Timeline for Isolated digital input to microcontroller using optocoupler
Current License: CC BY-SA 4.0
17 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| May 23, 2023 at 11:23 | vote | accept | John Mist | ||
| Oct 14, 2022 at 13:02 | comment | added | Lundin | Again, you still haven't explained why you must use separate grounds. | |
| Oct 14, 2022 at 5:20 | comment | added | John Mist | @Lundin I've already mentioned before that I forgot to put the ground reference of the sensor power source | |
| Oct 13, 2022 at 13:57 | comment | added | Lundin | "because the sensor operating voltage is 5-24v" So what? Just do a plain voltage divider. "Both are from different sources" And you can't ground them together because...? | |
| Oct 13, 2022 at 8:06 | comment | added | John Mist | @Lundin because the sensor operating voltage is 5-24v and the controller operating voltage is 3.3v. Both are from different sources so. | |
| Oct 13, 2022 at 7:29 | comment | added | Lundin | Well, doh... Why do you need isolation? | |
| Oct 13, 2022 at 7:28 | comment | added | John Mist | @Lundin to provide isolation between sensor out and controller digital input | |
| Oct 13, 2022 at 6:40 | comment | added | Lundin | Why do you need the optocoupler in the first place? | |
| Oct 13, 2022 at 5:10 | comment | added | John Mist | yeah I forgot to put the ground reference of sensor power source | |
| Oct 12, 2022 at 16:24 | history | edited | toolic | CC BY-SA 4.0 |
deleted 11 characters in body
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| Oct 12, 2022 at 16:21 | comment | added | brhans | But you have the same GND net connected on both sides of the optocoupler - so it's not isolated. | |
| Oct 12, 2022 at 16:20 | history | edited | brhans | CC BY-SA 4.0 |
added 9 characters in body
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| Oct 12, 2022 at 15:32 | answer | added | V.V.T | timeline score: 0 | |
| Oct 12, 2022 at 13:49 | comment | added | John Mist | It's just an label. The input is connected from another source. | |
| Oct 12, 2022 at 13:45 | comment | added | Andy aka | Your circuit indicates the the input is not isolated. | |
| Oct 12, 2022 at 13:31 | answer | added | DKNguyen | timeline score: 1 | |
| Oct 12, 2022 at 13:25 | history | asked | John Mist | CC BY-SA 4.0 |