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Step 4Build the circuit
Stack the two batteries and tape them together, place two wires in contact with the positive and negative poles.
Connect the switch to the positive wire.
You want the LEDs to be set in parallel, so connect them both to the wires.
Keep the switch turned on, so that you can test LEDs and respect the polarity.
Connect the switch to the positive wire.
You want the LEDs to be set in parallel, so connect them both to the wires.
Keep the switch turned on, so that you can test LEDs and respect the polarity.
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