Forrest M. Mims III

Forrest M. Mims III

Forrest M. Mims III (, an amateur scientist and Rolex Award winner, was named by Discover magazine as one of the “50 Best Brains in Science.” His books have sold more than 7 million copies.

Latest from Forrest M. Mims III


Have you wondered why some sunsets are so spectacular and others so drab? This ultra-sensitive photometer project will allow you to tease out the secrets of twilight and even do serious science by finding the altitude of the dust, smoke, and air pollution that influence the colors of twilight. Read more »


My DIY wearable gadget never sold — but it led to my first article, a kit company, and a career in electronics and science. Here's how a failure became a springboard to success. Read more »


On the 40th anniversary of the Altair 8800 microcomputer: 1975–2015. Though primitive by today’s standards, the Altair 8800 is widely credited with jump-starting the personal computer era. Read more »


Use cheap photoresistors, phototransistors, and photodiodes to make powerful sensors for your projects. Read more »

A Mars-Bot will include the drive and steering mechanisms of a conventional competition robot, plus a wireless video cam and various sensors.

A simulated space mission could leverage the popularity of robotics competitions to teach science. Read more »


Since an electromagnetic telephone receiver can double as a microphone, can a semiconductor light emitting diode (LED) double as a light detector? Read more »


Use data loggers and DIY sensors to map temperatures where you live. Towns are hotter than countryside, parking lots are scorching compared to green fields — what else can you discover? Another great amateur science project from Forrest M. Mims III, who shows you how to build and mount simple... Read more »