AM Radio with LM4862 and ZN414 (CB26112E)

This medium wave receiver was featured in the November 1999 issue of Electronics Now magazine. It is powered by just two small batteries.

| Clique na imagem para ampliar |

High speed alarm (CB20663E)
Found in documentation from the 1970s, this circuit uses an oscillator and a display to warn of...
Simple Siren 555 (CB3862E)
This circuit simulates a low-level siren and can be supplied with voltages from 5 to 15 V....
Frequency Selector 741 (CB16232E)
The filter shown in the figure, using only an operational amplifier, is characterized by allowing 1...