This circuit was found in a 90’s Popular Electronics. The power transistors must be equipped with radiators and the transformer has a 2 to 5 A secondary.
This circuit is from American documentation from 1973. It can be used to indicate when the logic...
This bar or moving point indicator (bargraph) employs the LM3914 and can excite 10 LEDs, of any...
Texas Instruments has downloadable documentation on designing digital isolators. The Digital...