This high voltage circuit was found in a 1970 documentation. The integrated one is of the time and modern equivalents can be tested. The resistors of the voltage reducing system must be calculated.
The FAN1117A and FAN1117A-5 integrated circuits from Fairchild consist of fixed and adjustable...
This circuit was found on an 80's Ham Radio. The transistor admits equivalent. The circuit can...
This sensitive receiver with earphone was found in an English documentation from 1963. The...