Make Electronics

Experiment 21: Race to Place 206 Chapter 4 Also, there’s another problem. After a player lets his finger off the button, the oth ...

Chips, Ahoy! 207 Experiment 21: Race to Place Button Blocker Latch Button Blocker Latch Button Blocker Latch Figure 4-89. If a l ...

Experiment 21: Race to Place 208 Chapter 4 So now, finally, here’s a simplified schematic, in Figure 4-92. I like to show the pi ...

Chips, Ahoy! 209 Experiment 21: Race to Place The only way to change IC1 is if the quizmaster flips his switch back to the left. ...

Experiment 21: Race to Place 210 Chapter 4 1 8 555 1 8 555 74HC32 5V DC regulated 10K 10K OR2 OR3 OR1 10K S2 S3 S1 330 0.01 0.01 ...

Chips, Ahoy! 211 Experiment 22: Flipping and Bouncing Experiment 22: Flipping and Bouncing I mentioned in the previous experimen ...

Experiment 22: Flipping and Bouncing 212 Chapter 4 How It Works Two NOR gates or two NAND gates can function as a flip-flop: U ...

Chips, Ahoy! 213 Experiment 22: Flipping and Bouncing of the left NOR gate goes from positive to negative, as a result of the pu ...

Experiment 23: Nice Dice 214 Chapter 4 Experiment 23: Nice Dice This is the one experiment where I want you to use the 74LSxx ge ...

Chips, Ahoy! 215 Experiment 23: Nice Dice No connection No connection No connection Negative to enable Negative to enable No con ...

Experiment 23: Nice Dice 216 Chapter 4 Now we come to the first new and difficult fact about the 74LSxx generation of TTL chips ...

Chips, Ahoy! 217 Experiment 23: Nice Dice display for a finished version of the dice circuit, I’ll deal with that later. Accord- ...

Experiment 23: Nice Dice 218 Chapter 4 Getting back to our project: I want to take the three binary outputs and make them create ...

Chips, Ahoy! 219 Experiment 23: Nice Dice Each of the LEDs is grounded through a separate 4K7 load resistor. Unfortu- nately, th ...

Experiment 23: Nice Dice 220 Chapter 4 Note that to maximize this effect, the button has to be held down for a full second or mo ...

Chips, Ahoy! 221 Experiment 23: Nice Dice 1K 1K 1K 0.1uF 0.01uF D1 D2 D3 D4 5V DC regulated power supply 1 8 555 74LS 92 74LS27 ...

Experiment 23: Nice Dice 222 Chapter 4 The final enhancements are up to you. Most obviously, you can add a second die, as many g ...

Chips, Ahoy! 223 Experiment 24: Intrusion Alarm Completed Experiment 24: Intrusion Alarm Completed Now let me suggest how you ca ...

Experiment 24: Intrusion Alarm Completed 224 Chapter 4 These modifications are so simple that I think the block diagram in Figur ...

Chips, Ahoy! 225 Experiment 24: Intrusion Alarm Completed Upgrade 3: Delay Before Deactivation Typically, alarms include ano ...