This circuit was found in a 1964 Electronic Design. The circuit delays the firing of a load for a time given by RC. The SCR must be in accordance with the controlled load.
This circuit is from a 2004 documentation serving for signals from 1 MHz to 160 MHz. The antenna is...
This filter of two transistors has the cutoff frequency determined by the formulas next to the...
This Philips commercial circuit is from the 90's documentation. The integrated circuit must be...