You are previewing Make: Electronics.

Make: Electronics

Cover of Make: Electronics by Charles Platt Published by Maker Media, Inc
  1. Preface
  2. 1. Experiencing Electricity
    1. Shopping List: Experiments 1 Through 5
    2. Experiment 1: Taste the Power!
    3. Experiment 2: Let’s Abuse a Battery!
    4. Experiment 3: Your First Circuit
    5. Experiment 4: Varying the Voltage
    6. Experiment 5: Let’s Make a Battery
  3. 2. Switching Basics and More
    1. Shopping List: Experiments 6 Through 11
    2. Experiment 6: Very Simple Switching
    3. Experiment 7: Relay-Driven LEDs
    4. Experiment 8: A Relay Oscillator
    5. Experiment 9: Time and Capacitors
    6. Experiment 10: Transistor Switching
    7. Experiment 11: A Modular Project
  4. 3. Getting Somewhat More Serious
    1. Shopping List: Experiments 12 Through 15
    2. Experiment 12: Joining Two Wires Together
    3. Experiment 13: Broil an LED
    4. Experiment 14: A Pulsing Glow
    5. Experiment 15: Intrusion Alarm Revisited
  5. 4. Chips, Ahoy!
    1. Shopping List: Experiments 16 Through 24
    2. Experiment 16: Emitting a Pulse
    3. Experiment 17: Set Your Tone
    4. Experiment 18: Reaction Timer
    5. Experiment 19: Learning Logic
    6. Experiment 20: A Powerful Combination
    7. Experiment 21: Race to Place
    8. Experiment 22: Flipping and Bouncing
    9. Experiment 23: Nice Dice
    10. Experiment 24: Intrusion Alarm Completed
  6. 5. What Next?
    1. Shopping List: Experiments 25 Through 36
    2. Customizing Your Work Area
    3. Reference Sources
    4. Experiment 25: Magnetism
    5. Experiment 26: Tabletop Power Generation
    6. Experiment 27: Loudspeaker Destruction
    7. Experiment 28: Making a Coil React
    8. Experiment 29: Filtering Frequencies
    9. Experiment 30: Fuzz
    10. Experiment 31: One Radio, No Solder, No Power
    11. Experiment 32: A Little Robot Cart
    12. Experiment 33: Moving in Steps
    13. Experiment 34: Hardware Meets Software
    14. Experiment 35: Checking the Real World
    15. Experiment 36: The Lock, Revisited
    16. In Closing
  7. Appendix. Online Retail Sources and Manufacturers
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2. Switching Basics and More

The concept of switching is fundamental in electronics, and I’m not just talking about power switches. By “switching,” I mean using one flow of electricity to switch, or control, another. This is such an important principle that no digital device can exist without it.

Today, switching is mostly done with semiconductors. Before I deal with them, I’ll back up and illustrate the concept by introducing you to relays, which are easier to understand, because you can see what’s going on inside them. And before I get to relays, I’ll deal with everyday on/off switches, which may seem very simple—but we have to nail down the basics.

Also in this chapter, I’ll deal with capacitance, because capacitance and resistance are fundamental ...

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