This circuit is from an 80's documentation, firing when the input voltage exceeds 5 V. The SCR can be the TIC106 need not have a heatsink.
July 2017 - The new Texas Instruments UCC20520 isolated drivers are already in the stock of Mouser...
The circuit shown in the figure can be used to detect the operation of infrared sources whose...
This 2005 circuit from a Linear Technology manual makes use of the LTC610HV and an optical coupler that...