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30
Lengthening the
cycle time
YOU WILL NEED
+ your timer from
Experiment 9
+ capacitor 100 µF
HERE'S HOW
1. Replace the 10-µF capacitor in
your timer switch with the
100-µF one.
2. Connect the battery and wait until
the timer is ready.
3. Press once on the pushbutton.
What has changed since
Experiment 9?
R1
3.3 kΩ
LED1
A
Pb1
R4
R3
470 Ω
100 kΩ
R2
22 kΩ
+
T1
C1 100 µF
LED 1
R 1
R 3
3.3 k
470
Ta 1
C 1
100 F
T1
R 4
100 k
R 2
22 k
EXPERIMENT 10
+
LED2
C
A
C
–
R5
R6
220 kΩ
470 Ω
T2
LED 2
R 5
R 6
220 k
470
+
–
T2
9V
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