruit Industries https://learn.adafruit.
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Comes as one assembled and tested breakout plus a small strip of header. You'll need to do some light soldering to attach the header onto the breakout PCB. Arduino, motors, and power supply not included. © Adafruit Industries https://learn.adafruit.
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Pinouts This motor driver is a fairly simple breakout of the TB6612 motor chip, so do check out the datasheet for the TB6612 for any details you need about pin voltage limits, capacitance, etc! (http://adafru.it/emK) Power Pins Vmotor - This is the voltage for the motors, not for the logic level. Keep this voltage between 4.5V and 13.5V.
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your microcontroller. E.g. for Arduinos, 5V is probably what you want. Can be 2.7V to 5.5V so good for 3V or 5V logic GND - This is the shared logic and motor ground. All grounds are connected Signal in Pins These are all 'Vcc logic level' inputs INA1, INA2 - these are the two inputs to the Motor A H-bridges PWMA - this is the PWM input for the Motor A H-bridges, if you dont need PWM control, connect this to logic high.
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Assembly Prepare the header strip: Cut the strip to length if necessary. It will be easier to solder if you insert it into a breadboard - long pins down © Adafruit Industries https://learn.adafruit.
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Add the breakout board: Place the breakout board over the pins so that the short pins poke through the breakout pads © Adafruit Industries https://learn.adafruit.
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And Solder! Be sure to solder all pins for reliable electrical contact. (For tips on soldering, be sure to check out our Guide to Excellent Soldering (http://adafru.it/aTk)). © Adafruit Industries https://learn.adafruit.
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Using Stepper Motors In this example we'll wire up and use a bi-polar stepper motor with recommended 12V motor voltage, and 200 steps per rotation. Wiring We'll wire it to a Metro, but you can use any microcontroller you like! Connect: Vmotor to 12V (red wire) Vcc to 5V (orange wire) GND to ground © Adafruit Industries https://learn.adafruit.
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AIN2 to Digital 4 AIN1 to Digital 5 BIN1 to Digital 6 BIN2 to Digital 7 PWMA and PWMB to Vcc (orange wire) Then hook one stepper motor coil to Motor A (red and yellow) and the second coil to Motor B (green and gray/brown). If you have another motor, you'll need to experiment a little to figure out which wires are which coil. Check any documentation you have! You can use a multimeter to measure between wires, the ones with a small resistance between them are a pair to a coil, for example.
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Software We'll use the built-in Arduino Stepper library (http://adafru.it/eRw), but you can manually toggle the AIN1/AIN2/BIN1/BIN2 pins with your own favorite microcontroller setup #include // change this to the number of steps on your motor #define STEPS 200 // create an instance of the stepper class, specifying // the number of steps of the motor and the pins it's // attached to Stepper stepper(STEPS, 4, 5, 6, 7); void setup() { Serial.begin(9600); Serial.
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Downloads Files This motor driver is a fairly simple breakout of the TB6612 motor chip, so do check out the datasheet for the TB6612 for any details you need about pin voltage limits, capacitance, etc! (http://adafru.it/emK) Fritzing object in the Adafruit Fritzing Library (http://adafru.it/aP3) EagleCAD PCB files (http://adafru.it/rF1) Schematic Fabrication print © Adafruit Industries https://learn.adafruit.