Ken O'Donnell Engineering Logo Ken O'Donnell

Personal Projects

A few favorite projects from my free time.

Note: All images are my own.

Photo of Hydrogen Generator and Control Panel

Hydrogen Generator

Built a split-output hydrogen generator and control panel. The unit splits H2O molecules and outputs hydrogen and oxygen while collecting the gases separately.

Photo of 8-Bit Adder

8-Bit Binary Adder

Built an 8-bit adder that can add two numbers together using individual transistors. Each board contains a series of logic gates that constitute 1 bit. The output is displayed using LEDs.

Image of Launched Hobby Rocket

Rocketry

Built and launched several rockets with basic household materials and ingredients.

Collage of Multiple Astronomical Object Photos

Astrophotography

Photographed several astronomical objects including Mercury, Venus, Mars, Jupiter, Saturn, and the Moon.

Photo of Wooden DNA Helix

Wooden DNA Helix

Designed and constructed a wooden DNA helix. Sawn laminates of timber, soaked and glued in a helical shape.

Photo of Paver Blocks

Concrete Paver Blocks

Designed and built a small production line for manufacturing trihex concrete paver blocks. Included material screening and batching line.

Photo of Stone Sphere Machine

Stone Sphere Machine

Built a machine to grind stone and other hard materials into perfect spheres.

Photo of a Reclaimer

Homemade Lightbulb

Constructed a copy carbon filament Edison light bulb.

© 2026 Ken O'Donnell. All rights reserved.