Electronics Exercises

This document tracks a number of small exercises to prototype. The goal is not a final product but skill building.

• Control a stepper motor
• Rotary encode rotation data
• Use a servo-motor
• Build a filter (Hi-pass, low-pass, mid-pass)
• Use the AVR chip from an Arduino (off the board)
• Build a class D amp
• Use an FTDI chip with AVR
• Use an SPI LCD with AVR

Stepper

First, control it with manual switches.

I'd like to build a driver around the AtTiny2313. It has 18 IO pins. I'll use 4 pins for the driver out, 1 pin for direction, 1 pin out to indicate if the motor is stopped. That leaves 12 pins for steps and speed.