#avr Logs
May 20 2019
#avr Calendar
06:19 AM polprog: rue_mohr: https://ibb.co/x7HvC6Y
06:23 AM polprog: rue_mohr: https://ibb.co/JdCRFmb
07:31 AM polprog: rue_bed: what do you think about this? https://i.ibb.co/mv6KNtM/filamentsupply.png
07:45 AM cehteh: whats that gonna do?
10:23 AM gsi__ is now known as gsi_
12:21 PM rue_mohr: pol
12:21 PM rue_mohr: you should have AC on the filament
12:22 PM rue_mohr: yay manual tho!
12:22 PM rue_mohr: polprog, DC seems to usually cause uneven illumination
12:26 PM rue_mohr: but also the filament should be at 5V +- the filament voltage
12:26 PM rue_mohr: you do not want one end of the filament at ground
12:26 PM polprog: yeah i was told that in another channel
12:26 PM rue_mohr: so
12:26 PM polprog: im working on a 2vdc supply
12:26 PM rue_mohr: got an OLD computer power supply we can part out?
12:26 PM rue_mohr: cause, for like 6 parts in it, we can make up one
12:26 PM polprog: yes, and i already gutted it took some filters chokes etc
12:27 PM polprog: trafos
12:27 PM rue_mohr: no non o
12:27 PM rue_mohr: does it have two driver transistors?
12:27 PM polprog: i think so
12:27 PM polprog: yes
12:27 PM rue_mohr: like a matched pair
12:27 PM rue_mohr: ok, you want those
12:27 PM rue_mohr: are there 2 or 3 transformers in it?
12:27 PM polprog: they are hard to reach, ill desolder them as soon as the thunderstorm is over
12:27 PM polprog: i already got three trafos
12:28 PM polprog: one on a ferrite ring
12:28 PM polprog: two in yellow tape
12:28 PM rue_mohr: ok, ONE of them is the transistor drive transformer, do you know which one that is?
12:28 PM polprog: the small one? i can trace the traces
12:28 PM rue_mohr: its one o the small ones
12:28 PM rue_mohr: take me a pic of the small ones
12:28 PM polprog: sec
12:29 PM rue_mohr: there is a give-away cause it has the overcurrent drive on it
12:32 PM rue_mohr: bastard me I did a video and didn't take photos
12:32 PM polprog: https://i.ibb.co/1ZbPBwY/IMG-20190520-192744.jpg
12:32 PM polprog: the right one
12:32 PM rue_mohr: middle one
12:33 PM rue_mohr: the right one is the power trnsofrmer, thats not helpfull
12:33 PM polprog: the right its connected directly to a pair of power transistors
12:33 PM rue_mohr: the left one isnt' a transformer, its a linked inductor ;)
12:33 PM polprog: but it looks like it can function as a trafo
12:33 PM rue_mohr: polprog, yes, turns out I used the small transistors anyhow
12:33 PM rue_mohr: the middle one was linked to two smaller transistors to-92
12:34 PM polprog: https://i.ibb.co/CmXc7NC/IMG-20190520-192941.jpg
12:34 PM rue_mohr: you need those and two 220 ohm resistors
12:34 PM polprog: two smaller trannies are on the left, the small one was on the right
12:34 PM polprog: 220 you say
12:35 PM rue_mohr: no, those are diodes
12:35 PM rue_mohr: look for two to-92, I think their on the sub-board
12:35 PM polprog: there are two identical to92 on the left on the big heatsink
12:35 PM rue_mohr: not to-220
12:36 PM rue_mohr: to-92
12:36 PM polprog: ahh
12:36 PM rue_mohr: hey, maybe this one is mosfet based...
12:37 PM rue_mohr: whats the part number on those big ones?
12:37 PM polprog: stps30 schottky rectifier
12:38 PM rue_mohr: oh hahah
12:38 PM rue_mohr: the picture is facing the wrong way
12:38 PM polprog: L7912 negitiv vtg reg
12:38 PM rue_mohr: yea, that makes more sense
12:38 PM rue_mohr: were on the wrong heatsink
12:38 PM rue_mohr: whats on the smaller heatsink
12:39 PM polprog: a 1h0165 and ssh7n90
12:39 PM rue_mohr: oh, not matched
12:39 PM rue_mohr: I think this is a forward converter and not a pushpull
12:39 PM polprog: whatever it was its ded
12:39 PM rue_mohr: ok
12:40 PM rue_mohr: was it under 250W?
12:40 PM polprog: so i opened it up for the trafos
12:40 PM polprog: and im taking the 7912 as well
12:41 PM rue_mohr: so, the part I'm after is the driver transistor for a pushpull bipolar drive
12:41 PM rue_mohr: because the drive voltages for the bipolar power transistor pair are abotu the same as the vfd filament
12:41 PM rue_mohr: I'm trying to collect images
12:41 PM rue_mohr: I didn't take a lot
12:41 PM rue_mohr: I can rebuild it
12:42 PM rue_mohr: yes, yours is mosfet based
12:42 PM rue_mohr: that doesn't help for this direction
12:42 PM rue_mohr: the 7N90 is the main power fet
12:43 PM rue_mohr: haha and the 0165 is an offline power supply controller
12:43 PM polprog: ahh right it has 4 legs
12:44 PM rue_mohr: damn
12:44 PM rue_mohr: can you find another one?
12:44 PM polprog: dont worry
12:44 PM polprog: ill get another one in a sec
12:44 PM rue_mohr: but see the green inductor?
12:44 PM polprog: ye
12:44 PM rue_mohr: yea, thats your 12->24V
12:44 PM rue_mohr: or the yellow one
12:45 PM polprog: or 5 -> 2.5
12:45 PM rue_mohr: whichever
12:45 PM rue_mohr: no I mean for the main drive votlage
12:45 PM polprog: yeah im planning to remove them as well
12:45 PM polprog: there are two so ill figure something out
12:45 PM rue_mohr: for the 12V doubler, you want that green (or yellow) inductor, and a bit of other stuff, namely a 74hc14
12:46 PM rue_mohr: one of those double diode modules dosn't hurt either
12:46 PM rue_mohr: (the to-220)
12:46 PM polprog: sec, switching to pc
12:46 PM rue_mohr: the 0165 wont startup till its atleast got 15V, so its not helpfull for a controller for this
12:50 PM polprog: thisone is dusty
12:50 PM polprog: lemme blow it
12:54 PM polprog: no matched pairs, buz77 and i cant tell the oher one
12:55 PM polprog: its got a tiny trafo tho
12:59 PM rue_mohr: thats ok
01:00 PM rue_mohr: this all sounds good
01:00 PM polprog: oh hey
01:00 PM polprog: a centre tapped one
01:01 PM rue_mohr: you want the driver transformer for the buz77
01:02 PM polprog: looks like its ther one im taking out
01:02 PM rue_mohr: picture.....
01:04 PM polprog: https://i.ibb.co/9H8gbM6/IMG-20190520-195854.jpg
01:04 PM rue_mohr: hah no
01:04 PM rue_mohr: drat
01:04 PM rue_mohr: its another forward cnoverter, how...
01:05 PM rue_mohr: wait, are there two trasistors driving the large transformer?
01:05 PM rue_mohr: the one you have the screwdriver on is for running the 5vsb
01:05 PM rue_mohr: as is the transformer you have there
01:06 PM polprog: the big one is a diode pair, the small one is f06c280
01:06 PM polprog: no idea,
01:06 PM polprog: ah, marked as D
01:06 PM rue_mohr: the heatsink beside the one you have the screwdriver on
01:06 PM polprog: i ci cant see the markings
01:06 PM polprog: i cant*
01:06 PM polprog: ill take it out
01:06 PM rue_mohr: are there one or two transistors?
01:07 PM polprog: two, this is on the hot side
01:07 PM polprog: there is one for sure
01:08 PM rue_mohr: ok, its the wrong type of supply again :/
01:08 PM rue_mohr: almost all the normal sized at(x) supplies have what we need
01:08 PM rue_mohr: these all look like mini supplies
01:10 PM polprog: shit
01:12 PM polprog: ill have to get some more on sunday
01:12 PM polprog: full size atx you say
01:12 PM rue_mohr: or AT
01:13 PM polprog: i have to get an at anyways
01:13 PM rue_mohr: I'm assembling a dir of stuff
01:13 PM polprog: for the 486 board, it doesnt have the 20 pin connector
01:17 PM rue_mohr: http://ruemohr.org/~ircjunk/tutorials/elex/VFD/p1110728.jpg
01:17 PM rue_mohr: http://ruemohr.org/~ircjunk/tutorials/elex/VFD/p1110729.jpg
01:17 PM rue_mohr: http://ruemohr.org/~ircjunk/tutorials/elex/VFD/p1110731.jpg
01:18 PM rue_mohr: I have to check on what transistors I used
01:18 PM rue_mohr: it might just be 2N2222
01:18 PM rue_mohr: that transformer I'm using, is driven by two transistors that will do anyhow
01:19 PM polprog: ok, im trying to measure out those trasnformers i have out
01:19 PM polprog: if they are any use at all
01:20 PM rue_mohr: they are 200VDC to 5VDC
01:21 PM polprog: ive got one that has .33R on one pair and .13R on the other
01:21 PM polprog: looks like 3:1 more less
01:21 PM polprog: ill experiment wit this one, it fits on the breadboard
01:28 PM rue_mohr: do you have a 74hc14?
01:28 PM polprog: hmm i might not have at hand
01:28 PM polprog: i do
01:29 PM rue_mohr: ok
01:29 PM polprog: hmm thats what i was lookin for earlier
01:30 PM rue_mohr: for the 12V ->24V we also need two diodes, a cap, and two driver transistors
01:30 PM polprog: sec, i need to test one thing
01:30 PM rue_mohr: if you ahve any irfz44 kicking around that would be cool
01:30 PM polprog: irf44?
01:31 PM rue_mohr: its a common driver mosfet
01:31 PM rue_mohr: what to-92 transistor do you have pairs of?
01:32 PM polprog: ive several identical Pmosfets
01:32 PM polprog: i have an irf44 like nmos, p55nf06, but one
01:32 PM polprog: ill check
01:32 PM polprog: i only have SMD nmosfets that i can pair
01:33 PM rue_mohr: heh
01:43 PM rue_mohr: http://ruemohr.org/~ircjunk/tutorials/elex/smps/dscn5159.jpg
01:44 PM rue_mohr: arg, there should be all the info on that
01:44 PM rue_mohr: drat, I'll have to come back to this
01:45 PM polprog: lol, looks like this transformer is not suited for such small frequency i have
01:45 PM polprog: i have abiyt 20 odd khz
01:45 PM polprog: about
01:46 PM polprog: the mosfet might be too resistive
01:46 PM polprog: yeah thats it
01:46 PM polprog: the winding is .1 ohm, the mosfters rdson is killing it
01:47 PM polprog: lemme try the 74hc14
01:47 PM rue_mohr: its just an osc
01:47 PM polprog: i have a relaxation osc
01:47 PM polprog: 20khz
01:47 PM rue_mohr: the 74hc14 is just meant to drive two transistors and pushpull the
01:47 PM polprog: ah
01:47 PM polprog: hmm
01:48 PM rue_mohr: this IS NOT A GOOD DIAGRAM
01:48 PM rue_mohr: http://ruemohr.org/~ircjunk/tutorials/elex/smps/dcdc.html
01:48 PM rue_mohr: only the stuff for v2 is used, and not L5
01:48 PM rue_mohr: and we dont use irc510
01:49 PM rue_mohr: no wiat its v2
01:49 PM rue_mohr: look I need hours to put togethor diagrams
01:49 PM rue_mohr: and I need to catch up on a few other things
01:49 PM rue_mohr: :/
01:49 PM rue_mohr: that filter inductor can double votlage when set up as a center tapped pushpull transformer
01:49 PM rue_mohr: its super easy
01:50 PM rue_mohr: I'll find the schematics later
01:50 PM rue_mohr: I have them all, just not phtographed
01:55 PM rue_shop1: its junny tho, if we could tap that filter inductor, we could use the resulting AC for the filament
01:55 PM rue_shop1: huh
01:58 PM polprog: ive got a big inductir with a centre tap on the biggest range
01:58 PM polprog: s/inductir/transformer/
01:58 PM polprog: small tansforemer
01:58 PM polprog: gimme a sec, i need a diode
01:58 PM polprog: and a cap
02:00 PM rue_shop1: its can be smaller than the one in the image
02:00 PM polprog: ivw got about 20 vpp on the output, in ringing type thing
02:00 PM rue_shop1: the one inteh pciture I use for driving relays
02:00 PM rue_shop1: I'd love to show you what I did
02:00 PM rue_shop1: cant right now
02:01 PM polprog: my scope keeps effing triggering at idle, its distracting me
02:02 PM McDonaldsWiFi: there a half way accurate way of telling how long a function takes without an oscope?
02:02 PM rue_shop1: no
02:02 PM McDonaldsWiFi: :(
02:02 PM rue_shop1: but you can use a logic capture thing or one of those
02:02 PM rue_shop1: digital scope kits
02:02 PM polprog: :OOO
02:02 PM polprog: the cap is charging up!!!!
02:02 PM polprog: yay
02:04 PM rue_shop1: heh, the freq meter, with no input is picking up 60.0Hz, well done
02:05 PM polprog: i think you need to calibrate yours, mine is picking up 50Hz ;^)
02:06 PM rue_shop1: heh
02:09 PM polprog: yay
02:09 PM polprog: im upt to 8V on the output unloaded
02:09 PM polprog: 8.5!
02:09 PM polprog: 9!
02:09 PM polprog: with just a little more frequency
02:09 PM polprog: 9.5
02:09 PM polprog: 9,6
02:09 PM polprog: 9.7
02:10 PM polprog: 2.2 with 51k load
02:11 PM polprog: 26khz
02:13 PM rue_shop1: yea, I can helpp you make a proper one
02:13 PM rue_shop1: tell me what driver transistors you ahve that are matched
02:13 PM rue_shop1: and I dont care if you have to solder pins on surface mount ones
02:15 PM polprog: lemme check
02:15 PM rue_shop1: going thru the 2" pile of paper now
02:15 PM polprog: nmosfets?
02:15 PM polprog: or any mosfets?
02:20 PM rue_shop1: does not matter
02:20 PM rue_shop1: N tho, either npn or N channel
02:20 PM rue_shop1: I'm avoiding the flyback converter I designed
02:22 PM polprog: npn, BD437, nmos, p55nf06 from the same lot
02:22 PM polprog: 3 pcs
02:22 PM polprog: and one from a different lot
02:27 PM rue_shop1: can you breadboard the BD437
02:28 PM polprog: yes, and the other ones too
02:30 PM polprog: heyyy, im at 16v idle and 5 under load
02:30 PM polprog: i made the hc14 drive the transformer with two if its ouputs
02:36 PM rue_shop1: no
02:36 PM rue_shop1: the 14 shoudl never drive the transofremr
02:36 PM rue_shop1: thats what the transistost rare for
02:36 PM rue_shop1: does it still work scause we need it
02:37 PM rue_shop1: grab that green inductor
02:37 PM polprog: was planning to put the transistors there, ill do it now
02:38 PM polprog: green inductor, gimme a sec
02:38 PM rue_shop1: ok, the transistor is a gain of about 130, so ok
02:38 PM rue_shop1: I went thrui the whole 2" pile of appar and te dieagram I'm looking for isn't ehre
02:39 PM polprog: in the meantime the ca cahrged up to 21 v, and sprked when i discahrged it
02:39 PM polprog: i know what you wanna do
02:41 PM rue_shop1: I wna tot find the schametic for the thing tha towrks but I ahve another idea
02:41 PM rue_shop1: I NERERD to be working on soemthing else
02:41 PM rue_shop1: but I want ot get you going
02:41 PM polprog: just tell me what is the name of the circuit and ill reasearch on my own
02:42 PM rue_shop1: no name
02:42 PM rue_shop1: hard to find unless you already know if
02:42 PM rue_shop1: wtf where did my noyes no
02:43 PM polprog: the hct drives the transistors
02:43 PM polprog: that drive the trafo in waht configureation>
02:43 PM polprog: source follower?
02:43 PM rue_shop1: ok I have an idea
02:43 PM rue_shop1: no no
02:43 PM rue_shop1: its not
02:43 PM rue_shop1: just a min
02:43 PM rue_shop1: try this carefully
02:43 PM rue_shop1: give me mins
02:43 PM polprog: sec, i need to unsolder the green ind
02:47 PM rue_mohr: this uses resistors to drive the transistors, I'v not doen it before
02:47 PM rue_mohr: so i'm not 100% on this, when I dikd thios I uised the '14 to generate the signal to run the linked inductors
02:48 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1120424.jpg
02:49 PM polprog: hmm i had a different idea
02:49 PM polprog: i have to link the inductors?
02:49 PM rue_mohr: they arel already linked
02:50 PM polprog: no
02:50 PM rue_mohr: thats green thing is a linked inductor
02:50 PM polprog: there are two windings, not linked
02:50 PM polprog: one is 2x the lenght of the other
02:50 PM rue_mohr: its called a linked inductor
02:50 PM rue_mohr: you heed to connecto two of te leads to make it a centertapped coild
02:50 PM rue_mohr: byt whouo nee ot make sure that you connect the riht wtwo wires
02:50 PM polprog: ok, but its gonna be assymetrix
02:51 PM polprog: assymetric
02:51 PM rue_mohr: no, the coils are the same
02:51 PM polprog: one windind is .1ohm and the other is .05
02:51 PM rue_mohr: the green thing has 4 wires
02:51 PM rue_mohr: cause its two inductors
02:51 PM rue_mohr: na teir the same
02:51 PM polprog: ok
02:51 PM rue_mohr: its a fitler, its symmetric
02:51 PM polprog: lemme try
02:51 PM rue_mohr: those resistors shoudl eb 1W
02:52 PM rue_mohr: and I dont know fi 220 ohms is right for 12V, try at 5V first maybe
02:52 PM polprog: ive got some big ones, but im not sure if i have two identical
02:52 PM rue_mohr: current limit if you can
02:52 PM polprog: i wanted to use nmoses though
02:52 PM rue_mohr: use the db4xx
02:52 PM polprog: ill try it
02:52 PM rue_mohr: <rue_shop1> does not matter
02:52 PM rue_mohr: <rue_shop1> N tho, either npn or N channel
02:52 PM rue_mohr: <rue_shop1> I'm avoiding the flyback converter I designed
02:52 PM rue_mohr: <polprog> npn, BD437, nmos, p55nf06 from the same lot
02:52 PM rue_mohr: <polprog> 3 pcs
02:52 PM rue_mohr: <polprog> and one from a different lot
02:52 PM rue_mohr: yse tge db437
02:53 PM rue_shop1: I freaking need better keybaords
02:54 PM polprog: ugh i misread
02:54 PM polprog: i have a pair od bd441, let mecheck
02:54 PM polprog: npn power, ok
02:54 PM rue_shop1: and npn bipolar is fine for that circuit
02:54 PM polprog: okay
02:56 PM rue_shop1: heh, manually polling an ADC conversion
03:00 PM polprog: damn, my power resistors dont fit the breadboard
03:00 PM polprog: i only have a bunch off 47R, all ther est are different value
03:00 PM rue_shop1: from 220 to 1k
03:00 PM rue_shop1: definitly not smaller
03:00 PM polprog: got one 270
03:01 PM rue_shop1: I have to remind myself that this is why I have a 480 square foot shop filled with supplies
03:01 PM polprog: and a 100
03:01 PM rue_shop1: I can do what I want, when I want
03:01 PM polprog: lol
03:06 PM rue_shop1: carefull, if that goes wrong, its a dead short
03:07 PM rue_shop1: maybe show me you connections on the inductor before you power 'er
03:07 PM polprog: ive got a current limited psu
03:07 PM polprog: set to 500ma
03:07 PM rue_shop1: perfect
03:10 PM polprog: its a dead short
03:15 PM rue_shop1: drat
03:15 PM rue_shop1: wait show me your conndtrsions
03:15 PM rue_shop1: you probably did the inductors wrotns
03:15 PM rue_shop1: picture
03:15 PM rue_shop1: of the inductor connectisxons
03:17 PM polprog: i put the inductor in the other board
03:17 PM polprog: i checked everything
03:18 PM rue_shop1: you had to wire the two coils togethor
03:18 PM rue_shop1: if yo ugot the polarity wrong it'll just short
03:18 PM rue_shop1: show me what ya got
03:18 PM rue_shop1: srry I'm trying to finish a project
03:21 PM rue_shop1: ok I'm getting closer
03:22 PM polprog: https://ibb.co/GFYzHBf
03:23 PM rue_shop1: nope
03:23 PM rue_shop1: one of the inductor coils is wired backwards
03:26 PM polprog: heyy, it works
03:26 PM rue_shop1: 8-| oh cool
03:26 PM rue_shop1: what freq is it running at????
03:26 PM rue_shop1: ~4kHz?
03:26 PM rue_shop1: I'v never tried that circuit with one of those
03:27 PM rue_shop1: carefull on temp of those resistors
03:27 PM polprog: they are cooking
03:27 PM polprog: i smell it
03:27 PM polprog: shut it off
03:27 PM polprog: i cant seem to measure the freq
03:28 PM polprog: its wrong
03:28 PM rue_shop1: ? how you sure it was working?
03:28 PM polprog: im getting 12v on the output and no ac on the scope
03:28 PM rue_shop1: uh what you putting in?
03:28 PM polprog: 12v
03:28 PM rue_shop1: hmm
03:29 PM rue_shop1: could mean anything
03:29 PM rue_shop1: if its oscillating you will get 24V
03:29 PM polprog: yes
03:30 PM rue_shop1: ok, let me see what you have now
03:30 PM rue_shop1: the resistor thing may not work
03:30 PM rue_shop1: which means we go to the 7414 osc
03:30 PM polprog: ok, i want the 1714 osc thing anyways
03:31 PM polprog: 7414*
03:31 PM rue_shop1: ok
03:31 PM polprog: i have a couple ideas
03:31 PM rue_shop1: set the 7414 to oscillate at 40Khz
03:31 PM rue_shop1: and run the output of the first stage thru the two adjacent stages so we have buffered, invertted signals
03:32 PM polprog: sec, im tking out the yellow indcutor
03:32 PM rue_shop1: no, the green one is ok...
03:32 PM rue_shop1: tho I think the yellow has more turns, so the freq could be lower
03:32 PM rue_shop1: but 40Khz shoudl be fine for the yellow one
03:32 PM polprog: i need to check how to run the RC on hct14, sec
03:32 PM rue_shop1: pin 1 thru cap to ground
03:32 PM rue_shop1: resistor from 1 to 2
03:32 PM rue_shop1: then jump 2 to 3
03:33 PM rue_shop1: and 4 to 5
03:33 PM polprog: ok
03:33 PM polprog: lemme take notres,
03:33 PM polprog: notes*
03:34 PM rue_shop1: 02.00, 00.02, 60.025810
03:34 PM rue_shop1: 02.02, 641.24, 60.034821
03:34 PM rue_shop1: 02.02, 641.24, 60.025810
03:34 PM rue_shop1: I love it when impossable things happen
03:35 PM rue_shop1: the differential voltage on the second channel is NOT 641V
03:38 PM rue_shop1: ok thats better , sign error, now I have a mean amplitude of -0.02V
03:39 PM rue_shop1: yay, thats all 4 channels
03:40 PM polprog: do i need tyo find r and c such that RC = 1/40k?
03:40 PM rue_shop1: hell no, start with a cap of 0.047uF and play with resistors
03:40 PM rue_shop1: math dont mean ---- in the real world
03:42 PM polprog: ill be taking the signal outta 4-5 pins?
03:42 PM polprog: 4 and 6
03:43 PM rue_shop1: yes
03:43 PM rue_shop1: because its buffered
03:43 PM polprog: yes
03:43 PM rue_shop1: 1k might be enough to drive them
03:43 PM rue_shop1: iirc I also had to duty trim, but see if it basicalyl comes to life
03:45 PM polprog: not getting a signal at all
03:48 PM rue_shop1: ?
03:48 PM rue_shop1: 5V right
03:48 PM polprog: yeah
03:49 PM polprog: ok ive got my 25khz gen on the other breadboard
03:49 PM polprog: lets go on
03:50 PM rue_shop1: 40Khz
03:50 PM rue_shop1: 30 at least
03:50 PM rue_shop1: otherwise it'll saturate and short
04:07 PM polprog: rue_shop1: is 770khz OK?
04:07 PM Thymo_ is now known as Thymo
04:07 PM polprog: 710*
04:07 PM polprog: i need to recap my effing freq counter
04:07 PM polprog: because its freezing allt he time
04:08 PM rue_shop1: no
04:08 PM rue_shop1: 40khz
04:08 PM rue_shop1: +-10Khz
04:11 PM polprog: 43. the jitter is bad
04:11 PM rue_shop1: its on
04:12 PM rue_shop1: \]ok
04:12 PM rue_shop1: jitter doens't matter
04:15 PM polprog: ok, got it
04:15 PM polprog: now i use the transistors to switch the inductors polarity'?
04:23 PM polprog: rue_shop1:
04:26 PM polprog: the yellow inductor makes 1.1v
04:28 PM rue_shop1: what, no
04:28 PM rue_shop1: what
04:28 PM polprog: in the configuration i connected it to
04:28 PM polprog: as*
04:28 PM polprog: anyway
04:29 PM rue_shop1: the inductor shoudl be jumped so the interfonnecto is liek a center tap
04:29 PM rue_shop1: you put that to +v
04:29 PM rue_shop1: and the transistors pull each side down to 0V
04:29 PM polprog: okay
04:29 PM polprog: right
04:29 PM rue_shop1: and when each side it pulld own, the toher side goes up by rthe same amount
04:29 PM rue_shop1: aka one side goes from 12 to 0 and the other from 12 to 24
04:29 PM rue_shop1: then it switches over
04:29 PM polprog: wait
04:30 PM polprog: likw in the drawing yu sent me?
04:30 PM polprog: im just messing around with converters casue u never did previously
04:35 PM polprog: great, it seems to be working
04:36 PM polprog: that is good
04:47 PM polprog: the duty cycle needs to be corrected
04:48 PM polprog: the duty cycle needs to be corrected
04:48 PM polprog: huh why did it send twice
04:52 PM cehteh: becasue you send it twice
04:57 PM polprog: it works for me at 80khz as well, needs a ballast resistor
04:58 PM polprog: it went up to 70V with no load
05:00 PM polprog: anyway
05:00 PM polprog: it takes too much current for me
05:01 PM polprog: ill be experimenting more
05:22 PM polprog: so id need a control circuit that would keep it steady at about 15V
05:22 PM polprog: good
05:24 PM polprog: nighters
07:23 PM rue_shop1: my buddy just left, working with him and his brother to make a bionic hand, as his brother got his caushgt in a meat grinder
07:24 PM rue_shop1: broke 2 fingers, for the 2 months he will have a cast, he gets a bionic hand
07:24 PM rue_shop1: polprog, the curren tis from the duty being off
07:25 PM rue_shop1: you can tweek the duty
07:25 PM rue_shop1: I'm perfectly out of sync with prettymuch all the interesting people to work with
07:26 PM * rue_shop1 tries to go back to his happy place
11:41 PM day__ is now known as day