Timeline for How to float the output of an optocoupler when needed?
Current License: CC BY-SA 3.0
5 events
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| Jan 7, 2014 at 8:23 | comment | added | HenningNT | Sorry for the late reply! No, you do not need a series resistor on the inputs. But remember, always check the datasheet for any device you use, it usually covers the typical usage scenarios. | |
| Jan 2, 2014 at 17:59 | vote | accept | dodo | ||
| Jan 2, 2014 at 17:59 | comment | added | dodo | I agree. Now I'm planning to use 74xx244 to buffer multiple input lines. I have one last question, would I need to connect series resistors to its inputs to limit current or do these 74xx devices already do it by themselves? | |
| Jan 2, 2014 at 17:42 | comment | added | The Photon | I think this is the best solution, but if I went this way I would probably also switch to an optocoupler with totem-pole outputs instead of 6N137. FOD0721 seems to have similar speed specs and would eliminate external pull-up components. | |
| Jan 2, 2014 at 12:32 | history | answered | HenningNT | CC BY-SA 3.0 |