Found in a 1970 EEE, this circuit uses general-purpose transistors of the time. Transistors support equivalents and the ramp time ranges from 0.1 seconds to a few seconds, depending on C1.
November 2016 - NXP ARM Cortex microcontrollers for serial interfacing applications, NXP 32-bit...
This circuit was found in a 1977 Radio Handbook. Equivalent transistors can be used. The formula...
The figure shows how to implement an R-S flip-flop or bistable reset-Set with an LM3900...