We present the circuit of the commercial transistor tester Sanwa SC2 sold in Japan in the 1960s. The circuit has several scales and types of test being powered by a 22.5 V battery.
This experimental TTL circuit is from 1992 documentation. It produces programmed sounds set in the...
This circuit is from a 1968 Electronic Design. The characteristics of the output transformer are not...
In the figure we have a circuit that fires from a positive pulse of short duration applied to its...