Activity for Pete W
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Edit | Post #280900 |
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| Edit | Post #280900 |
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| Edit | Post #280900 |
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| Edit | Post #280900 |
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| Edit | Post #280900 |
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| Edit | Post #280900 |
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| Edit | Post #280900 |
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| Edit | Post #280900 |
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| Edit | Post #280900 |
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| Edit | Post #280900 |
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| Edit | Post #280900 |
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| Edit | Post #280900 |
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| Edit | Post #280900 |
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| Edit | Post #280900 |
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| Edit | Post #280900 |
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| Edit | Post #280900 |
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| Edit | Post #280900 |
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| Edit | Post #280900 |
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| Edit | Post #280900 |
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| Edit | Post #280900 |
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| Edit | Post #280900 |
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| Edit | Post #280900 | Initial revision | — | almost 4 years ago |
| Answer | — |
A: Isolated Digital Input - Overvoltage protection UPDATED. based on clarification to original question. To be clear, just an idea, not tested for this situation! It is abusing the VIL margin on the 3.3V CMOS input, so series diode should be schottky... foo4 (more) |
— | almost 4 years ago |
| Comment | Post #280822 |
did you look at the linked video? It looked pretty wild, moving down the line! (more) |
— | almost 4 years ago |
| Edit | Post #280819 | Initial revision | — | almost 4 years ago |
| Question | — |
What is causing this massive discharge traveling down a power line? []()What is causing [this [ABC-news video via Twitter]](https://twitter.com/ABC/status/1361393756067487744?refsrc=twsrc%5Etfw%7Ctwcamp%5Etweetembed%7Ctwterm%5E1361393756067487744%7Ctwgr%5E%7Ctwcon%5Es1&refurl=https%3A%2F%2Fwww.nakedcapitalism.com%2F2021%2F02%2F200pm-water-cooler-2-16-2021.html) spect... (more) |
— | almost 4 years ago |
| Comment | Post #280672 |
Could it be a damping resistor, to reduce ringing on the output of the driver? (more) |
— | almost 4 years ago |
| Comment | Post #280614 |
Thanks. Spent a couple hours playing with it, hard to tell the difference between 2- and 3-transistor circuits, with the parts and equipment here. On solder-proto-board with 2n3904's, a tightly packed 3-transistor setup switched on in <25ns and switched off in <20ns, which was better than I expected.... (more) |
— | almost 4 years ago |
| Comment | Post #280600 |
@Andy aka -- yes, you are right. It's something I have been avoiding. Thanks for the push to get me there. (more) |
— | almost 4 years ago |
| Edit | Post #280600 |
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| Edit | Post #280600 |
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| Edit | Post #280600 |
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| Edit | Post #280600 |
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| Edit | Post #280600 |
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| Edit | Post #280600 |
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| Comment | Post #280600 |
@Olin, sorry for not being more clear. Edited to hopefully clarify what I'm asking. I didn't mean that it is an intentionally controlled ramp, rather that the output (i.e. collector current sunk from the node at the top of the cap) takes measurable time to go from 0 to the value that it will have. I ... (more) |
— | almost 4 years ago |
| Edit | Post #280600 |
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| Edit | Post #280594 |
Post edited: made the pic a hyperlink to full size of itself |
— | almost 4 years ago |
| Suggested Edit | Post #280594 |
Suggested edit: made the pic a hyperlink to full size of itself (more) |
helpful | almost 4 years ago |
| Edit | Post #280600 |
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| Edit | Post #280600 |
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| Edit | Post #280600 |
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| Edit | Post #280600 |
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| Edit | Post #280600 |
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| Edit | Post #280600 |
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| Edit | Post #280600 |
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| Edit | Post #280600 |
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| Edit | Post #280600 |
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| Edit | Post #280600 | Initial revision | — | almost 4 years ago |
| Question | — |
Is a BJT 3-transistor Wilson mirror faster than a simple mirror? My question is trying to understand if there is an effect on the switching time, on both turn-on and turn-off, between the following configurations. A mirror set up to switch a current, and there is switching on the input side of the mirror input (for other reasons), meaning the simple mirror's ba... (more) |
— | almost 4 years ago |
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