Robot Building for Beginners, Third Edition

CHAPTER 17 ■ DC MOTORS The escap motor was received second-hand, so I don’t know the nominal voltage. Assuming 12 V, this high-q ...

APPENDIX A ■ APPENDIX A Let’s say you find a 220 W resistor. You measure the voltage by touching the multimeter probes to each e ...

CHAPTER 17 ■ DC MOTORS To be fair, the escap motor costs 10 times as much, weighs 2.5 times as much, has ¼ the RPM at 3 V, and i ...

APPENDIX A ■ APPENDIX A Things I’ve Accidentally Destroyed While Writing This Book Sometimes after I read a good book about robo ...

CHAPTER 17 ■ DC MOTORS Luckily, it’s not that bad. There’s a property called inductance that doesn’t like to see a sudden change ...

APPENDIX A ■ APPENDIX A After wiring and soldering up a couple of micro switches (see Figure A-4), they were installed in the li ...

CHAPTER 17 ■ DC MOTORS Load Current As force is added to the shaft of the motor, by attaching wheels or driving a robot uphill, ...

APPENDIX A ■ APPENDIX A In writing a book, a lot of time is spent researching and validating facts. Since it’s going to be on pa ...

CHAPTER 17 ■ DC MOTORS Efficiency Characteristic of DC Motors Regardless of how efficiently a robot utilizes a motor, the motor ...

APPENDIX A ■ APPENDIX A As you move forward in electronics, you’ll run across other terms for voltages. It’s worth knowing these ...

CHAPTER 17 ■ DC MOTORS Little noise ripples do exist even in the power-off state, but contrast them with the no-load spikes. Loo ...

APPENDIX A ■ APPENDIX A Practical Example On a 74LS04 (bipolar-based) chip, the power supply pins are labeled VCC and GND. The p ...

CHAPTER 17 ■ DC MOTORS Summarizing the Characteristics of DC Motors When examining an advertisement or datasheet for a motor, he ...

APPENDIX B ■ Appendix B: Appendix B This appendix covers printing Sandwich robot parts. A 3D printer is so essential to robotics ...

CHAPTER 17 ■ DC MOTORS Gearhead motors almost always reduce the speed of the motor in exchange for increased twisting force (tor ...

APPENDIX B ■ APPENDIX B Custom-designed robot bodies can be smaller and lighter. Rather than using screws to fasten together mul ...

CHAPTER 17 ■ DC MOTORS Revealing Pairs of Smaller and Larger Gears A spur gear is a circle with pointy teeth on the perimeter. T ...

APPENDIX B ■ APPENDIX B What if you don’t have the money to buy a 3D printer, don’t have the knowledge to choose a printer, or a ...

CHAPTER 17 ■ DC MOTORS Describing Gear Ratios When all of the teeth of the larger gears have been added up, and all of the teeth ...

APPENDIX B ■ APPENDIX B Designing the Model The first step in 3D printing is to create or obtain a 3D model. Think of this like ...