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Step 8Start the power cap.
The water bottle cap is going to be where the 9V battery plugs into. There will be a microswitch in the top.
Towards the top edge, cut a small rectangle for the switch to be able to fit within and slide back and forth. On the wall of the same edge, make a hole large enough for two wires to pass through.
Towards the top edge, cut a small rectangle for the switch to be able to fit within and slide back and forth. On the wall of the same edge, make a hole large enough for two wires to pass through.
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