Dennis Johnson

High Voltage in a Vacuum - Lightning in a Bottle

Old School Wireless Communications - Part 2 - Morse Code Receiver/Writer

Old School Wireless Communications - Part 1 - Spark Transmitter

Solenoid Engine Version 2

Solenoid Engine

Homemade Model Steam Engine

Linear To Rotary Motion

Dorothy’s Weaving

Linear To Rotary Motion

3 Cylinder Opposed Piston Compressed Air Engine

LED Chaser Circuit Problem And Solution

Compressed Air Engine - Pumping Water

Compressed Air Engine - Part 2 - Turning A Wheel

2 Cylinder Push-Pull Compressed Air Engine

Compressed Air Engine

Funicular fun

Generate electricity using gravity

Thermo-magnetic Curie Motor

Telling Time With Bleach

Making music with bleach

Hydraulic Engine Contraption

Contraption That Rings A Bell