Make Electronics

Experiment 15: Intrusion Alarm Revisited 146 Chapter 3 Now deal with the power supply. Use your AC adapter, set to 12 volts, hoo ...

4 147 Chips, Ahoy! Before I get into the fascinating topic of integrated circuit (IC) chips, I have to make a confession: some o ...

Shopping List: Experiments 16 Through 24 148 Chapter 4 FundAmentAls Choosing chips Figure 4-2 shows what is often referred to ...

Chips, Ahoy! 149 Shopping List: Experiments 16 Through 24 FundAmentAls Choosing chips (continued) After the letters identif ...

Shopping List: Experiments 16 Through 24 150 Chapter 4 Here’s your chip list: 555 Timer. STMicroelectronics SA555N, Fairchild N ...

Chips, Ahoy! 151 Shopping List: Experiments 16 Through 24 Latching relays You’re going to need a 5-volt latching relay that has ...

Shopping List: Experiments 16 Through 24 152 Chapter 4 Figure 4-10. When shopping for a numeric keypad, it should have 12 keys i ...

Chips, Ahoy! 153 Experiment 16: Emitting a Pulse Experiment 16: Emitting a Pulse I’m going to introduce you to the most successf ...

Experiment 16: Emitting a Pulse 154 Chapter 4 Insert the chip in your breadboard so that its pins straddle the channel down the ...

Chips, Ahoy! 155 Experiment 16: Emitting a Pulse Set your power supply to deliver 9 volts. It will be convenient for this experi ...

Experiment 16: Emitting a Pulse 156 Chapter 4 The graphs in Figure 4-17 illustrate what is happening. The upper graph shows the ...

Chips, Ahoy! 157 Experiment 16: Emitting a Pulse 0v 3v 6v 9v 0v 3v 6v 9v pulse width remains fixed at 5.2 seconds Pressing and r ...

Experiment 16: Emitting a Pulse 158 Chapter 4 theory Inside the 555 timer: monostable mode The plastic body of the 555 timer ...

Chips, Ahoy! 159 Experiment 16: Emitting a Pulse theory Inside the 555 timer: monostable mode (continued) The green rectan ...

Experiment 16: Emitting a Pulse 160 Chapter 4 BAckground How the timer was born Back in 1970, when barely a half-dozen corpora ...

Chips, Ahoy! 161 Experiment 16: Emitting a Pulse FundAmentAls Why the 555 is useful In its monostable mode (which is what you j ...

Experiment 17: Set Your Tone 162 Chapter 4 Experiment 17: Set Your Tone I’m going to show you two other ways in which the 555 ti ...

Chips, Ahoy! 163 Experiment 17: Set Your Tone Figure 4-21. These components should be added on the same breadboard below the com ...

Experiment 17: Set Your Tone 164 Chapter 4 theory Inside the 555 timer: astable mode Here’s what is happening now, illustrated ...

Chips, Ahoy! 165 Experiment 17: Set Your Tone theory Inside the 555 timer: astable mode (continued) R1 now controls the cha ...