Tim Kralj

Week 10

This week was spent around output devices.

Stepper output

My output device chosen was a stepper motor. Well 2 stepper motors. This is a part from my final that was used to power the final board and rotations. See the final document for details on how it plays into my other parts together.

I finished off the project using the same board as mentioned in the project page. The board has 4 h bridges, an attiny1614 and many resistors and capactiors. Each H bridge is powered by a central line of wall power coming in at 9 volts with a barrel plug converter from the wall. This is used to get gnd and wall power to the system. In addition, each h bridge is connected with 2 capactiors to reduce the variance in voltage going through the h bridge system. Each h bridge takes in 2 outputs from the 1614, gnd, vdd, and vbb. This is then converted into 2 outputs each that are fed into an 8 pin connecter at the end. These 8 pins are the wires going into the 2 steppers (4 per stepper).

The stepper motors are coded with c code and then controlled by an ATTiny1614. The two motors are able to spin with commands that are given to the motor from the microcontroller. The code is below.

I learned a lot about how to program a stepper this week! It took way too much effort to get the stepper running correctly but was super exciting when they both spun!