This Power supply sources from 500 to 1,000 mA according the transformar and was found in a publication of the year 1958. The diodes can be now the 1N4004 and the transistor should be mounted on a heatsink.
This simple circuit with SCR and unijunction transistor appeared in Radio Electronics magazine in July...
This circuit was found in an English magazine from 1977. The critical component is the gas sensor....
This circuit doubles the frequency of a rectangular signal applied to its input. The circuit has a...