The integrated circuit used in this detector is uncommon today. We found it in a documentation from the 70s. Detection is done by an optical camera with LEDs and a photo sensor.
We found this touch control on a Popular Electronics from 1970. The circuit makes use of an...
We found this circuit in a 1989 publication. Its purpose is to produce noise in the VHF or UHF...
This is the power source suggested in the old European publication for the CB19635E watch. The...