/diy/ - Do It Yourself

>>788651
Cool build OP.

I am building a PLC program for a reverse osmosis water purifier.

Here's an image of the PNID

I didn't build anything today, but I've been calibrating and characterising something I built yesterday, all day today.

>>788651
Theory of operation, please.

>>788651
cells? capacity? looks cool. I'm in the process of building one myself;
>>787060
but I've opted for a kit to fill with Lithium cells and a salvaged LM2596 bucking reg.
Buck converter or linear?

>>788651
I've been working on designing my own oscilloscope. I got the last of the circuit bugs solved yesterday. Printed the revised PCB and started assembling it today.

>>788695
>something
explain
all that looks like is an old tuner hooked up to voltometers and a calibration curve of thermal values?

>>788877
what did you use to make the readout monitor?

>>788887
It's an analog CRT scope. Horizontal deflection yolk is fed a saw wave of variable frequency. Vertical deflection yolk is fed an input signal of variable amplification.

>>788890
you raid the relics from a science building or something?

>>788893
I pulled the CRT and flyback out of one of these old 5.5" black and white TVs (dumpster find). I've built scopes with them before by running the speaker connection to the vertical yolk, but that's really janky and not good for anything but a prop.

>>788896
thanks, I'll keep an eye out for a shit tv

A Photopopper. Soldering skills need improvement but for now, everything works.

I'm starting to build my quadcopter. I printed these, but its gonna be a lot cheaper to order it from HobbyKing.

>>788927
How much are all the electronics and shit going to be?
I want to build one but im not sure how much I want to dump into it.

>>788877
Are you using that CRT to make an analog scope? I spent my whole teens in exactly that project, and finished it sucesfully, with an amazing 100Hz bandwidth
E-mail me if you are interested nyan-cat(at)mail.com

>>788995
Forgot the pic

>>788998
>>788995
>>788877

christ fellas, you're makig me want to pick up that idea again


I have an old shitty CRT that i thought about it, but i thought it' might've been too much effort to make something proper

( i was just gong to feed signal directly to deflections for instance )

>>788998
That is pretty sweet build

A solar cell characteriser for my uni work.
We have a parameter analyser which does the same thing quicker, but I just wanted to see if I could make one myself with a simple motor turning a rheostat and the arduino sampling the IV data points.

>>788651
Also OP, what's in the box?

>>789032
-Step up converter
-1S lithium cell
-usb lithium cell charger
-bleed resistor
-few capacitors

>>788722
>cells?
Two 18650 in paraller
>capacity?
3.4v - 36v

Just screwing atound testing stuff for a diy vibrator i am making for a friend

>>788886
I'm glad you asked. It's a four-channel, isolated, programmable, data-logging 10 A/150 W current sink, designed for characterising batteries. I was calibrating the 2-channel fan controller to make sure it didn't allow any single channel to overheat even under light load conditions, where the heat sink won't get as hot as under heavy load conditions.

>>789041
I meant capacity as in mAh. How long will it power something drawing 500mA?

>>789048
"friend"

>>789048
>friend
right...

>>789052
neat

>>789063
Yes a friend.

>>789068
Just make sure it's well wired and insulated, or your little friend downstairs is going to get hurt.
And no one like mangled genitalia.

>>789071
I will this was done for just testing the motor and how wrong csn things get with 9volts

>>788651
I've been dicking around with SR flip flops. Trying to build a 4 bit register for the states of 15 comparators, and trying to do it using only NPN transistors.

I've almost got a solution for the register that only uses 4 transistors per bit, but encoding 15 inputs into a 4 bit parallel arrangement seems hard. Would I just use something like a 74LS158?

help pls

I'm about to rip a snow blower engine from its home and pop it on a go kart frame

>>789072
3rd degree burn if it shorts directly in contact with your dick.
You will lose it if that happens, although that is a worst case scenario.

cool. i'm building a similar power supply but mine has variable current and voltage.

>>788651
Built a demo stand for my local university to lure people into industrial automation.

It's a PLC driven application (programmable with a really friendly GUI) with 8 sensor/actuator pairs to play with. On the pic you only see one (prototype) since I hadn't yet built the others.

PS. some idiot from my company thought it was a good idea to do the sensor-box internals using point-to-point soldering. Shit sucked.

>>789687

>>788676 here:
I work in the industry automation industry.
What brand of PLCs are you familiar with.
I understand that ladder logic is largely the same across most brands, but I find that I greatly despise the two industry leading standards, Automation Direct's Allen Bradley, and the German nightmare Siemens.

That said, the Korean underdog Koyo Click is an absolute dream to work with and never gives me anything to complain about.

Good luck seducing students with the allure of sweet, sweet, industry automation.
I'm sure they'll have a great time learning how boring and mindnumbing it can be. :^)

But seriously, kudos man, that's a cool demo.

>pic related, current project.

>>789695
I work for ABB so I only dabble in our own products. We have competence in all the major players just in case the customer specifically asks for Siemens or what not.

I've never done ladder because of software dev background. Imho, ladder is complete and utter shit in the year of our lord (only oldfag electrical engineers use it here). Structured text and CFC is where it's at for me. And since everything cross-compiles into C anyway I found a way to do most all just programming C and integrating it into applications using ST as a wrapper much like one would use C to glue assembler together.

And yes, it is fucking dumb. I just quit because doing PLC work is... I'm not feeling it really. A child can do it.

>>789687
Hey, that looks cool.
Can you post it when you have the whole thing done?

Today I finished my retro detonator.

This ghetto ass 100watt ikea led work lamp
> zener regulated fan
> no current limiting because yolo


>>789052
Can it take ac loads ?
Also, did you salvage that huge milled aluminum case from a spectrum analyzer ?
It kinda looks like rf shielding .

>>789705
I'm very proud of this

>>789706
You can't really tell by the picture but it's very bright

>>789704
Nice how did you make the dynamites

>>789695

>siemens

nope.jpeg

at least give me a plc that works with codesys. as that program is at least constructed to be logical for programmers.

simatic manager is literally designed for people who don't really understand how actual programming works and rather uses obscured electric schemes

>>789709
If you pay 3S enough money they sell you support libraries for Siemens ;)

>>789306
How the fuck i touch the wires on purpose and nothing happens

>>789704
Wait, is that decorative or does it actually work?

>>789707
And it actually requires a heatsink and fan?

>>789716
Because skin is not very conductive. You can melt thin metal by placing it on the two ends.
How conductive is semen anyway?

>>789030
is that the eevblog µcurrent?

>>789030
> that keithley meter
> that huge optical bench
> that ucurrent
> all that other stuff

I couldn't be more jelly

>>789717
>And it actually requires a heatsink and fan?
Not that anon, but yes, it does. I have an array of 1W Power-LEDs and they generate a LOT of excess heat. Enough so that I had to add a cooling system besides the aluminium star-base.

>>789705
>Can it take ac loads ?
Not in any meaningful sense. It's probably fast enough to regulate well if you feed it a 10 Hz sine wave going from 0-15 V (as in, no negative swing), but that's about it.

>Also, did you salvage that huge milled aluminum case from a spectrum analyzer ?

No, but from an analogue TV transmitter power amplifier. 500-ish MHz stuff dated 1980. Needless to say, these huge heatsink modules are much more useful for high-power stuff like this, than their original intended purpose.

>>789930
>>789705
Also, I forgot to type out that I really like your lamp. What kind of LED is it? Generic Chinese or brand-name?

I have some similar DIY LED light fixtures, and I really like the light from raw LED dies.

>>789930
> TV transmitter power amplifier
> https://www.youtube.com/watch?v=mR_wJkxKSXU
> https://www.youtube.com/watch?v=ZmyYYKFePz4

D.. Dave.. Is that really you? On our /diy/?

> PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE

>>789717
This is going to be used by the girl i am making this for. Any tips to not fry her

>>789705
Can you explain me what is zener regulated? and whats the difference with your setup and just use a resistor in series to the fan?

>>789708
>>789717
Dynamite is from wooden stick.
It's decorative and also actually working.

>>789722
looks like it

>>789953
No, I'm afraid not. He wouldn't build something as shoddy-looking as my current sink. I just happen to have a whole heap of parts from an identical transmitter lying around.

Mine's got a lower serial number than his, so he can suck it!

>>789932
Nice lamps,
What do you use as powersupply ?
I'm planning on going full retard and putting 20-30 of these on a single plate
How rad would a 3kw led pannel be ?

> Generic Chinese or brand-name
It's a generic chinese one from ebay.

I wonder how better a brand one would be if at all ? Have you compared ?

And, yes , the raw light from these leds is gorgeous.

It really beats the crap out of the 1kw studio halogens I had before.
> work for 3 hours
> room is now sauna
> 2 hours more
> room is now sweat scented hammam

>>789953
I doubt it ...
But dave being on /diy/ would be the greatest thing ever.
I guess he's way too busy on the eevblog to go anywhere else at all.

>>790118
Again, I'm not Dave Jones.

>What do you use as powersupply ?

Two laptop power supplies in series, and four Sureelectronics step-down LED drivers, driving four 10 W LEDs each.

>How rad would a 3kw led pannel be ?

It would be liquid cooled tier rad.

>I wonder how better a brand one would be if at all ? Have you compared ?

You get much better CRI, less variation between dies, and more light per unit power.

>It really beats the crap out of the 1kw studio halogens I had before.

I'll take them, my workshop is far too cold to be comfortable.

>>789967
Make sure to model it after your own penis (inb4 grill). If you don't you won't ever be able to live with your regret.

>>788877

>>791800

>>788877
>>791800
>>791801
daily reminder that some people on /diy/ are HARDCORE AS FUCK.

Also nice double doubles

>>790118
lol don't bring dave here.

don't trouble the poor dude.

>>791818
It's part of a larger synthesizer project.

> Why does your synth need three vectorscopes?
Because vectorscopes are awesome.

>>790118
>I guess he's way too busy on the eevblog to go anywhere else at all.

Post the /ohm/-Electronics general thread in his youtube vids and eevblog forums. We need a guest in here.

>>791825
See, you post this all the time, and get no replies, because it looks like impractical junk. Are you just building this to flash around?

> CRT's around audio gear with no appreciable or visible EM shielding.
> "Because vectorscopes are cool"

I'm guessing it's just for flash. There is no reason to put a noisy circuit like a CRT and its drivers into an audio synthesizer.

>>789722
yup, super handy to have.

>>789705
Might make one too if I come across an old heatsink, thanks for the idea m8

finished now wiring up my "new" keyboard to the teensy.
now going in for testing the first half with sw.

>>791837
> I'm guessing it's just for flash.
You'll change your mind after I'm ready to show off the audio output. My past projects have always been costumes and light shows where flash is the entire point. I'm still in that mindset and doing things just for the visual, but this project isn't just flashy garbage.

Ja pitolę, jakie to jest brzydkie.

>>789048
>diy house fire

>>789968
I think he/she means this http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/zenereg.html
Just a very cheap (and inefficient) way of regulating voltage

>>789968
I'm actually just dropping the 32v rail to 10v with a reversed biased 22v zener.
It does exactly the same thing than a series resistor but the voltage drop is constant.
If I dim the led to 28 volts, the fan becomes noticeably quieter since the supply drops to 6 volts.

If you do the same, try getting a 24v fan instead of a 12v one.

>>789706
I like the refurbish-like style with the parts exposed

(re)Heat treated knives for my dad and brother. Was originally for my dad's 50th birthday (which passed) so mom asked that I write "Golden Boy" on it. Still want to maybe enlarge the detent hole since it doesn't really retain as well as I'd like.

>>793521
Also built pic related to etch some knives, but I don't have stencils and I prefer to engrave with a mill so I don't know, I guess it was a fun shitty little electronics project and I can use it whenever in the future.

>>793523
So it's like a power supply for electroplating?
Are you using batteries or connecting it to the wall?

>>793523
'w' on you label printer broken anon?

>>791841
They are great LED's just do not look directly at it or you will regret it for about half an hour.

I got a power supply from an old Linear actuator which runs it pretty well. If your into them this fellow has some good vids

https://www.youtube.com/watch?v=8WjYmuUcvXo

>>794788
It was the way it as marked on the circuit diagram. Though I guess it does fit better with the tight spacing.

>>794788
That's a common way to write slow blow. It's actually trademarked.

>>794783
Sorry didn't see your post. It's basically a glorified AC/DC 12V power supply that steps down from 120VAC wall outlet. It's designed for etching names on knives. You use it with a stencil and some electrolyte (even as simple as salty water) to put your name/maker's mark.

>>794985
Parts list/tutorial from here:
http://www.logiudicecustomknives.com/knifeshop/etcher/index.shtml

>>791864
what does this thing do?

nothing fancy, i modded this sega genesis model 2 for svideo and a/v out.

that svideo din is slightly askew and it's driving me nutso

>>788651
>What did you build today?

Nothing much. Just a simple chain replacement for a couple grow lights for salad greens. It is made from 14 gauge galvanized steel wire (fencing wire). I used a very long 3/8" drill bit to wrap the coil around, bolt-cutter like pliers to snip off the rings, and two pliers to open and close the rings to make the chain. It is the same setup as making maille, only I'd use a cutting disc for the rings then weld them with a ring welder.

Though these are not welded, they do work very well since the weight of the 4' long, 2-bulb, shop lights isn't much at all.

>mfw reading this whole thread

Ok here we go. I have been lurking on here for years and taking in bits of info. A huge thanks to Shopping cart dude for some component inspiration...This is my Light Jacket. Wore it last weekend at a doof, was cool. Currently planning a new version with improvements

I built a box mod for my ecig habit. The toggle switch is mainly for charging and wired parallel to the push button. Next step is to add a voltage regulator and a dedicated charging circuit.

>>795959

>>795916

Post more details on the build. Looks interesting. Version two should have more protection for the wires; learn how to sew and route them through parts in the cloth maybe.

>>795985
this was a pure prototype. It was all hand built and velcroed in for easy access..It uses 48rows of 6 RGB LEDs. Each row is controlled by a WS2803 driver. had to Hand solder the bloody SMDs. The whole thing runs of 3 10Ah battery packs, and is 'currently' driven by a Galileo Gen1.

>>795959
>>795960
could i have some basic plans for this thing?

>>796006
disregard that post

>>795992
>had to Hand solder the bloody SMDs
Why didn't you use the DIP WS2803s?

>>795992
that's a pretty shitty job OP.
if you lack the coordination to use fine wire, get a cheap pot of 3$ solder paste then smear the leads with it. then just apply the soldering iron to each leg.

>>788651
Put new brake pads in my car and attempted to go rallying down a few dirt roads since it's rainy and everyone else is working. Ended up in a muddy ditch 30 mins in.
I've decided to not begin anything that isn't necessary until I've completed what I've got sitting on the infinite development shelves.
I will begin working on the board and code to to drive an LED sign I acquired sometime last year before I head to work. Will probably have something working by saturday/sunday.

>>796101
Worldsemi no longer make the DIP packaged chips, at least i couldn't find enough
>>796105
Yep its a shitty job, but it works. and fuck you

I added Bluetooth to this old tube radio clock.

>>795769
I dig it.

>>796424

For what reason?

>>796425
visit us over at /vr/ once in a while then.

i'm currently trying to figure out what the fuck is wrong with the composite input on my pvm.

just for fun though, i wont ever need composite with svideo and rgb (although though a shitty db25 cmptr connector)

I'm bored

>>796687
Probably so he can play music from his cell phone on it.

>>796268

Hey I remember you were asking me about that sometime ago. Hope you get it going!

>>796424
>>795769
How did you do it? Post pics of the insides!
I also might want to mod a Sega Genesis too though.

Fungal artificial selection, trying to get conydians to live in an acid environment, so they can clean shit up

My tolerance for hard liquor

>>798629
This is an important step on your path to being pro at electronics.

>>798420
here's another one in progress. i'll up the simple schematic after this.

purple/blue/green wires tap into vcc, luma out and chroma out from the video encoder chip. into my lil amp (in heatshrink) then luma/chroma out (left blue/green wire)
yellow/orange/red are composite video, left and right audio tapped from the vias under the av jack

it's a super easy mod, couple resistors, an elec cap and a 2n3904 transistor

looks great

>>798721
this is for sony's CXA1145M ic, but model 2 genesisessesses have a few different video encoders.

this same mod works on fujitsu's MB3514 as well, same pinout.

>>798457
Biology /diy/! He's trying to kill us all!
What specie of fungus are you using? Searching conydians doesn't yield any results.

I finished my nixie clock tonight.
Potatoes pictures for you all guys!!!

>>798933
The box can be locked... it is useless but it can !
I'm pretty happy with the result.

>>798937
Now try to take it on a plane.

>>798937
>>798933

Looks good! I'd like to see better pictures of it though

>>798933
Leds ruin the warmness of the nixies, other than that, it looks very nice.

>>798950
Thank you !

>>798965
Yes but since I can turn them off, it is not a real problem.

And in the dark.

>>798947
I did't get what you mean.

>>798933
nice, pics inside plz.

build it all yourself or did you buy a kit?

>>799369
the nixie is a kit, the rest I did it all by myself and it was pretty hardcore.

>>799366
Normal people have no idea what nixie tubes are.
I want to see the security people get freaked out.

What did they break today...
>Fucking idiots.
>They did it twice.

>>799500
Dat leadscrew
>#snapped

>>799498
Remembered me of this:
https://www.youtube.com/watch?v=m4R3hODnTGo

I've made a plasma speaker with a tv flyback and a 555 based circuit, the volume is not as high as I would want to, maybe using a single transistor to amplify the signal before feeding it into pin 5 could help. Also I had to cool my mosfet in water so it doesn't fry, electrostatic discharges destroyed the fan that I was using.
https://www.youtube.com/watch?v=1JVb1rPwtEY

>>799398
i thought it was the same one with the RGB LEDs that i have.
there's a new model that doesn't require shrinktube around the LEDs.

where did you get it from and for how much? if you don't mind me asking.

>>799500
>sandvik

lathe tools crashed into chuck?

>>788651
I'm working on building an underwater rov and a control box to go with it. I'm hoping to get some decent video of fish. Or go treasure hunting.

>>798754
I dont know the species yet. I dont even know the genus.
I made a medium of egg and cocacola zero (contains aspartame). Left it out for a couple of nights and brought it baack inside into a dark spot. Its growing very well and can use aspartame which is really amazing for a fungus. I want to select it for fast growth.
Im going to stain it soon enough (simple staining) so i can verify the genus!
It doesnt appear on any tables.
I have an AmScope which can magnify to oil x1500 maximum. Pretty neat

Broken wire wrap/unwrap tool
Filed flat. File half off. Filed teeth in for cw ccw unwrapping.

>>799717
Yip, indexed the turret right into the chuck.

This

>>800243
Bowels

>>800243
Brain

>>800248

What is it?

>>800243
>>800245
>>800248
DIY dummy load?

>>800269
>>800290
Workplace for students, with few strain gauges (tested object) peltier cells (heat/cold - error). Aluminium rod is bended with motor and screw, then heat error is evaluated on few circuits with strain gauges, preamps ADC and RasPi2. there is also mouse and monitor with python gui as HMI. Its my final thesis btw...

>>800297
I have no idea what any of that means but it sounds fucking neato

>>800299
It is indeed, spend too many nights on it

>>795896
You're not the only one

>>800297
Master or Phd?

>>797451
I work 30 mins at a time before I lose interest. I've got everything built up, now it's just a matter of getting the code to shift out letters as bytes to the registers. It's a pain getting text into a bitmap.

>>800332
Master, I wish I could do a PhD but now I have kid and fulltime job so this is the end.

>crashed

Rekt

What multimeters do you use?
Are there decent ones around 25 $?

>>788651

A new Tesla Coil Controller Board...

150W Flyback driver, although I'm looking for a transistor that performs as good as the irfp250 mosfet to replace it since I have doubts about if it's still working properly.

Question: Does something happen if you connect the output of the 7812 regulator to 12 volts and the ground pin without connecting the input to anything?

>>802537

Why dont u use a ZVS circuit? Cheap an Powerful. No nothing will happen the only thing which you should consider is that the output potential never should be higher than the input potential. Just for safety solder a 1N4007 from input to output with the cathode facing the input. ANd always use 100nf caps on the input and outout.

>>802544
ZVS draw too much current, my PSU can't handle that. Maybe I'll make another version of this one with audio input.

>>802477
what method are you using to make the pcb?

>>802544
I found out by looking at the schematic that between the output and ground there are a bunch of unactivated transistors and several resistors, the equivalent resistance must be around 3kOhm, 4mA are not much to worry about, if I had some space left I would add a diode though.

>>788651
What did you use for the panel display?

>>789695
>taking sophomore mechanical engineering lab
>PLC section, using Siemens software to program it
>shit crashes like 2 or 3 times back to back

Somehow I thought professional software would be more stable than consumer entertainment stuff, but nope.

At least I was first in class to make a working algorithm.

>>802997
I wish we did some actual work with Siemens PLC in School..

All we're doing lately is play around with pneumatics and that's boring as fug.

>>802997
>Semens
>PLC
I don't know where everyone fucked up more. DDC da future dog.

>>803000
> I use a tripcode because 4chan cares who I am.

>>802641
Well the good ol' photoactive base material + uv lamp + fe(III)cl
i do this kind of stuff at my job because of reasons i can build whatever i want and use industrial quality machinery like cnc and stuff. Just today i ordered a bunch of neat igbts vor my next tesla coil project, a qcw drsstc.

>>802550
Plasma Speakers are neat. Im planning a sound system with them at this very moment. Selfmade ferrite core transformer with a igbd fullbrige and raspberry for the pwm and stuff.

>>803120
>raspberry for the pwm and stuff.

Make sure to shield it properly and keep it away from magnetic and electrostatic discharges, I tried to use my arduino to drive a flyback and it was going nuts at 30cm from it.

>>803135

Well ill use Fiber Cable for the transmitting of the pwm signal to the gdt driver which consist of mic4451 and some basic logic chips. Everything will be nicely shielded. Ive learned my lesson after putting a cmos logic control board 20cm apart from my DRSSTC without any shielding. RIP FF300R12KE3 IGBT. Pic semi related its a early Fullbridge Design

>>803397

Forgot Pic.

This is where I am so far in building a tiny network closet.

8-porter on the inside, router on the outside. Central location in the home for best signal.

I just built this, it's basically an endoscope-like light made with a joule thief circuit and optic fiber.

>>804529
Another pic

Finished my box!

>>804574

>>804577
Heh.

>>804577
You should stick a pocket pussy on the other end.

>>804577

>>804582
I'll put a car cigarette lighter behind it and hook it up to mains voltage.

Just for you.

Wanna know whats inside eh?

working on my big ass flashlight. Will drive it to around 150W wehen i finish the current and temperature sensing.

>>804945
>flashlight
needs extension cord...

>>789967
Just give her the D.
You know, do it yourself.

>>789048
I don't like to be that guy, but this isn't allowed on this board.

>I.. I make them, too...

>>804960
>has battery
Normally there is a lipo on the back.

Hello im a /b/fag and it's my first time here. Was a mistake that I clicked this place But now I'm really interested and monitoring this thread.

keep the good work up

nailed it

>>795748
its a fully programmable keyboard

>>799707
Here is all I got about your question sorry for the late.
Nixie Clock QTC With Z5700M Tubes Included (QTCZ5700TU) = £109.95

>>788651
I need to post a picture of my kids in these threads, as they're the ones preventing me from starting any project that takes more than a few hours (they're 1 and 3 years old, and somehow picked up some tornado-genes).

Besides, while I didn't make them today, they can be considered DIY projects, built from scratch.

>>806566
Go away, we don't need your approval.

>>804529
>>804535
that's cool

>>806586
I googled about a bit, I want to build one for myself too. Could you make like a tutorial or at least some more high res pics on /diy/? Also which teensy are you using?