Touch switch (CB9375E)

This biestable circuit was found in a Popular Electronics from the 90s. The circuit has an unusual configuration today, using components of the time.

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PC capacitance meter CB20545E (CB20545E)
The circuit presented is an interface or shield for capacitance measurement as a PC. We found it...
Comparator with hysteresis (CB5089E)
This is one of the many hysteresis comparator circuits the reader may find in this section and on this...
Two-Power Selector Using Triac (CB515E)
When S1 is in 1, the circuit operates with of half the total power applied to the load. When in...