Compared to the Arduino Uno of old, modern microcontrollers are absolutely tiny — especially for the amount of processing power and I/O you get. But if you need something really small, like ...

Many people believe that the LED was discovered by US researchers working in the 1960s. In fact, Henry Round at Marconi Labs noted the emission of light from a semiconductor diode 100 years ago and, ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Rory Evans Rory Evans is a writer focused on skin-care and beauty products.

July 1, 2026 at 9:01 a.m. After 40 years, the past six as editor of the La Jolla Light, Rob Vardon ...