In the figure we have the way to obtain the Exclusive-OR function with 1 transistor. The circuit is from a 1964 Electronic Design. The transistor can be any general purpose PNP.
This dimmer with a unijunction transistor and SCR appeared in Radio Electronics magazine in March...
This circuit is from a 1995 Electronics Now. It generates a 1 kHz sinusoidal signal. See in the...
This input circuit for an oscilloscope was found in Radio Electronics from the 90s. The operating...