This circuit was found in a 1967 RCA manual. The transistors are of the time. The adjustment is made to read 7.15 V on the charged battery and the charging current is 3.2 A.
Found in an 70s Electronic Engineering, this circuit divides the pulse frequency by non-integer...
This circuit generates 50, 100 and 200 Hz signals from a 2.2768 MHz TV crystal. The circuit can be...
This circuit was found in an old publication from 1975 and 2N2222 transistors can be used instead of...