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A toggle switch is a switch that turns circuits on and
off. Here we use the flip-flop circuit to work as a
toggle switch. In the previous project, the circuit
flipped and flopped automatically. In this project, the
circuit does not change until you tell it to.
After you complete the wiring, set the switch to A.
The lower segment of the LED lights. Now press the
key. The lower segment goes off and the upper
segment lights. Each time you press the key the
LED segments change – flip and flop.
When one transistor is on, the other is off; it stays on
(or off) until you tell it to change. So, we can say that
flip-flop circuits can remember things. When you
leave a circuit in a certain condition, it stays in that
condition until you want to change it. Many flip-flops
that are controlled by a single toggle signal can
remember many things. That is how computers can
remember so many things.
Notes:
EXPERIMENT #33: TRANSISTOR “TOGGLE FLIP-FLOP”
Wiring Sequence:
o
84-108-44-17
o
81-106-41-20
o
25-124-137
o
40-107-83
o
42-110-72
o
45-130
o
43-105-82
o
71-75-111-131-129
o
76-109-112-138
o
119-132
o
121-122
Schematic
Summary of Contents for EP-130
Page 11: ... 11 I ENTERTAINMENT CIRCUITS ...
Page 26: ... 26 II BASIC SEMICONDUCTOR AND COMPONENTS CIRCUITS ...
Page 36: ... 36 III LED DIGITAL DISPLAY CIRCUITS ...
Page 41: ... 41 IV A TOUR THROUGH DIGITAL CIRCUITS ...
Page 49: ... 49 V MORE ADVENTURES WITH DIGITAL CIRCUITS ...
Page 64: ... 64 VI THE WORLD OF TRANSISTOR TRANSISTOR LOGIC ...
Page 77: ... 77 VII APPLICATION CIRCUITS BASED ON THE OSCILLATOR ...
Page 88: ... 88 VIII BASIC OPERATIONAL AMPLIFIER CIRCUITS ...
Page 116: ... 116 IX MORE ADVENTURES WITH OPERATIONAL AMPLIFIERS ...
Page 129: ... 129 X COMMUNICATION CIRCUITS ...