Paper Circuits Knife Switch

Knife switches are a fun way to visualize how a circuit becomes completed when a switch is engaged.

It’s easy to see how the switch is “opened” or “closed” which represent the two states of a single throw switch.

Knife switches are not used for most modern day circuits as they have been replaced by switches that are safer at high voltages, but since we’ll be working with low voltage circuits this DIY cardboard knife switch is perfect!

Materials Needed:

• 1/4″ Maker Tape
• Cardboard
• 3 Brass Fasteners
• scissors
• X-ACTO Knife

Written instructions for this project can be found here.

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