161
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. Unlike the previous
experiment, the states must be manually wired. In digital electronics such a circuit with the behaviour
described above is known as
NAND gate
. A tablet or notebook PC contains tens of thousands of those
gates.
The circuit diagram for this experiment is shown in Chap. 3, Fig. 3.135.
Circuit 136:
NAND gate with moving-coil instrument
Setup information
Install the transistor, the three diodes and the four resistors as shown in
Fig. 2.136.
Then insert the four
jumper wires followed by the jumpers, which serve as switches (shown dashed). For your guidance, we
have labelled the switches with
high E1
,
low E1
and
high E2
,
low E2
Last but not least connect the moving-coil instrument. Check the placement on the board again and only
then connect the battery.
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...
