This different circuit was patented and described in the Radio Electronics magazine of March 1958. In that section it used to present different configurations that received patents.
Found in American documentation from the 90s, this circuit can be applied to other operational ones. We...
We found this circuit in the Texas Instruments opto-electronics manual. The button resets and the...
We found this circuit in an old American publication. The transistors can be BC558 and diode 1N34....