This UPS circuit was published in the March 1985 issue of Radio Electronics magazine. The components used are still common, although some may be difficult to obtain.
The circuit is from an old American magazine EDN of 1975, but can be mounted with ease with common...
This circuit was obtained from the July 1970 issue of Radio Electronics magazine. The circuit...
With this circuit it is possible to simultaneously control two low voltage incandescent lamps. SCRs...