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We found this circuit in GE's 1977 semiconductor manual. The optical isolator uses an opto-SCR, and the lamp must be 25 W maximum. Only incandescent lamps should be used.
The circuit we have just described has been mounted in the car of the author of the project for...
This circuit was found in an old European publication, but it can be implemented with more modern...
This circuit is based on a PLL 566 and generates positive ramps. The frequency depends on Rx and C...