Poison hemlock has spread throughout the US. Here's how to kill it. Lexus Signals That It's Killing Off the IS, and This ...

[Ynze] has built an audio amplifier that looks and sounds ... his local 230V mains down to +25V and -25V. The amplifier circuit itself is simple – a few discrete components surround the LM3886 ...

Guitar amplifiers are a frequent project, and despite being little more than a simple audio amplifier on paper, they conceal a surprising quantity of variables in search of a particular sound.