This circuit triggers by choosing the higher of two voltages. The circuit is from a 1964 Electronic Design. The transistors are of the time and can be replaced by current equivalents.
This circuit using a SIDAC is suggested by ON Semiconductor in its thyristor manual. The circuit...
January 2017 - The new Honeywell RSC TruStability ™ pressure sensor mounting board is available from...
Suggested by Motorola in 1968 documentation, this circuit has an efficiency of 70%. Power...