پروژه‌های آسان افزونه برای کامودور ۶۴، ویک-۲۰، بی‌بی‌سی میکرو و آکورن الکترون

Easy Add-on Projects for Commodore 64, VIC-20, BBC Micro and Acorn Electron - This book describes how to build a number of electronic projects which you can use with your Commodore 64, VIC-20, BBC Micro or Acorn Electron. - The projects include a Pulse Detector, Picture Digitiser, Five-key Pad, Model Controller, Bleeper, Lamp Flasher, Light Pen, Magnetic Catch, Lap Sensor, Photo-flash, Games Control and six more projects that make up a Weather Station. - All the projects are fairly simple and inexpensive to construct. The most complicated part, the Address Decoder, is constructed as a separate item that can then be used with any of the projects. - Once built, the projects are easy to operate and a simple program or two is included to get you started. Of course, those readers who are more experienced at programming can have a lot of fun in writing elaborate programs for these projects, but the beginner can start with a short program and perhaps add extra features later. Contents Page INTRODUCTION I Interfacing to Microcomputers " , I Logic Levels in Computers 2 User Port 2 Decoder 6 Programming Summ aries 15 Project I: PULSE DETECTOR 19 How It Works 19 Building It 21 Using It 21 Detecti ng 8 "'High Pulse" 23 Project2: PICTURE OIGITISER 24 How It Works 24 Building It 29 Final Check 33 Test Program 33 Programming " , , 35 Project 3: FIVE·KEY PAD 41 HowIt Works 43 Building It 45 Testing 46 Project 4: MODEL CONTROLLER 50 How It Works 50 Building It 55 Programming 57 ProjectS: BLEEPER 62 How It Works 62 Building It , 64 Programming 67 Page Project6, LAMP FLASHER 68 How It Works · 68 Building It 71 Programming 71 Project 7, LIGHT PEN 73 How It Works · 73 Building It 74 Progrlllllllling 81 Project8, MAGNETIC CATCH 85 How It Works · 85 Building It 88 ~~IlJl1ll1lin g 92 , Project 9, LAP SENSOR 94 How It Works · 94 Building It 97 ~~llrlll1ling 98 Project 10, PHOTO· FLASH 101 How It Works · 102 )f>l"()irI"llIllrlling lOS Project II, GAMES CONTROL 109 How It Works · 109 Building It 112 )f>ro~arllrlling 114 Project 12, RAIN DETECTOR 116 How It Works 116 Building It 117 ~irI"IlIllJ1l i n g 118 Project 13, WEATHERCOCK 120 How It Works 120 Buildi ng the Vane 123 Building the Ci rcuit 124 Jl1r()~ll rJlIlling 125 Page Project 14, ANEMOMETER 127 How It Works 128 Build ing It 130 Programming 132 Project 15, THERMOMETER 135 How It Works 135 Building It 138 Calibration and Programming : 139 Project 16, BAROMETER 143 HowIt Works 143 Building It 147 Programming 150 Project 17, SUNSHINE RECORDER 155 How It Works 155 Building lt 158 Appendix k THE DECODER 165 How It Works 165 Power ~uJ'J'lies 169 Building the Decoder 171 A5sembling the PCB 171 IC Sockets 177 Fitting the Case 177 Decoder/ComJ'uter 1nterconnectors 178 Testing 183 Appendix B, DECODER WITH AN INTERFACE FOR THE ACORN ELECTRON 165 How It Works 185 Testing the Elect) on Version of the Decoder 186 Programming 187 Appendix C, SUPPLIERS OF PCB AND KITS 188 AppendixTh PIN ANDLEAD·OUTDETAIIS 190