Describes a precision controller which is cheap and uses a pair of operational amplifiers. It contains forward and reverse switches and enables visual indication of train performance. A full circuit diagram is given and technical data of all components are listed. The operation of the circuit is explained, including lamp indicator of speed. The train current is limited to about 1 ampere. The track voltage is determined by a potentiometer.
Model train speed control
Eisenbahngeschwindigkeits-Regelungsmodell
Revista Espanola de Electronica ; 22 , 249 ; 31
1975
Aufsatz (Zeitschrift)
Englisch
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