Timeline for "Sharp" transistor switching / minimizing fading effect
Current License: CC BY-SA 4.0
14 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 22, 2022 at 5:45 | comment | added | MicroservicesOnDDD | @jonk -- I liked that you added the optoisolator. Nice. | |
| Feb 22, 2022 at 5:23 | answer | added | Kuba hasn't forgotten Monica | timeline score: 1 | |
| Feb 22, 2022 at 5:08 | comment | added | jonk | @MicroservicesOnDDD I forgot to point out that the 6N137 isn't needed. You can just use an LED there. In fact, that's how I did it originally. Just wanted a pulsing LED. The 6N137 there is for opto-isolation, in case that's wanted. | |
| Feb 22, 2022 at 2:55 | answer | added | MicroservicesOnDDD | timeline score: 0 | |
| Feb 21, 2022 at 21:42 | comment | added | jonk | @MicroservicesOnDDD You can read about the idea here. (Though I think R7 was a trial idea that I don't think makes much sense and I'd likely just short it out, now.) Depending on your need, I'd redesign the positive feedback and the other resistor values, though. | |
| Feb 21, 2022 at 21:13 | comment | added | MicroservicesOnDDD | @jonk - Would you be okay to share your circuit? If I make a question tailored for your answer? | |
| Jan 28, 2022 at 15:00 | history | tweeted | twitter.com/StackElectronix/status/1487078039334830083 | ||
| Dec 23, 2021 at 18:38 | comment | added | jonk | theerrormagnet, What I do is use a BJT circuit to make a relaxation oscillator. The rate of flashing an LED tells me the voltage. It's quite useful. | |
| Dec 23, 2021 at 15:38 | history | edited | JRE | CC BY-SA 4.0 |
deleted 62 characters in body; edited title
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| Dec 23, 2021 at 15:36 | answer | added | jp314 | timeline score: 1 | |
| Dec 23, 2021 at 13:21 | vote | accept | theerrormagnet | ||
| Dec 23, 2021 at 12:01 | comment | added | tobalt | For sharper switching your need higher open loop gain than a single transistor. Comparators and op amps would be such options, but it depends what else are requirements. | |
| Dec 23, 2021 at 11:12 | answer | added | Andy aka | timeline score: 2 | |
| Dec 23, 2021 at 11:02 | history | asked | theerrormagnet | CC BY-SA 4.0 |