Make Electronics

Experiment 17: Set Your Tone 166 Chapter 4 FundAmentAls The following table shows 555 timer frequency in astable mode: Frequenc ...

Chips, Ahoy! 167 Experiment 17: Set Your Tone A primary advantage of using pin 5 to adjust frequency is that you can control it ...

Experiment 17: Set Your Tone 168 Chapter 4 You can also use the output from one chip to trigger another (i.e., you can con- nect ...

Chips, Ahoy! 169 Experiment 17: Set Your Tone Halve the value of R5 while doubling the value of C4, so that the cycle time of I ...

Experiment 18: Reaction Timer 170 Chapter 4 Experiment 18: Reaction Timer Because the 555 can easily run at thousands of cycles ...

Chips, Ahoy! 171 Experiment 18: Reaction Timer Check Figure 4-33 showing the Kingbright display, and you’ll see I have an- notat ...

Experiment 18: Reaction Timer 172 Chapter 4 Grounding Yourself To avoid the frustration that occurs when you power up a circuit ...

Chips, Ahoy! 173 Experiment 18: Reaction Timer FundAmentAls Counters and seven-segment displays Most counters accept a stre ...

Experiment 18: Reaction Timer 174 Chapter 4 something magical about seeing a display count from 000 through 999 “all by itself,” ...

Chips, Ahoy! 175 Experiment 18: Reaction Timer Pulse Generation A 555 timer is ideal for driving a counter chip. You’ve alread ...

Experiment 18: Reaction Timer 176 Chapter 4 Refinements Now it’s time to remember that what we really want this circuit to do is ...

Chips, Ahoy! 177 Experiment 18: Reaction Timer In bistable mode, the 555 has turned into one big flip-flop. To avoid any un- cer ...

Experiment 18: Reaction Timer 178 Chapter 4 The Delay Suppose we set up yet another 555 in monostable mode. Trigger its pin 2 wi ...

Chips, Ahoy! 179 Experiment 18: Reaction Timer Low voltage on pin 2 of IC1 allows IC1 to start counting. User presses S3, the “ ...

Experiment 18: Reaction Timer 180 Chapter 4 First remove the 1 μF capacitor at C2 and substitute a 10 μF capacitor. Because you ...

Chips, Ahoy! 181 Experiment 19: Learning Logic Summing Up This project demonstrated how a counter chip can be controlled, how co ...

Experiment 19: Learning Logic 182 Chapter 4 10K 10K 1K 74HC00 NAND gate LM7805 0.33uF 0.1uF 9v DC Figure 4-46. By observing the ...

Chips, Ahoy! 183 Experiment 19: Learning Logic The 74HC00 actually contains four NAND gates, each with two logical inputs and on ...

Experiment 19: Learning Logic 184 Chapter 4 BAckground From Boole to Shannon George Boole was a British mathematician, bor ...

Chips, Ahoy! 185 Experiment 19: Learning Logic BAckground From Boole to Shannon (continued) Ann is wearing the hat Bob is ...