LM386音频放大器IC可用于设计简单的无线电接收器电路，并且这些电路还能提供惊人的高性能。这些电路可用于接收中、短波波段的AM、CW和SSB射频传输，而不需要外部天线。 尽管无处不在的LM386 IC一开始是设计用作音频放大器，但它有许多未记录的特性，可 ...

“You can’t put new wine in old bottles” – so the saying goes. But you would if you’re a hacker stuck with a radio built in 2005, which looked like it was put together using technology from 1975.