Elenco Green Projects - Manual (Page 35)

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Replace the horn or red LED
with the motor (M4, with wind
fan blade) or yellow LED (D5).
Try different combinations and
see how the current changes.
Build the circuit and set the meter (M6) to the
50mA setting. Push the switch (S2); the meter
measures the current from the battery (B4).
Part B: swap the location of the meter with the
3-snap wire marked “B” (“+” side towards the
horn (W1)). Push the switch to measure the
current through the horn.
Part C: swap the “B” location of the meter with
the “C” 3-snap. Push the switch to measure
the current through the red LED (D1).
Part B
Project #44 Splitting Current
Part C
+
The current from the battery splits up between the horn and the LED. If
you add up the current you measured through the horn and LED (Parts
B & C), it should be the same as the current you measured from the
battery. (Your result may be a little different, because M6 is a simple
meter with low accuracy.)
C B
Project #45
Splitting Current
Differently
Project #46
Splitting Different
Currents
Replace the battery (B4) with
the solar cell (B7). Try different
combinations and see how the
current changes.
50mA
See projects 1 & 3 if you need to recharge the battery (B4).