This circuit was found in the 1992 Radio Electronics Handbook. It is used to test VCR recording heads. It can also be used for other purposes.
This TTL bistable or flip-flop with the 7400 was found in an 80's publication. It is a didactic...
This circuit amplifies the signals of an operational amplifier with output values that depend on...
In the figure we have the simple way to use a low current switch or sensor to drive a high power...