Each experiment comes
with a complete lesson with drawings and diagrams to explain the concepts of
digital electronics.
The Lab Manual has 39 different lessons and experiments!
Table of Contents
1 .Digital vs Analog
2. Digital Terminology
3. Solderless Circuit Board Assembly
4. LED Logic Indicator Circuit
5. 'AND' Logic Gate with discrete components
6. 'OR' Logic Gate with discrete components
7. 'NOT' and 'YES' Logic Circuits
8. 'NOR' Logic Gate
9. 'NAND' Logic Gate
10. 2 'NAND' Logic Gate Clock
11. 'NAND' Logic Gate Timer
12. 2 'NAND' Logic Gate Memory Circuit
13. 555 Timer IC and formulas
14. Binary Counter Circuit (MOD16)
15. Decade Counter Circuit (MOD10)
16.2,4,8,16 Divider Circuit
17. Digital Readout LED display
18. Digital Readout Decoder Chip
19. Digital Counter with 7-Segment Display
20. Digital UP-DOWN Counter
21. 8-Output Multiplexer Circuit
22. Digital 'Chasing Lights' Circuit
23. Visual 'Logic Probe' Circuit
24. 'Touch-Activated' Pulse Generator
25. 555 Pulse Train Generator
26. Yes/No Decision Maker Circuit
27. Yes/No/Maybe Circuit
28. Stop-Action Timing Circuit
29. Digital 'Touch-Activated' Switch
30. Digital 'Stepping Touch-Activated' Switch
31. Digital 'Light-Activated' Counter Circuit
32. 'Winning Number' Generator
33. Digital Dice Circuit
34. Introduction to Flip-Flops
35. 'D' Flip-Flop circuits
36. 'J-K' Flip-Flops
37. Schmidt Trigger
38. Shift Registers
39. OP AMP Circuits
Here is a sample experiment!:
Digital Up/Down Counter Experiment Discovery
Now you are going to build a Digital Up or Down Counter with a
Seven-Segment display. You will use the 555 Timer chip wired as an
Astable Multivibrator circuit to input pulses to cause the counter to
count.
Then you will use the 4029B chip as a Decade Up or Down Counter to count
in binary, from 0000 to 1001 or from 1001 to 0000. These binary
numbers, from the 4029B chip, will be sent to the 4511B Seven-Segment
decoder chip. The 4511B will be connected to a common-cathode
Seven-Segment display which will readout the decimal equivalents of the
binary numbers.
Wiring of the 4029B
Note that pin 10 of the 4029B is connected to ground to make it work as
an Up/Down counter. You already know that when pin 9 is connected to
ground the 4029B works as a Decade Counter.
Circuit Description
This circuit consists of a common-cathode Seven-Segment LED with pin 8,
the common- cathode, connected to ground. Note:Pin 8 and pin 3 are
connected internally, therefore we do not connect anything to pin 3.
This Seven-Segment Display is connected to an Integrated Circuit CMOS
4511B which is connected to the outputs of a 4029B counter chip. The
4029B chip is driven by a 555 Timer chip which emits clock pulses.
Each time a binary number is present on the inputs of the 4511B, a
decimal equivalent number will light up on the Seven-Segment display.
Experiment
1. Build the circuit shown, following the schematic or pictorial diagram.
2. Connect power and observe the Seven-Segment LED display count down from 9 to 0, over and over again.
3. Now, disconnect pin 10 of the 4029 from ground and connect it to positive. It should now count up from 0 to 9, over and over.
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