I'm building a telephone ring counter circuit.Need to check the attached circuit.
I have two questions
1)How many pulses will comes out per one ring from opto output?
2)what are the voltages in the telephone line ? When idle -48V DC & when rings 90V AC?
I have two questions
1)How many pulses will comes out per one ring from opto output?
2)what are the voltages in the telephone line ? When idle -48V DC & when rings 90V AC?
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