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.
This circuit generates sinusoidal signals from 15 Hz to 15 kHz. The circuit is from Electronics Now...
This circuit was obtained in a Radio Shack documentation from 1977. The circuit generates a...
This bird circuit found in several versions on this site uses a light sensor (LDR) firing when the...