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How to make an H-bridge

Step 11For a few wires more.

For a few wires more.
Attach 5" of wire to the pins on the side of the SPST relay tubes that currently have no wires attached to it.

If there is a red +9V wire on the middle pin on the one side of the tube that currently has wires on it, then also attach a red wire on the side your currently attaching wires to. If there is a black wire on the side with all the wires, then attach a black wire on this side.

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