Introduction

Part 1: Instructions for Building an Interval Timer on a Protoboard

Exercise 1: Building the Prototype Interval Timer

Part 2: Effect of Component Tolerances (Probability Density Functions)

Exercise 2: Probability Density Functions

PART 3: Designing for a Specified Time Interval

Exercise 3: Nominal Value Graph and Measurments

PART 4: The Annual 1 Minute Interval Timer Contest Exercise 4: Finishing Up

Appendix A: How the Interval Timer Works

Appendix B: The Monte Carlo Computer Method

Appendix C: A Computer Program for Designing Interval Timers