Robot Building for Beginners, Third Edition
CHAPTER 26 ■ SMOOTHER, SMALLER, CHEAPER Lowering Light Sensor Resistance Let’s break down the circuit. The first alteration plac ...
CHAPTER 26 ■ SMOOTHER, SMALLER, CHEAPER In the old arrangement, the comparator would compare TP1 to TP2 for one motor and compar ...
CHAPTER 26 ■ SMOOTHER, SMALLER, CHEAPER Like most new electronic devices, the modern Sandwich is powered by a rechargeable lithi ...
CHAPTER 26 ■ SMOOTHER, SMALLER, CHEAPER The sensor and headlight potentiometers have been removed. Instead of manually adjustin ...
CHAPTER 26 ■ SMOOTHER, SMALLER, CHEAPER Size is not the only benefit of surface-mount parts. Because these parts are used in hig ...
CHAPTER 26 ■ SMOOTHER, SMALLER, CHEAPER Despite being transistors, most phototransistors are not externally connected to the bas ...
CHAPTER 26 ■ SMOOTHER, SMALLER, CHEAPER Automatically Detecting Line Type The original Sandwich includes a physical toggle switc ...
CHAPTER 26 ■ SMOOTHER, SMALLER, CHEAPER Saving Money The cost difference in the motors is overwhelming. The original motors are ...
CHAPTER 26 ■ SMOOTHER, SMALLER, CHEAPER Spending Money There were a couple of parts that increased the cost of the robot. The mi ...
CHAPTER 27 Encore You’ve gained an understanding of the items and methods needed to get a good start at robot building. You’ve r ...
CHAPTER 27 ■ ENCORE Like a six-pack of beer, simpler logic chips contain multiple copies of the same function in a single packag ...
CHAPTER 27 ■ ENCORE Microcontroller Costs Microcontrollers are relatively inexpensive, most cost between $1 and $15 each in sing ...
CHAPTER 27 ■ ENCORE Voltage Regulator Packages Like other parts, voltage regulators come in a variety of packages (see Figure 27 ...
CHAPTER 27 ■ ENCORE Selection Criteria When selecting a voltage regulator, look for your desired final output voltage, the minim ...
CHAPTER 27 ■ ENCORE 1 pF to 1 mF: used in moderately accurate timing circuits. 1 pF to 40 pF: vital for high-accuracy crystal-b ...
CHAPTER 27 ■ ENCORE BEAM Robots There’s a whole class of tiny, simple robots that utilize solar panels instead of batteries. The ...
CHAPTER 27 ■ ENCORE Pushbuttons Most pushbuttons are spring-loaded switches. Push down and the switch connects, let go and the s ...
CHAPTER 27 ■ ENCORE A word of warning with pushbuttons and switches: there’s a moment during the physical transition between on ...
CHAPTER 27 ■ ENCORE A plastic piece, called a “shorting block” (see Figure 27-10), containing a thin strip of metal is placed ov ...
CHAPTER 27 ■ ENCORE I can’t imagine the part will work while the robot is moving, since the ball probably bounces around a lot. ...
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