2015-06-05 00:08 hmm. another one goes up on smoke. seems that some current-limiting may be beneficial :) 2015-06-05 00:25 well, another FET could detect if Vout < ~0.7 V and trigger an interrupt. or directly cut power 2015-06-05 00:27 and a 1 Ohm series could further limit inrush current. just in case 2015-06-05 00:36 pcercuei has quit [Ping timeout: 255 seconds] 2015-06-05 02:17 atommann has joined #qi-hardware 2015-06-05 02:35 atommann has quit [Ping timeout: 255 seconds] 2015-06-05 03:01 whitequark: also tried a load step from ~100 Ohm to ~18 Ohm (at 1.8 V). i can't see any voltage change. not sure if this is good or bad ;-) 2015-06-05 03:02 at least the FET, 3rd in this role, didn't go up in smoke :) 2015-06-05 03:21 atommann has joined #qi-hardware 2015-06-05 03:29 rjeffries_ has joined #qi-hardware 2015-06-05 03:54 rjeffries_ has quit [Remote host closed the connection] 2015-06-05 04:26 archang has quit [Quit: Konversation terminated!] 2015-06-05 04:27 archang has joined #qi-hardware 2015-06-05 05:40 archang has quit [Ping timeout: 245 seconds] 2015-06-05 05:41 archang has joined #qi-hardware 2015-06-05 05:44 atommann has quit [Ping timeout: 255 seconds] 2015-06-05 06:33 huhß life in here? 2015-06-05 06:35 ( i wonder if this simple adjustable regulator could actually work) it would, but pretty poor efficiency 2015-06-05 06:38 archang has quit [Ping timeout: 265 seconds] 2015-06-05 06:40 so it's OK for very low loads (except you'd still want a dedicated series resistor in line with D-S of FET), but for real supply it burns exactly same amount of energy like a linear regulator 2015-06-05 06:41 while introducing nasty noise 2015-06-05 06:43 actually it doesn't introduce any noise when that's an opamp and not a comparator (with hysteresis), since then your FET does work in linear range and not switched like you implied 2015-06-05 06:44 you should add some small buffer capacitor on output of opamp, to avoid it starting oscillation 2015-06-05 06:47 the problem with your design though seems that you want to use a *comparator* in a MCU 2015-06-05 06:47 this won't fly 2015-06-05 06:48 unless you intentionally design in some RC elements that determine the oscilation frequency 2015-06-05 06:49 your design best case is using the output buffer C and the assumed Ron of FET as such determining values, and that means you _will_ get wild oscillation at least in the magnitude of comparator's hysteresis 2015-06-05 06:50 oooh, and of cours Rload for discharge of the buffer C 2015-06-05 06:51 in theory the circuit works. In practice it's a nasty critter hard to tame and get stable 2015-06-05 06:53 wej has quit [Ping timeout: 248 seconds] 2015-06-05 06:53 wpwrak: you probbaly should add a R-C lowpass/integrator after the comparator output and drive the FET gate from that integrated analog voltage 2015-06-05 06:54 that might actually work and result in a semi-usable and semi-stable output voltage 2015-06-05 06:57 wej has joined #qi-hardware 2015-06-05 06:59 hi DocScrutinizer05 :-) 2015-06-05 07:32 hi! 2015-06-05 07:55 archang has joined #qi-hardware 2015-06-05 08:39 unclouded has quit [Ping timeout: 256 seconds] 2015-06-05 09:30 archang has quit [Read error: Connection reset by peer] 2015-06-05 10:35 fengling has quit [Quit: WeeChat 1.1.1] 2015-06-05 10:35 unclouded has joined #qi-hardware 2015-06-05 11:21 (RC) naw, that would defeat the idea of operating in switched mode. what i want is to minimize the power burnt in the FET, so i want it either all on or all off 2015-06-05 11:23 so far, the critter seems to work suspiciously well, but with a slight tendency of regulating too high with fast settings 2015-06-05 11:24 what is a little odd is that it drives the FET with bursts of pulses. so yes, there's more noise than strictly necessary 2015-06-05 12:04 jekhor has joined #qi-hardware 2015-06-05 12:21 pcercuei has joined #qi-hardware 2015-06-05 12:46 jekhor_ has joined #qi-hardware 2015-06-05 12:50 jekhor has quit [Ping timeout: 252 seconds] 2015-06-05 13:16 jekhor has joined #qi-hardware 2015-06-05 13:19 jekhor_ has quit [Ping timeout: 250 seconds] 2015-06-05 13:39 wej has quit [Ping timeout: 246 seconds] 2015-06-05 13:46 wej has joined #qi-hardware 2015-06-05 14:02 jekhor_ has joined #qi-hardware 2015-06-05 14:05 jekhor has quit [Ping timeout: 252 seconds] 2015-06-05 14:15 rjeffries has quit [Ping timeout: 252 seconds] 2015-06-05 14:34 jekhor__ has joined #qi-hardware 2015-06-05 14:37 jekhor_ has quit [Ping timeout: 258 seconds] 2015-06-05 15:11 pcercuei has quit [Ping timeout: 250 seconds] 2015-06-05 15:13 in germany it's hotter than in buenos aires 2015-06-05 15:37 nicksydney has joined #qi-hardware 2015-06-05 15:42 rjeffries has joined #qi-hardware 2015-06-05 15:50 jekhor_ has joined #qi-hardware 2015-06-05 15:53 jekhor__ has quit [Ping timeout: 246 seconds] 2015-06-05 16:03 jekhor__ has joined #qi-hardware 2015-06-05 16:07 jekhor_ has quit [Ping timeout: 276 seconds] 2015-06-05 16:14 only 27degree C in the office... 2015-06-05 16:14 eintopf: winter here ... 2015-06-05 16:23 jekhor__ has quit [Ping timeout: 265 seconds] 2015-06-05 16:41 so much about the $9 PC: https://olimex.wordpress.com/2015/06/05/how-to-get-in-the-news-tell-people-that-you-will-make-and-sell-something-which-cost-you-20-for-9/ 2015-06-05 16:47 rejon has joined #qi-hardware 2015-06-05 18:12 roh: CCC? 2015-06-05 18:12 BER? 2015-06-05 18:15 ??? 2015-06-05 18:18 https://events.ccc.de/camp/2015/wiki/Village:BER 2015-06-05 18:19 by: http://www.raumfahrtagentur.org/ 2015-06-05 18:21 Just wondered if you'll be there 2015-06-05 18:29 pcercuei has joined #qi-hardware 2015-06-05 18:47 rjeffries has quit [Ping timeout: 256 seconds] 2015-06-05 18:51 pcercuei has quit [Ping timeout: 244 seconds] 2015-06-05 19:04 DocScrutinizer05: sure 2015-06-05 19:04 no clue about details yet 2015-06-05 19:06 me neither 2015-06-05 19:06 but I might want a "village" with a tad of advertising for Neo900 2015-06-05 19:07 if anybody gets the point about that project, then the CCC visitors 2015-06-05 19:15 hehe... so the project is still on track? 2015-06-05 19:16 jekhor__ has joined #qi-hardware 2015-06-05 19:24 pcercuei has joined #qi-hardware 2015-06-05 19:27 mhh, the camp 2015-06-05 19:35 roh: well, sort of, yes 2015-06-05 19:36 more and more organizational crap getting in the way though, time sinks everywhere. Webshop, PayPal, markiting and PR and whatnot 2015-06-05 19:37 DocScrutinizer05: you are from russia moscow? 2015-06-05 19:37 and wants to tracel to the camp? 2015-06-05 19:37 hmm, why? 2015-06-05 19:37 I had something like that in my mind :/ 2015-06-05 19:37 nah, never seen Russia 2015-06-05 19:38 ~weather eddn 2015-06-05 19:38 Nuernberg, Germany; (EDDN) 49-30N 011-03E 318M; last updated: 2015.06.05 1920 UTC; Dew Point: 50 F (10 C); Pressure (altimeter): 30.09 in. Hg (1019 hPa); Relative Humidity: 38%; Temperature: 77 F (25 C); Visibility: greater than 7 mile(s); Wind: from the E (090 degrees) at 5 MPH (4 KT) 2015-06-05 19:43 oh yes 2015-06-05 19:48 jekhor__ has quit [Ping timeout: 255 seconds] 2015-06-05 20:09 pcercuei has quit [Ping timeout: 246 seconds] 2015-06-05 21:02 pcercuei has joined #qi-hardware 2015-06-05 21:11 rjeffries has joined #qi-hardware 2015-06-05 21:18 wej has quit [Ping timeout: 248 seconds] 2015-06-05 21:22 wej has joined #qi-hardware 2015-06-05 21:27 wej has quit [Ping timeout: 246 seconds] 2015-06-05 21:35 infobot has quit [Ping timeout: 256 seconds] 2015-06-05 21:35 wej has joined #qi-hardware 2015-06-05 22:59 ~weather chc 2015-06-05 22:59 :~( not working for me 2015-06-05 23:56 infobot has joined #qi-hardware 2015-06-05 23:57 Haswell has joined #qi-hardware