Data Sheet

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98. Two-channel Monitor
Build the circuit shown and turn ON
the switch (62). The lamp (76) will
simulate Morse code being silently
monitored. Then press the press
switch (61) and the simulated
Morse code signal will change.
This is similar to what a technician
working for the FBI or CIA may see
when they change the channel they
are monitoring.
Codes are only simulated, not real.
99. Silent Search for
Signals
Turn ON the switch (62) and the lamp
(76) will ash slowly simulating a
transmission being monitored. Use
one nger and tap the touch plate
(80) several times. The ashing
speed of the lamp (76) will change
when different transmissions are
found. Lamp brightness indicates
signal strength.
100. Geiger Counter
The Geiger Counter is a device for measuring radioactivity by detecting and counting ionizing particles. Replace the press
switch (61) with the reed switch (83) and turn ON the switch (62). The lamp (76) may ash slowly or be off. Move the
magnet (7) towards the reed switch (83) and the lamp (76) will turn on or ashing speed of the lamp (76) will increase
when a magnetic eld is detected. This simulation shows how a Geiger Counter measurement increases when radioactive
particles are detected.
1st level
2nd level
1st level