Timeline for ON-OFF Transistor Application
Current License: CC BY-SA 4.0
13 events
| when toggle format | what | by | license | comment | |
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| May 29, 2023 at 12:27 | vote | accept | Gripen | ||
| Apr 16, 2023 at 16:15 | history | edited | Gripen | CC BY-SA 4.0 |
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| Apr 16, 2023 at 15:54 | history | edited | Gripen | CC BY-SA 4.0 |
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| Apr 16, 2023 at 7:34 | answer | added | sai | timeline score: 2 | |
| Apr 16, 2023 at 6:15 | comment | added | jsotola | @Gripen are you certain the the microcontroller outputs are at 0 V when asleep? ... they may be floating | |
| Apr 16, 2023 at 0:05 | comment | added | user319836 | @Gripen; When the microcontroller is asleep, can a voltage still be maintained on a GPIO output (0 or 3.3V)? | |
| Apr 15, 2023 at 22:02 | comment | added | Tim Williams | @Gripen PMOS and NMOS are available in a plethora of ratings, from the tiniest signals inside ICs themselves, to massive power transistors. There is something suitable for every application. You asked for "0V at the output pin" = display off; simply set 3.3V for off and 0V for on, instead. "Deassert" = set high-Z / undriven; if this is still confusing, perhaps you can show your schematic and source code, and we can show how to modify them? | |
| Apr 15, 2023 at 21:59 | comment | added | Tim Williams | @SamGibson In this case, I'm at least partially answering the question to introduce the OP to additional information they likely weren't aware of (which is now confirmed). Once an answer is clear, I compose it (or someone else can "snipe" it, which, heck, saves me the trouble). This method avoids pitfalls like X-Y problems, that so frequently show up. (Or is it preferable to submit answers early and often, regardless of quality of question or answer?) | |
| Apr 15, 2023 at 19:50 | comment | added | SamGibson♦ | @TimWilliams - Hi, I appreciate you're trying to help but please try to avoid answering questions in comments - that is not an allowed use of comments (see here and here). Using comments in this way can discourage others from actually answering, as the OP already has their "answer" in the comment so the time spent on writing a real answer can be seen as a waste. Comments also can't be edited or downvoted, so they bypass the full quality control and updating that is possible with real answers. Thanks. | |
| Apr 15, 2023 at 19:40 | comment | added | Gripen | @TimWilliams Isn't P MOSFET used for more high current applications? How would I invert the command state. And what do you mean with deassert bus signals? | |
| Apr 15, 2023 at 19:35 | history | edited | Marcus Müller | CC BY-SA 4.0 |
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| Apr 15, 2023 at 19:35 | comment | added | Tim Williams | Easiest solution: use a P-CH MOSFET and invert the command state (low = on). Remember to deassert or set low all the bus signals, so the display isn't powered through input clamp diodes. | |
| Apr 15, 2023 at 19:23 | history | asked | Gripen | CC BY-SA 4.0 |