Powerful Projects with Your Timex/Sinclair

Explains how to use your microcomputer to control external devices, including how to build a speech output module, a power controller, an interface connector, a temperature sensor and other I/O devices. For each, you get a schematic plus some hints on construction. Photos and sketches help you build these projects. Includes software descriptions to run these devices. Projects for TS 1000 and TS 2068 computers.

Contents

1 The Timex/Sinclair 2068

• The 2068 System
• The Z80 CPU
• The Control Software

2 Interfacing to the Real World

• The Control Devices
• Backward Designing
• The Interfacing Components
• Prototyping
• Constructing the Pulse Detector

3 Simple Interfacing Hardware

• Electronic Hobby Skills
• The Power Supply
• The Backplane Connector
• Buffering the Signals
• Decoding
• Constructing the 7475 Output Port
• Constructing the 8212 Input Port

4 Advanced Computer Control

• Home Electrical Control
• Home Lighting Control
• The Three-Channel Home-Appliance Controller
• The Mail Indicator
• The Automatic Tape-Recorder Controller

5 Microbotics

• Robotics
• Robotic Parts
• The Robotic Platform
• The Robotic Arm and Hand
• Robotic Feedback

6 Advanced Feedback Projects

• The Speech Synthesizer for the Robot
• The Analog-to-Digital Converter
• The Weather Station
• The Moisture Detector
• The Wind Indicator
• The Temperature Sensor

7 Going Further

Appendixes

• Appendix A: Mail Order Suppliers
• Appendix B: The 2068 Memory Map
• Appendix C: Frequently Used Z80 Instructions
• Appendix D: Pinouts of Interfacing Components
• Appendix E: Transistor Configurations
• Appendix F: Common Schematic Symbols
• Appendix G: The Resistor Color Code
• Appendix H: A Device-Select Pulse Decoder for the TS 1000 and 1500
• Appendix I: Converting 2068 Software for the TS 1000 and 1500

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