CONTENTS 1
CHAPTER 1:Introduction 1
CHAPTER 2:The Projects 4
Project 1-Simple Burglar Alarm 4
Project 2-Exit Delay Burglar Alarm 10
Project 3-Simple Alarm Generator 14
Project 4-Modulated Alarm Generator 20
Project 5-Varying Tone Alarm Generator 25
Project 6-Logic Tester 28
Project 7-Games Timer 33
Project 8-Flashing Pilot Light 38
Project 9-Telephone/DoorbellMonitor 42
Project 10-Telephone/Doorbell Repeater 47
Project 11-Supply Voltage Monitor 52
Project 12-Battery Voltage Monitor 57
Project 13-Flat Battery Alarm 61
Project 14-Computer Voice 65
Project 15-Peak Level Indicator 70
Project 16-LED Pendant 75
Project 17-Sleep Timer 80
Project 18-Burglar Deterrent 85
Project 19-Quiz Monitor 90
Project 20-Development Timer 94
Project 21-One Second Ticker 99
Project 22-Bent Wire Game 103
Project 23-Simple Train Signal 108
Project 24-Automatic Signal 112
Project 25-Race Starter 117
Project 26-Digital Die 121
Project 27-Reaction Game 127
Project 28-Reaction Tester 131
Project 29-Automatic Counter 135
Project 30-Two Contact Touch Switch 139