Flasher CA3130 (CB22004E)

Found in an English documentation from 1977, this flasher or pulser circuit drives an LED. The frequency depends on C2.

Two way intercom (CB20505E)
This circuit works with only 1.5 V and can be powered by a solar panel. The circuit is from 1991....
Digital Timer (CB17006E)
This digital timer provides timings from 1 minute to 10 hours with indication on a 3-digit...
Japanese Radio TR 72 (CB18369E)
This sensitive Japanese mid-wave receiver from the 1960s has an output power of 45 mW and is...