Taken from a 1967 RCA publication, this circuit maintains a low current in the battery when it is charged. The components are from the era.
This Mullard circuit was found in a 1969 documentation. It uses complementary transistors on the output and...
This audio level indicator was found in October 1980 Radio Electronics magazine. See the table with...
This XR2208 application circuit was found in the April 1978 Radio Electronics magazine. The...