Have you always wanted to build this awesome robot? Or build your own 3D printer? Or a motorized slider for your SLR to get your photography to the next level? Let your dreams come true with the new DC+Stepper Motor HAT from Adafruit. This Raspberry Pi add-on is perfect for any motion project as it can drive up to 4 DC or 2 Stepper motors with full PWM speed control.
Since the Raspberry Pi does not have a lot of PWM pins, the Stepper Motor HAT uses a fully-dedicated PWM driver chip onboard to both control motor direction and speed. This chip handles all the motor and speed controls over I2C. Only two pins (SDA & SCL) are required to drive the multiple motors, and since it’s I2C you can also connect any other I2C devices or HATs to the same pins.
In fact, you can even stack multiple Motor HATs, up to 32 of them, for controlling up to 64 stepper motors or 128 DC motors (or a mix of the two) – just remember to purchase and solder in a stacking header.
Motors are controlled by TB6612 MOSFET drivers with 1.2A per channel current capability (you can draw up to 3A peak for approx 20ms at a time), a big improvement over L293D drivers and there are built-in flyback diodes as well. The HAT is assembled and tested so all you have to do is solder on the included 2×20 plain header and the terminal blocks.
The DC+Stepper Motor HAT comes as an assembled & tested HAT with terminal blocks and 2×20 plain header. Some soldering is required to assemble the headers on.
Get your Stepper Motor HAT haere:
- 4 H-Bridges: TB6612 chipset provides 1.2A per bridge with thermal shutdown protection, internal kickback protection diodes. Can run motors on 4.5VDC to 13.5VDC.
- Up to 4 bi-directional DC motors with individual 8-bit speed selection (so, about 0.5% resolution)
- Up to 2 stepper motors (unipolar or bipolar) with single coil, double coil, interleaved or micro-stepping.
- Big terminal block connectors to easily hook up wires (18-26AWG) and power
- Polarity protected 2-pin terminal block and jumper to connect external 5-12VDC power
- Works best with Raspberry Pi model A+, B+, or Pi 2
- Install the easy-to-use Python library, check out the examples and you’re ready to go!
- Stepper Motor HAT Pinout
- Dimensions w/ components: 65mm x 56mm x 13mm / 2.6″ x 2.2″ x 0.5″
- Datasheets, schematic, PCB files, and Fritzing available in the Adafruit product tutorial