| 08:34.25 | *** join/##electronics infobot (ibot@96-86-209-99-static.hfc.comcastbusiness.net) |
| 08:34.25 | *** topic/##electronics is http://electronicschat.org | Introductory electronics eBook: http://www.ibiblio.org/kuphaldt/electricCircuits/ | Battery information: http://batteryuniversity.com/ | Soldering: http://tinyurl.com/y8p8lfp9 | RIP n2, you will be missed, but not forgotten https://electro.david.promo/the-last-goodbye |
| 08:34.33 | absurdist | bayesian? |
| 08:34.35 | DocScrutinizer05 | ~xy |
| 08:34.35 | infobot | hmm... xy is The XY problem: You want to do X, but don't know how. You think you can solve it using Y, but don't know how to do that, either. You ask about Y, which is a strange thing to want to do. Just ask about X. http://www.catb.org/~esr/faqs/smart-questions.html#goal |
| 08:35.27 | corecode | absurdist: do you want to learn how to build a voltage inverter, or do you just want to get it done? |
| 08:35.44 | absurdist | yeah maybe two diodes and a few caps |
| 08:36.16 | synx508 | absurdist, yes, you can use a NE555, then an adjustable -ve regulator. Or if you're smart, some sort of reference and a comparator to tweak the 555's duty cycle |
| 08:36.32 | synx508 | and a diode pump too obv |
| 08:37.14 | *** join/##electronics XOPK (~OPK@unaffiliated/opk) |
| 08:37.57 | absurdist | two resistors 4 caps 2 diodes OK |
| 08:38.33 | synx508 | probably not enough parts to do it stabilised, but enough to get a negative voltage |
| 08:39.22 | DocScrutinizer05 | or you get an inverting SEPIC converter |
| 08:39.31 | DocScrutinizer05 | or buck |
| 08:39.45 | DocScrutinizer05 | module |
| 08:39.49 | puddingpimp | I usually just plop a umodule |
| 08:39.49 | absurdist | they are noisy |
| 08:40.13 | puddingpimp | can worry about designing a cheaper solution after the prototype is proven |
| 08:41.06 | synx508 | haha, NE555s are noisier |
| 08:43.04 | synx508 | I used a diode/cap voltage inverter of the unused outputs on a binary counter to get -ve for a comparator not so long ago, which felt very wrong |
| 08:43.17 | *** join/##electronics basuotoko (~basuotoko@118.118.204.88) |
| 08:43.45 | synx508 | need more tea. sentence construction fail. |
| 08:43.56 | absurdist | well i think the capacitors in this old circuit regulating the negative voltage are rotten. the voltage jumps up and down, maybe a zener diode seen the eternal hunting grounds. |
| 08:44.42 | Loetmichel | sounds more like some caps gone "blind" |
| 08:46.17 | absurdist | have to replace electrolytics anyway, it sucks, i hope the board isnt' damaged |
| 08:47.49 | synx508 | could it be that the load is causing the voltage to change or have you tested without a load? |
| 08:49.59 | DocScrutinizer05 | gillesmauve: see "Move cursor..." commands in http://ascii-table.com/ansi-escape-sequences-vt-100.php |
| 08:51.10 | DocScrutinizer05 | keep in mind to explicitly clear all printing positions by printing either a new char or a space to each |
| 08:55.07 | absurdist | synx508, it is a known problem of this board |
| 08:55.25 | absurdist | synx508, alc voltage fluctuating and other weird shit |
| 08:55.42 | DocScrutinizer05 | you got a schematics? |
| 08:57.07 | *** join/##electronics hussam (uid193284@gateway/web/irccloud.com/x-avdscefqugjjsvqo) |
| 09:02.10 | ketas | can't the sdr hardware measure signals outside it's range? |
| 09:02.12 | linux_probe | where's the beef |
| 09:02.59 | ketas | i have vague understanding it gets interference at least |
| 09:03.23 | corecode | its* |
| 09:03.42 | NorKle | mmm brains! |
| 09:04.56 | ketas | corecode: indeed |
| 09:05.14 | NorKle | :P~ |
| 09:05.21 | ketas | but most of its is it's hence the bug i guess |
| 09:06.17 | ketas | i wonder where the star correction came from? |
| 09:06.32 | corecode | from outer space |
| 09:08.22 | *** join/##electronics godSend23 (~sjWiz@c-98-248-70-221.hsd1.ca.comcast.net) |
| 09:08.25 | godSend23 | hey all |
| 09:08.54 | ketas | fun: https://www.reddit.com/r/answers/comments/8etlfx/when_did_start_being_used_to_denote_correct/ |
| 09:10.13 | ketas | or maybe http://leoxicon.blogspot.com/2017/09/asterisk-correcting-typos.html?m=1 |
| 09:10.27 | godSend23 | heh |
| 09:10.51 | corecode | old irc thing |
| 09:13.05 | jancoow | Hi. I'm having a lot of interference when powering on my 500mw 433mhz module. There was a bit of inference when I set it to 10mw first (but didn't really know this was causing it). When I set the power to 100mw, it was way worse |
| 09:13.14 | jancoow | aliexpress.com/item/32989009928.html I was wondering if something like this would help |
| 09:13.44 | corecode | can you post a proper link? |
| 09:13.55 | jancoow | https://aliexpress.com/item/32989009928.html |
| 09:14.10 | ketas | corecode: yet so confusing |
| 09:14.17 | DocScrutinizer05 | ~part |
| 09:14.42 | *** part/##electronics infobot (ibot@96-86-209-99-static.hfc.comcastbusiness.net) |