This circuit from a 1970s General Electric publication applies to motors of the series winding type. SCRs support current equivalents and must be equipped with heat sinks.
This circuit is from a Popular Electronics from July 1990. The magazine no longer exists, but the...
Other operational amplifiers series, such as MC34072, MC34074, MC35071, MC35072, MC35074 d MC33071...
This gain 10 CMOS op amp was found in the May 1993 issue of Electronics Now magazine. It is...