The figure shows a remote-control receiver working the 27 MHz band, very popular in the 60’s. The circuit us from a February 1961 Radio Electronics magazine.
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...