Elenco Green Projects - Manual (Page 11)

Advanced Troubleshooting
(continued)
-10-
6. Battery (B4): Build the circuit shown here
and set the meter (M6) to the 5V setting.
• The meter will measure more than 3V if
the battery is charged up.
• If the meter pointer does not move from
zero then either the battery is completely
discharged or it is damaged.
• Turn the hand crank (HC) clockwise and
check that the yellow LED (D5) comes on
when you crank fast (indicating that the
crank is charging the battery).
• If the meter was measuring zero then
turn the crank for at least 20 seconds
with the yellow LED on to see if it can be
recharged.
• If the battery cannot be recharged, then
it is damaged.
• If the battery needs to be recharged, you
can use this circuit or see project 3 for
other charging circuits.
7. Slide switch (S5): Slide switch (S5): Build
this circuit and turn the hand crank (HC)
clockwise until an LED lights. The red LED
(D1) should light when the switch is in
position B, and the yellow LED should light
when the switch is in position C; otherwise
the slide switch is damaged.
8. Clock (T2), 470 μμF capacitor (C5), horn
(W1), and motor (M4): Build the circuit
shown below, but remove the 470 μF
capacitor. Turn the hand crank (HC)
clockwise and the clock display should turn
on.
Add the 470 μF capacitor back in; the clock
display should stay on for a while after
you stop turning the crank; otherwise the
capacitor is damaged.
• Replace the clock with the horn. Turning
the crank should sound the horn.
• Replace the horn with the motor (“+” on
top, the fan doesn’t matter). Turning the
crank clockwise should spin the motor
shaft clockwise.
9. Radio and battery eliminator: Build project
118. Turning the hand crank (HC) should
operate the radio. The radio can be tested
without the battery eliminator using two
“AAA” type 1.5V batteries (not included).
10. Pivot stand resistors: The pivot stand
base has resistors mounted inside; they
can be tested using this circuit. Turn the
hand crank (HC) clockwise to light the
LEDs. If the slide switch (S5) is in position
B then the yellow LED (D5) will be bright.
If the slide switch is in position C, the red
LED (D1) will be dim. If either LED does
not light or the red one is brighter than the
yellow then the pivot stand is damaged.
11. Check the remaining parts by inspecting
them for damage.
Elenco ® Electronics, Inc.
150 Carpenter Avenue
Wheeling, IL 60090 U.S.A.
Phone: (847) 541-3800
Fax: (847) 520-0085
e-mail: [email protected]
Website: www.elenco.com
You may order additional /
replacement parts at:
www.snapcircuits.net