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File: circ1.png (69 KB, 1240x583)
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My Dryers heater coil is not turning on.
>240vac from wall is OK.
>heater coil, thermostat, thermal cutoff sensor all ok.

Moving on to the main board, the relay that sends one leg of 120vac is not turning on. Checking voltage on the relay its getting a constant 12VDC & no ground. If I ground it myself the relay will energize and switch properly allowing the heating element to come on. I move on from relay to find source of ground signal which is this darlington transistor array in the image. I first assumed he was bad but I'm not to sure now, I started thinking he was actually OK after removing & testing with curve tracer.

So this next guy in the chain is a Renesas 78K0-KD2 MCU (78K0525A).
I was kind of assuming he would be the one to change signals but Currently:
when element should be on he is sending a ground signal.
When element should be off he is sending a ground signal.

I don't really know much about this stuff. Anyone here can help me understand? Would the switching signal come from this mcu or on the COM line?
6 replies and 3 images omitted. Click here to view.
>>
>>1513667
Its a $800 dryer vrs maybe a simple part.
I have a replacement board coming in but I like to tinker.
>>
>>1513673
This was my assumption but the output from mcu is not changing. So your opinion is bad mcu (or mcu is not seeing what it wants to see to allow the switch)
>>
>>1513682
>This was my assumption but the output from mcu is not changing. So your opinion is bad mcu (or mcu is not seeing what it wants to see to allow the switch)

if you really want to check, cut the trace somewhere convenient and check the signal

while you're at it, feed the darlington input with whatever the MCU supply voltage is and see if the relay clicks
>>
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>>1513685
Thank you that was exactly the advise I needed. I lifted the pin on transistor and gave it 5v. Relay switched.

I guess the mcu is not recognizing a certain requirement or the I/O has gone bad on that pin. Not really worth digging around any further.
>>
>>1513680
Buy a better dryer that won't break on you.

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What are you working on? Are you making a bad ass knife? Breathing life back in to an old bronco? Fingerboxes? Post it here, show off your work!
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>>1506148
>>1513562
Here's my ball catch so that golf balls don't roll into the chamber, it's made out of a few tiny pieces of the sdr 21 I cut
>>
>>1503895
just finished remodelling my mom's kitchen a couple days ago, she's happy
>>
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i've been putting together this portable apartment air compressor for a while, based on a fridge compressor. now it has an automatic pressure switch, unloader valve, water filter, and dessicant on the input. pretty much everything a compressor needs to have, and it's ultra quiet.
>>
>>1513747
Wow, any idea how much air it moves?
>>
>>1513752
not too much. it takes about a minute and a half to pump that tank up from 85 to 120 psi. this is a small compressor from a mini fridge or water cooler, a full size fridge compressor might move more air but not much more. it's the price you pay for quiet. I won't be doing any sandblasting with it for sure.

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i am a brainlet. how do i start making stuff and connecting wires like you guys? do i habe to buy a raspberry pi or Arduino. Only technical knowledge i have is new starting the laptop when ot hangs
56 replies and 19 images omitted. Click here to view.
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>>1513658
>the drop will be much higher
right, at least thats my understanding, its a small load tho, for testing low mah batteries like lr44 or 9v batteries
>>
>>1513662
Here’s a Chinesium HF AAA that came in one of their free lights. Wish I had some Energizer Lithium AAAs nearby because it would be interesting to see the drop between the two, I’m assuming it would be much lower on the lithium even if they were reading the same with no load.
>>
>>1513686
the drop would be less on the lithium because the capacity of the batteria is higher
>>
>>1513691
Yeah but doesn’t it also depend on the amount of current the battery can put out? Like if you had two identical car batteries charged to 12.5V, one is new and the other is 5 years old, wouldn’t the drop be higher? Or two 2000mAh 18650s, one is rated at 15A max discharge and the other at 25A, would they be different on a test like that given they start with the same voltage?
>>
>>1513708
youre specifically testing the capacity, not the discharge current.
the load in the dvom is around 300milliamps i think,i doubt it would show a difference on a car battery because of the huge battery capacity.
automotive battery load testers are 100 amps

File: IMG_20181205_102843.jpg (3.36 MB, 3120x4160)
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I made this ring out of a strip of mahogany veneer and some scrap silver wire for the inlay (which turned out slightly crooked, what happens when I work on things at 2am). My friend said I should post on here and got people's opinions/appraisal of what they'd pay for one. Thoughts?
10 replies and 1 image omitted. Click here to view.
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>>1509803
how did you made this?
>>
>>1509803
Tell them it was made by a blind artisan suffering from Downs syndrome and that all proceeds go towards curing breast cancer. Easy $25 bucks and ticket to hell.
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>>1510226
where there's a will there's a market for it. Some idiot will buy it.
>>
>>1510532
Enjoy!
>>
>>1509803
Looks like it's cutting off the circulation to your fat finger.

Is there a proper way to fix this? Or am I fucked?
6 replies and 1 image omitted. Click here to view.
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>>1512930
Nah, Just hang a painting over the wall and hope the landlord never checks.
>>
That’s old B/X cable, the steel jacket is used in place of a ground wire. Like was said earlier, that stuff is looking to be in rough shape and very likely needs to replaced in its entirety. You will gain the benefit of a new and properly wired (and grounded) circuit.
It’s def worth a few bucks to have it done right and safe
>>
>>1513197
It's a ceiling. :(
>>
>>1512930
Just slide some tubing over the hot wire as far down into the conduit as it will go.
Trim off the excess and you have new insulation on that wire.
>no big deal if the neutral touches the conduit...
>>
>>1513155
>>1513547
>Is there a ***proper*** way to fix this?
You got the conduit and a wire pull already in place. No answer outwith 'replace that trash' should be contemplated. Its hardly 'rebuild the entire shithole' FFS

Looking to find some info on this crate before I even touch it. Was going to put some records in but it’s not wide enough so I want to sell it to rich white people. Anyone able to point me in a direction to find out more about the company?
15 replies and 3 images omitted. Click here to view.
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You’ve swayed me to keep it. Any tips on what I should use to restore it or give it some life? I’ve heard Murphy’s oil soap
>>
>>1512858
>Murphy’s oil soap
good for wood, but not sure if that would harm the label printed on the box though
>>
>>1512276
Based grandpa
>>
Dude finish that counter top for chrissakes
>>
>>1512045
Seeing as nobody’s ever heard of the Hub Ginger Ale company, you’re not going to make squat selling that box. Maybe you’ll get $15 at a pawn shop or second-hand store. You could always take it to an antique dealer in Philly and see if he knows any history on it or point you to someone who does, but sorry, Jamal; you’re still gonna have to go to wor- errrrrr, the programs office.

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There's this old house I'm taking care of. It's been abandoned for two years and filled with trash so mice made a habit of visiting the place.
I've patched up every hole I could find, trapped or poisoned the regulars and the place seems fine now.
The problem is I fixed the heating and I'm planning on keeping it on through the winter but I'm worried the cozy warm place will attract new visitors. (There's a cropland from one side of the property and a few neighbors with swines and other livestock so plenty of rodents running around.)

Is there a way to make them avoid the house completely other than painting the walls and every object inside with cat piss? Thanks.
9 replies and 1 image omitted. Click here to view.
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>>1509261
>painting the walls and every object inside with cat piss.

Believe it or not that would attract more rodents then it prevents.
>>
>>1509261
Just buy an AR15 like a good ol' American.
>>
.22lr
Cat
Poison
Clean your area (especially ciggy butts)
>>
>>1511336
>and Pic Related
>>
>>1513129
What the fuck is a canette

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Post your projects, where you had to deal with small miscalculations and/or spatial deformations of things.
>pic related: the cabinet door elongated after mounting, making it impossible to open
14 replies and 3 images omitted. Click here to view.
>>
>>1512269
Dont have a pic, but my dad started to hang up sheetrock, and forgot to put in the insulation
>>
>>1512626
Century dweller. Can confirm.

Please arson my house so I can get the fuck out
>>
>>1512712
Thats wtf quarter round is for
>>
>>1513023
Put some tape around the inside edge and cram it back up there.

Never pay until the job is done
>>
>>1513099
LOST

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Here is my DIY car paint job, turned out great imo
27 replies and 8 images omitted. Click here to view.
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>>1513345
Flint's Auto Parts Berkeley, MA

https://www.google.com/maps/@41.8239019,-71.0668032,112a,35y,237.99h,45.01t/data=!3m1!1e3
>>
>>1513358
I actually used rattle cans, the stuff went on so smooth though, I am planning on maybe ceramic coating the car to hopefully make it last.
>>
>>1513359
Thank you, I may just go pick one of them up for a parts car
>>
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>>1513361
No problem, I mapped out the locations of them. Nothing looks out of place from the photos and I doubt that the inventory will be moved anytime soon. Good luck.

>>1513080
(1)
>>1513081
(2)
>>1513083
(3)
>>
>>1513365
Thanks man I really appreciate it

File: 2x lego.png (2.04 MB, 1920x1080)
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>C-worker done a stupid(read: I did a stupid)
>Double sticky tape on paint
>Need tape off
>Can't use usual dosolver because it kills paint as well

What to do?? Pls halp
>>
>>1513295
Try vegetable oil

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How difficult would making a custom music box be?
I see custom boxes online that are $100+usd that are just a box with a speaker in it.
Suggestions for other /diy/ gifts also welcome.
5 replies omitted. Click here to view.
>>
>>1512271
Difficult? For some one who knows what they are doing it would be trivial. It still takes work, especially if you think you're going to be making this without machine tools.

The pictured mechanism could be simplified greatly though. The spring, winding key and ratchet could all be inside and inline with the spinning drum.

Designing the comb also takes some basic physics knowledge; the speed of sound in materials, the wavelength of a particular frequency and what notes correspond to what frequencies. Trivial stuff for some one who isn't braindead.
>>
>>1512676
>Trivial stuff for some one who isn't braindead.

Clearly you have never made anything more complex than a paper airplane. Show any project you have made that is remotely comparable to a music box, especially a spring powered one that has a speed governor. Your reference to "the speed of sound in materials" is either master trolling or lunacy.
>>
I'm a watchmaker and have spent some time with guys who do custom music box work. These guys worked with the dudes from Reuge in Switzerland, and even being badass micromachinists and with the knowledge gained from one of the best music box makers, they had to pump considerable skull sweat into these projects. So yeah, it's doable but the learning curve is really steep.
>>
>>1512287
Hah, wooden cylinder would last one play
>>
>>1512287
>Hmm I can do some wood work
You can buy these music box innards at hobby shops. Stick to wood working and you can make some nice boxes.

Hi /diy/
I'm looking to modify my door/doorframe with some kind of locking mechanism that allows me to lock/unlock it from the outside as well as from within. I'm 19 and living at home, saving up for a room near my uni. Problem is, my parents don't allow me any privacy, and still treat me like I'm 12. I've tried diplomatic reasoning, but they refuse to recognize me as an adult. I've tried putting a door stopper under the door from the outside and removing it with a pocket knife when opening, but they just put all their weight onto it and open it regardless (we have a very slick floor). I have to lock my room somehow since they still go through my trash and shit looking for cigarettes (I don't smoke) when I'm away. Ideally, I want to install something that doesn't require major changes to the structure of the door (drilling holes, etc.). I've thought of this little rotating piece of wood at the bottom of the door that I can flip up (not locked) and down (locked) with a special hook-shaped stick, but I've not conceptualized it clearly enough. Plus, they'd just find a way around it. Help me, please?
2 replies and 1 image omitted. Click here to view.
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>>1513164
Just put a deadbolt on it with a key lock ffs
>>
>>1513170
This is not a matter of growing a pair, they're just horrible overbearing people. I have a job, a girl, friends, I get good grades, I dress my age. Standing up to them doesn't work and neither does good behavior. I just have to sit them out until I'm financially independent.
>>
>>1513174
Or just change the existing latch out with a locking one. But if anon's parents are truly asshats they will just pop the hinge pins anyway.

Get a lock box, fill it with rocks, put note inside that says "nosy fucker ain't ya", hide it someplace obvious. Wait for questions. profit.

and if all else fails, enlist. Free room, board, education, and get to see the world. Though I will say that basic sucks. But once you are out it is a great thing for the resume.
>>
>>1513166
This >>1513199

You don’t even need a deadbolt. Get a door handle with a key and you should be able to swap them out within 5min with a single screwdriver.
>>
>>1513164
Their house their rules bud. Try to tolerate it until you move out

With pre primed skirting do you reckon i could paint it with a spray can or do i have to use a brush? Im thinking hi gloss
29 replies and 1 image omitted. Click here to view.
>>
Paint retailer here. Use a foam roller or low nap velour roller if able. Most people use semi gloss finish for trim and mounding. You can brush as well but will take much longer
>>
>>1509130
Not who you were responding to, but in my experience a lot of older folks use semi gloss on walls. I’ve noticed recently that what they call semi gloss is typically satin nowadays
>>
>>1509059
use a small roller Anon,
Don't use spray cans
>>
>>1509059
Use a brush. Overspray and runs are a bitch on trim and when using gloss it will show that much more (semi gloss is what I would use). Do not use rollers, you will be unhappy if you do. Tape is your friend and will save you time and cleanup frustration.
>>
>>1512657
i mean she is right

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Anyone know what this is? What it does?
7 replies and 2 images omitted. Click here to view.
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>>1513037
I think it more than clamp itself to a table tho
>>
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how about these
>>
>>1513066
These come with sawhorses bought at the store, to hold odd shaped items.
>>
>>1513047
ok, its a double-screw double-grip tandem clamp
is that make you feel better?
>>
>>1513035
isn't this the transom clamp from a little outboard motor?

There's a ~30 sq ft puddle in my backyard that is about 2 inches deep. What's the fastest way to dig it around 6 to 12 inches deeper? I can only use a shovel cause am too poor to rent an excavator. I am making a vernal pool for local wildlife if anyone is wondering why.
>>
>>1512870
SQRT(30) = 5.4'

yeah, just use a shovel
>>
>>1512870
if you plan to dig by hand with a shovel, you can make the diging easier by "softening" the soil first.
do this by soaking in water (moist soil generally easier to dig into)
or attack it with a pick or something to break it up somewhat
then dig with shovel
>>
>>1512870
$100 and 2 guys named Jose, Pedro, or Miguel at Home Depot will do the trick
>>
>>1512870
Take the material you dig out, and raise the height of the surrounding rim.


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