This circuit tunes MW radios to apply the signal to a good audio amplifier. The circuit is from an old documentation. Transistors are general purpose types.
This digital clock has a traditional configuration with well-known CMOS integrated circuits. The...
This experimental radio was obtained in an old Argentine publication. Germanium transistors are...
This circuit was found in an EDN from the 90s. The circuit employs a double 555 and uses the...