Make Electronics

Experiment 19: Learning Logic 186 Chapter 4 essentIAls Logic gate basics The NAND gate is the most fundamental building blo ...

Chips, Ahoy! 187 Experiment 19: Learning Logic essentIAls Logic gate basics (continued) If you have difficulty visualizing ...

Experiment 19: Learning Logic 188 Chapter 4 essentIAls Logic gate basics (continued) B A B OR A A A B B NO NO NO NOYESYES ...

Chips, Ahoy! 189 Experiment 19: Learning Logic essentIAls Logic gate basics (continued) B A B A XOR A A B B NO NO NO NOYES ...

Experiment 19: Learning Logic 190 Chapter 4 BAckground The confusing world of TTL and CMOS Back in the 1960s, the first log ...

Chips, Ahoy! 191 Experiment 19: Learning Logic BAckground The confusing world of TTL and CMOS (continued) CMOS family: 4 ...

Experiment 19: Learning Logic 192 Chapter 4 BAckground The confusing world of TTL and CMOS (continued) Bottom line: I su ...

Chips, Ahoy! 193 Experiment 19: Learning Logic FundAmentAls Common part numbers Each 14-pin chip can contain four 2-input ga ...

Experiment 19: Learning Logic 194 Chapter 4 FundAmentAls Rules for connecting logic gates Permitted: You can connect the i ...

Chips, Ahoy! 195 Experiment 19: Learning Logic FundAmentAls Rules for connecting logic gates (continued) Not permitted: ...

Experiment 19: Learning Logic 196 Chapter 4 In the 74HCxx logic family, each input of a logic gate consumes just a micro- amp, w ...

Chips, Ahoy! 197 Experiment 20: A Powerful Combination Experiment 20: A Powerful Combination Suppose you want to prevent other p ...

Experiment 20: A Powerful Combination 198 Chapter 4 Latching relay, 5 volt, DPST or DPDT, “2 form C” package, Panasonic DS2E- S ...

Chips, Ahoy! 199 Experiment 20: A Powerful Combination I want this to be a battery-powered circuit, so that you don’t have to ru ...

Experiment 20: A Powerful Combination 200 Chapter 4 Incorrect Inputs What happens if you enter the wrong code? If you press an ...

Chips, Ahoy! 201 Experiment 20: A Powerful Combination To help it make sense, I’ve shown the logic gates that exist inside the c ...

Experiment 20: A Powerful Combination 202 Chapter 4 One Little Detail: The Computer Interface Old computers used to have a b ...

Chips, Ahoy! 203 Experiment 20: A Powerful Combination Power Up button on computer Solder joints Heat-shrink tubing (not yet shr ...

Experiment 20: A Powerful Combination 204 Chapter 4 Another enhancement could be an additional 555 timer that is activated by th ...

Chips, Ahoy! 205 Experiment 21: Race to Place Experiment 21: Race to Place The next project is going to get us deeper into the c ...