Larry Cotton

Larry Cotton is a semi-retired power-tool designer and part-time community college math instructor. He loves music and musical instruments, computers, birds, electronics, furniture design, and his wife — not necessarily in that order.

Latest from Larry Cotton

Upgrade Your Coffee Roasting Setup With This Wobbling Disk

Upgrade Your Coffee Roasting Setup With This Wobbling Disk

09/01/2021

Fabricate the eccentrically optimum bean stirring device for a perfect roast.

My 15-Year Quest to Make the Ultimate DIY Coffee Roaster

My 15-Year Quest to Make the Ultimate DIY Coffee Roaster

07/26/2021

One man's 15-year quest to build — and rebuild, and rebuild — the ultimate DIY coffee roaster

Simple Sifter Coffee Roaster

Simple Sifter Coffee Roaster

11/27/2019

Hack a flour sifter and a heat gun to roast the ultimate bean.

Pecan Blaster: A High-Power Inertia Nutcracker

Pecan Blaster: A High-Power Inertia Nutcracker

01/10/2019

Make a twin-solenoid power nutcracker that bashes the shells and saves the meats

Dog Bowl Coffee Roaster

Dog Bowl Coffee Roaster

09/07/2018

Built-in bowl spinner, bean stirrer, and heat gun achieve a perfectly even roast, automatically

Draw Abstract Art with a Random Number Generator

Draw Abstract Art with a Random Number Generator

09/18/2017

This number generator squiggles the numbers it produces as a flurry of random lines in an artistic interpretation of abstract...

Use Stepper Motors for Unique, Analog-Style Clocks

Use Stepper Motors for Unique, Analog-Style Clocks

03/03/2017

This is no ordinary, circular time telling device. Build your own clock with this elegant and uncommon face.

Use Solenoids to Build a MIDI-Controlled Percussion Bot

Use Solenoids to Build a MIDI-Controlled Percussion Bot

05/03/2016

How I built a crazy percussion robot with simple solenoids and a MIDIWidget

Explore Chaos Theory with an LED Double Pendulum

Explore Chaos Theory with an LED Double Pendulum

03/04/2016

Pendulums are often meditative, but this double pendulum with attached LEDs spins in crazy unpredictable and highly entertaining ways.

Build a Rotating Feeder for Perfect Bird Pictures

Build a Rotating Feeder for Perfect Bird Pictures

07/16/2015

Birds make lousy subjects for digital photographs. But you can perfect shot, thanks to a long shutter-release cable and a...

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