Timeline for How can I use a PNP transistor as a switch in a 555 bistable circuit?
Current License: CC BY-SA 4.0
9 events
| when toggle format | what | by | license | comment | |
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| Apr 16, 2023 at 20:11 | comment | added | Edin Fifić | @Hearth You're right. It was one of the details I have learned years ago but forgot. | |
| Apr 16, 2023 at 10:57 | history | edited | Edin Fifić | CC BY-SA 4.0 |
improved the answer
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| Apr 16, 2023 at 5:08 | history | edited | Edin Fifić | CC BY-SA 4.0 |
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| Apr 15, 2023 at 18:42 | vote | accept | RickyBoy | ||
| Apr 15, 2023 at 18:42 | comment | added | RickyBoy | Supply voltage was not the problem so I am assuming (given another answer put forward) that your first suggestion is the explanation. Thank you. Back in business. | |
| Apr 15, 2023 at 15:04 | comment | added | Hearth | With the collector and emitter swapped, the transistor can still function just fine in reverse-active mode, with a much reduced gain. There are occasionally reasons to use a BJT in reverse active, but they're not very common--it's more likely a mistake, in the case of the schematic in the question. | |
| Apr 15, 2023 at 12:30 | history | edited | Edin Fifić | CC BY-SA 4.0 |
added 4 characters in body
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| Apr 15, 2023 at 12:24 | comment | added | RickyBoy | I can confirm the transistor is connected as in the schematic. I will check the supply voltage. Otherwise I will just work on the standard config of the PNP. Thanks for answer. | |
| Apr 15, 2023 at 12:15 | history | answered | Edin Fifić | CC BY-SA 4.0 |