The figure shows how to implement a filter against interference caused by the switching of a triac. The circuit is from a Radio Electronics from April 1987.
This circuit is suggested by Texas Instruments in his Optoelectronics Sourcebook. The transistors...
This circuit was found in an English documentation from the 90s. It uses a PLL CMOS 4046 and is...
The circuit is from an old documentation making use of an operational amplifier of the time. The...