234
Input 1
Input 2
Output
LED
low
low
high
dark
high
low
high
dark
low
high
high
dark
high
high
low
illuminated
The states
high
and
low
at the inputs are achieved by toggling the respective switch. In digital electronics
such a circuit with the behaviour described above is known as
NAND gate.
A tablet or notebook PC con-
tains tens of thousands of those gates.
The circuit diagram for this experiment is shown in Chap. 3, Fig. 3.208.
2.99 Active Zener diode
Circuit 209:
Active Zener diode 4V
Setup information
Install the two transistors and the six resistors as shown in
Fig. 2.209.
The thirteen jumper wires come next.
Check the placement on the board again and only then connect the battery.
Components required:
1 x 2N3904 transistor,
1 x 2N3906 transistor,
2 x 1 k
Ω
resistors,
2 x 10 k
Ω
resistors, 2 x 100
k
Ω
resistors, 1 x breadboard,
1 x 9V battery with clip con-
nector
Fig. 2.209:
Active Zener diode 4V
Summary of Contents for ELECTRONICS EXPERIMENTS BOX
Page 4: ......
Page 265: ...267 Fig 3 56 Cir cuit 56 Audio limiter Fig 3 57 Circuit 57 Amplifier for a storm detector...
Page 269: ...271 Fig 3 64 Circuit 64 Stabilizer for 1 9 V Fig 3 65 Circuit 65 Stabilizer for 2 5 V...
Page 275: ...277 Fig 3 80 Circuit 80 Quiztimer 30 seconds Fig 3 81 Circuit 81 Handy diode tester...
Page 315: ...317 Fig 3 179 Circuit 179 HF generator 150 kHz Fig 3 180 Circuit 180 HF generator 420 kHz...
