Found in documentation from the 1980s, this circuit uses an operational amplifier from that time. Transistors are also from the era, and general-purpose equivalents can now be used.
This circuit was originally designed for the practice of Morse code, something common in 1966, the year...
In the figure we have a traditional flip-flop configuration implemented with two operational...
We found this circuit in an American publication from the 90s. It generates pulses that can be...