Contenido

  1. Introduction
  2. History: a computer from the catalogue
  3. Lesson 0. Gates from transistors: for those who start from scratch
    1. 0.1. The idea: a transistor is a switch
    2. 0.2. Building
    3. 0.3. Check
    4. Lesson 0 paste (Cmd+I)
  4. Lesson 1. Logic in packages: 74HC00, 02, 04, 08, 32
    1. 1.1. The idea: a chip is a package with gates
    2. 1.2. The idea: free inputs go to ground
    3. 1.3. The idea: a latch from one chip
    4. 1.4. Building
    5. 1.5. Check
    6. Lesson 1 paste (Cmd+I)
  5. Lesson 2. Flip-flops in a package: 74HC74 and a frequency divider
    1. 2.1. The idea: a flip-flop with set and reset
    2. 2.2. The idea: six NANDs inside
    3. 2.3. The idea: a divider is a flip-flop that flips
    4. 2.4. Building
    5. 2.5. Check
    6. Lesson 2 paste (Cmd+I)
  6. Lesson 3. A counter in a package: 74HC390 and a stopwatch
    1. 3.1. The idea: ÷2 and ÷5 make ÷10
    2. 3.2. The idea: clocking on the fall
    3. 3.3. The idea: reset on a one
    4. 3.4. Building
    5. 3.5. Check
    6. Lesson 3 paste (Cmd+I)
  7. Lesson 4. A decoder in a package: 74HC138 and a running light
    1. 4.1. The idea: number → one wire
    2. 4.2. The idea: active 0
    3. 4.3. The idea: 4 → 16 from two 3 → 8
    4. 4.4. Building
    5. 4.5. Check
    6. Lesson 4 paste (Cmd+I)
  8. Lesson 5. A shift register: 74HC595 and 8 lamps over three wires
    1. 5.1. The idea: bits over one wire
    2. 5.2. The idea: a latch shows everything at once
    3. 5.3. The idea: the third state
    4. 5.4. Building
    5. 5.5. Check
    6. Lesson 5 paste (Cmd+I)
  9. Lesson 6. Bus buffers: 74HC244 and 74HC245
    1. 6.1. The idea: a bus and the third state
    2. 6.2. The idea: a buffer is a double inversion
    3. 6.3. The idea: both ways — two 74HC244
    4. 6.4. Building
    5. 6.5. Check
    6. Lesson 6 paste (Cmd+I)
  10. Lesson 7. An electronic dice
    1. 7.1. The idea: a counter to six
    2. 7.2. The idea: face number → dots
    3. 7.3. The idea: a fair roll
    4. 7.4. Building
    5. 7.5. Check
    6. Lesson 7 paste (Cmd+I)
  11. Summary
  12. All the parts
  13. Instructions in pictures