This power supply for model railroad was found in a February 1961 Radio Electronics Magazine. The transistor must be mounted on a heatsink and the transformer is a 1,5A secondary winding.
This circuit for communications receivers was found in the January 1974 issue of Radio Electronics...
This circuit was obtained in a 1982 magazine. In it we have the way to connect two integrated...
Texas Instruments Type D flipflops N74LVC1G79 and SN74LVC1G179-Q1 for operation from 1.65 to 5.5V...