The indicated circuit uses an unusual buffer from National Semiconductor. The frequency is given by resistors R1 and R2 as well as capacitors C1 and C2.
Found in Radio Electronics from the 90s, this circuit generates signals from 100 Hz to 1.5 kHz....
November 2016 - Mouser Electronics is offering the new series of Littelfuse HMOV varistors with...
Found in an Electronic Design from the 90s, this circuit uses a component of the time, difficult...