What is the best way to get
220V AC present/absent to TTL logic representation ?
(open collector, 10-15 mA)
I experimented with cny17-3 and I conclude it takes too much
input current (more then 6 mA) to saturate it's output transistor.
Too much input current means more power for resistors and
bigger cap.
Is there a better solution?
Thanks.
220V AC present/absent to TTL logic representation ?
(open collector, 10-15 mA)
I experimented with cny17-3 and I conclude it takes too much
input current (more then 6 mA) to saturate it's output transistor.
Too much input current means more power for resistors and
bigger cap.
Is there a better solution?
Thanks.