Robot Building for Beginners, Third Edition
CHAPTER 15 ■ COMPARATORS Connect IC1 to the sensor test points (look ahead at Figure 15-7, if necessary) using reinforced jumper ...
CHAPTER 25 ■ LAUNCHING THE LINE-FOLLOWER Be sure to place the diode so that the anode (plain end) connects to the power switch a ...
CHAPTER 15 ■ COMPARATORS Test point 1 (TP1) connects to IC1 input B-, which is then connected to IC1 input A+. Test point 2 (TP2 ...
CHAPTER 25 ■ LAUNCHING THE LINE-FOLLOWER Improving Line-Following Cadmium-sulfide photoresistors react fairly slowly to changes ...
CHAPTER 15 ■ COMPARATORS Check that positive power is being supplied to the top wire of R1, R7, R8, and IC1 V+ (pin 8). You can ...
CHAPTER 25 ■ LAUNCHING THE LINE-FOLLOWER In the first frame, the right LEDs are lit. Since the robot is following a dark line on ...
CHAPTER 15 ■ COMPARATORS Figure 15-9. Moving the comparator input’s jumper wire from the sensor test points (left) to the power ...
CHAPTER 25 ■ LAUNCHING THE LINE-FOLLOWER There’s a problem, though. Check out the position of the right wheel at the time the ri ...
CHAPTER 15 ■ COMPARATORS The only trick to keep in mind when stringing on additional LEDs is that the voltage of each LED needs ...
CHAPTER 25 ■ LAUNCHING THE LINE-FOLLOWER Figure 25-13. Left to right: Sandwich, Blue Sandwich, and Red Sandwich Final Bow I hope ...
CHAPTER 15 ■ COMPARATORS For the purpose of solderless-breadboard experiments, I settled on a current-limiting resistor of 470 W ...
CHAPTER 26 ■ Chapter 26: Smoother, Smaller, Cheaper Sandwich uses a “preprogrammed” chip and large through-hole parts so that th ...
CHAPTER 15 ■ COMPARATORS Repeating the Multiple LED Trick You’ve just learned that you can add extra LEDs without greater batter ...
CHAPTER 26 ■ SMOOTHER, SMALLER, CHEAPER Lowering Light Sensor Resistance Let’s break down the circuit. The first alteration plac ...
CHAPTER 15 ■ COMPARATORS Appreciating a Simple Mind The line-following circuit is taking shape. The comparator makes a fine brai ...
CHAPTER 26 ■ SMOOTHER, SMALLER, CHEAPER In the old arrangement, the comparator would compare TP1 to TP2 for one motor and compar ...
CHAPTER 16 Transistor Switches When a chip pin provides current like the positive terminal of a battery, it is said to “source” ...
CHAPTER 26 ■ SMOOTHER, SMALLER, CHEAPER Like most new electronic devices, the modern Sandwich is powered by a rechargeable lithi ...
CHAPTER 16 ■ TRANSISTOR SWITCHES Focusing on the 2907A Transistor The 2907A transistor (see Figure 16-1) is more formally referr ...
CHAPTER 26 ■ SMOOTHER, SMALLER, CHEAPER The sensor and headlight potentiometers have been removed. Instead of manually adjustin ...
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