In this circuit R1 is 56 ohm and R2 is 220 ohm for the 110 V network. SCRs are according to the load. We found it in Philips 1968 documentation.
This digital instrument input circuit was found in the September 1989 issue of Radio Electronics...
Found in an Electronic Design of 1964, this circuit operates with control voltages from 0 to 12 V...
This two-way switch or control shows how to control a lamp from two points. This version is from a...