Light aircraft often use a heading indicator as a way to know where they’re going. Retired instrumentation engineer [Don Welch] recreated a heading indicator of his own, using cheap ...

Nothing ruins a great movie night faster than suffering through muffled dialogue or wimpy bass. And unfortunately, even pricey TVs often have underpowered speakers. That's why I almost always ...

Optical sensors are a broad class of device for detecting light intensity. This can be just a simple component for notifying when ambient light levels rise above or fall below a prescribed level, or a ...