11
1 The Experiment Box
1.1 What’s inside the experiment box
1.1.1 Breadboard
All of the experiments are built on a convenient breadboard. The red lines demonstrate how the board is
wired internally. Connectors of components and any jumper wires are simply inserted into the contacts.
When finished with your experiment, pull out all the components and the wires. Thus you will have them
ready for the next new experiments. Please read our tip on “Successful equipping” in Chap. 1.2.1.
Fig. 1.1:
The breadboard that is
included in the experiment box
1.1.2 Transistors
One of the most important active components in modern electronics and also in our experimental package
is the transistor. It is used to amplify smaller signals and to switch currents. NPN and PNP transistors differ
in polarity, but otherwise they are the same. FET transistors have a very high internal resistance, compara-
ble to that of electron tubes, while incident light controls the current flow through phototransistors.
Fig. 1.2:
The component symbol is on the left and for information,
the circuit diagram symbol of the 2N3904 NPN bipolar transistor
on the right; the experimental package contains two of them.
Fig. 1.3:
The component symbol is on the left and for information,
the circuit diagram symbol of the 2N3906 NPN bipolar transistor
on the right; the experimental package contains one only.
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...
