Found in an Electronics Now from the 90s, this circuit appears elsewhere in this section and website. The diodes are for general use and the basic frequency is given by C.
This conventional power supply circuit with the LM317 was found in a 1987 publication and its...
July 2017 - The new TLP240 and TLP241A optical couplers with MOSFET output, manufactured by...
This is the receiver for the previous circuit found in the November 1991 Radio Electronics...