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195. Switch 1
Assemble the circuit. Open breaker
15
(ON) – LED
17
will switch on. Open the breaker (OFF) –
the LED will go out. Press and release button 14. With the help of a magnet, close and open the
reed switch "13". The LED will turn on and off. But the electric motor
24
will rotate if it is helped
a little by turning the shaft. Now touch the sensor plate
12
with a dry finger – nothing happens.
Wet your finger with water and touch the sensor plate; the LED will barely light up and the motor
will not work.
196. Switch 2
Replace LED
17
with bulb 18. Close switch
15
(ON) – the bulb will first light up brightly, and then
the brightness will decrease and the engine will rotate. Open the breaker (OFF). Press and release
button 14. With the help of a magnet, close and open the reed switch "13". Now touch the sensor
plate
12
with a dry finger – nothing happens. Wet your finger with water and touch the touch
pad; nothing will work now either. Try to explain why that happens.
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197. Changing the direction of rotation
Assemble the circuit. Press and release button
14
– the propeller will rotate counterclockwise.
13
Using a magnet, close and open reed switch
– the propeller will rotate clockwise. Change the
polarity of the electric motor connection ("plus" below). Make sure the circuit works the other
way around.
We don't recommend simultaneously closing the button and the reed switch (switch) for a long time!
198. Stopping the engine
Replace switch
13
with switch 15. Close breaker
15
(ON). The propeller will start to rotate clock-
14
wise. Press button
– the propeller will stop, but if you continue to hold it, it will start rotating in
the other direction.
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