Found in Texas Instruments documentation from the 90's, this circuit can be used as a shield due its symmetrical power is 5 V. The circuit has offset adjustment and a pass band of 200 kHz.
In the figure we have the way to control a triac with a low current and low voltage switch,...
This trigger circuit was found in old European documentation, but it can be implemented with...
May 2017 - The new ROHM SFR series anti-sulfur resistors can now be obtained from Mouser...