Elenco Electronics EP-130, Руководство пользователя

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If you think the NAND gate is a very versatile circuit,
you’re right! Here’s a toggle flip-flop circuit made
from four NAND gates.
Connect terminals 13 and 14 to turn the power on
after you finish building this circuit. Press the key
slowly several times. You’ll see that LED 1 turns on
or off each time the key is pressed. Put on your
thinking cap and try to trace what happens from the
key input to LED 1. Two of the four NANDs function
as an R-S flip-flop. See if you can figure out what the
remaining NANDs are doing.
This circuit is an inverter, because it takes inputs and
reverses them.
Notes:
EXPERIMENT #45: “TOGGLE FLIP-FLOP” CIRCUIT MADE FROM “NAND” GATE
Wiring Sequence:
o
13-75-85-81-49-31-42
o
14-119
o
33-57-61-87
o
40-88
o
41-74-77
o
46-102-86
o
47-53-50-76
o
78-62-48-112-116-137-121
o
51-55-60
o
52-56
o
73-54-115
o
58-59
o
82-101-111-138
o
13-14 (POWER)
Schematic