Raspberry Pi Forums

Hi,

I'm trying to build my first Pi project but I'm unsure of what equipment or extensions I need for that. I want to connect two stepper motors and a vibration motor to the Pi and activate them according to certain buttons pressed on a Wii remote (connecting the wiimote is a whole different problem I'm facing).

I have looked at this HAT (https://thepihut.com/products/adafruit- ... 7739845393) but it says you can either connect two stepper or four DC motors. Would I need to get two of them and stack them to have two steppers and the vibrating disk (https://thepihut.com/products/adafruit- ... motor-disc)? And what would I need to stack them?
Also, do I need to get a battery pack if I don't plan on disconnecting the Pi from the main power cable?

Lastly, I do have an Arduino starter kit which already includes a stepper motor. Are the Arduino elements compatible with the Pi? From what I've seen online the motors look identical.

Hi.

Do you really need another motor hat to drive your vibrating mini motor disc ?

you only need to turn it on or off and no direction change needed, so you could just drive it using a gpio pin and a transistor as suggested in text.

a simple 2N2222 transistor & 470 ohm resistor is all you would need.

as the motor hat only uses I2c to control it , you still have all the other gpio pins free to drive the vibrating mini motor disc.

it would also be cheaper than a second hat.

pcmanbob wrote: ↑

Thu Jun 20, 2019 10:59 am

as the motor hat only uses I2c to control it , you still have all the other gpio pins free to drive the vibrating mini motor disc.

Hi, thanks for the tip.

I have connected the hat to my Pi now but it has taken up all the pins of the 40 GPIO as far as I can see? Which other pins do you mean?

Did you look at your hat , there is a row of holes marked as gpio pins which you can use ( green arrow ) and 5v and ground in another row of pins
( yellow arrow )




I suggest you go and read the documentation on the site you posted the link to.

https://learn.adafruit.com/adafruit-dc- ... spberry-pi