Advertisement
44
Electronic
sensors
YOU WILL NEED
+ 2 resistors, 470 Ω
+ 1 red LED
+ 2 transistor modules
+ 2 short wire bridges
+ 1 long wire connector
+ electronics board
+ battery clip
+ and additional household
item: 9-volt square battery
HERE'S HOW
1. Assemble the components as
shown in the circuit diagram. At
terminal B, insert a long wire
vertically, like an antenna.
2. Make an "O" with your thumb and
forefinger, and lower this "O" over
the antenna without touching it.
Shuffle or rub your feet a few times
against the floor.
Do you notice anything?
R 1
470
A
B
T1
LED 1
R 2
470
+
9V
–
T2
R1
470 Ω
LED1
A
A
C
B
T1
T2
EXPERIMENT 19
+
–
R2
470 Ω
Advertisement
