140
2.52 Flickering light
Circuit 115:
Flickering light
Setup information
Install the two transistors, the LED, the six resistors and the electrolytic capacitor as shown in
Fig. 2.115.
Finally, insert the eleven jumper wires. Check the placement on the board again and only then connect the
battery.
Components required:
1 x 2N3904 transistor,
1 x 2N3906 transistor,
1 x red LED, 3 x 1 k
Ω
resis-
tors, 2 x 10 k
Ω
resistors,
1 x 220 k
Ω
resistor,
1 x 10 μF electrolytic
capacitor, 1 x breadboard,
1 x 9V battery with clip
connector
Fig. 2.115:
Flickering light
Experiment
This circuit is a simple AF amplifier whose output is connected to a red LED. If you tap the input with your
finger, the LED flickers briefly. The circuit diagram for this experiment is shown in Chap. 3, Fig. 3.115.
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...
