Assembly instructions for kit #5
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18. Attach the battery holder to the board. The battery holder allows you to experiment with 4
different voltage settings (1.5, 3, 4.5, and 6 V DC). You will need 4 AA size batteries.
To understand how the jumper wire works let's take a look at the connections inside a
typical battery holder:
The following diagram shows how to get 1.5, 3, 4.5, and 6 Volts using 1, 2, 3, or 4 batteries
and a jumper wire shown in blue color. Arrows show the current flow for 1.5, 3, and 4.5
Volts settings. Could you trace the current when all 4 batteries are inserted (there is no
jumper wire in this case)?