Triac Heating control (CB21372E)

We found this circuit in a 1966 RCA manual. The integrated circuit is unusual, and the Triac must match the load.

Solar Cell Switched Regulator (CB1187E)
This circuit was found in a Popular Electronics from April 1993. It is a voltage regulator circuit...
Binary Generator (CB25392E)
This staircase generator was found in the July 1991 issue of Radio Electronics magazine. Its...
5 V x 10 A Regulator LM109 (CB14505E)
The LM109 can be found with different origins. The circuit shown specifically is from Motorola's Linear...