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 or an AtMega8. Use 4 pins for the driver out, and 1 pin out to indicate if the motor is stopped. One input pin for direction and one for start/stop. The rest will be used for speed and steps. The idea is that another controller can give the driver and order like "take 120 steps over 3 seconds".

I should also do this at least once with a real stepper driver.