Op
What aluminum alloy for head gasket 2016-08-18 18:51:45 Post No.1040534
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What aluminum alloy for head gasket 2016-08-18 18:51:45 Post No.1040534
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What aluminum alloy for head gasket
Op
2016-08-18 18:51:45
Post No. 1040534
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Want to make pic related. 0.02" head gasket. Appears aluminum. Would be produced as die stamp. What alloy should I use? Needs to be ductile both for stamping plus installation, where it needs to "squish" to seal head to piston. 2 stroke application.
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Standard 6061. Might need to heat treat it to prevent warping.
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More concerned with softness for stamping than warping. These get squished between two castings; it'll stay flat in design position.
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>>1040534
The fuck kind of 2 stroke engine uses alum gaskets? Especially since the blocks themselves are made of aluminum, that sounds like a bad idea.
I've seen perforated brass with fibrous rubber molded in, also seen ones that are integrated with a heat shield, never seen aluminum.
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How would one go about making high quality lettering in a press that would reflect nicely into a tablet pressed out of powder
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>>1040518
http://books.google.com/books?id=Wq9IAAAAMAAJ
also, you may want to pursue a book on engraving techniques.
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acid etching?
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>>1040518
Mill lettering out on a metal stamp.
Hi /diy/, I'm hoping you can tell me why OP is such a fag here. Tldr : I'm having trouble switching a thermoelectric cooler with a MOSFET and an arduino
Long story: I'm trying to switch this tec unit with an arduino, but I'm running into a couple of problems along the way. My idea was to read an analog value from a pot and use that to set the duty cycle of PWM on an output pin, and ultimately use the PWM signal to switch a MOSFET and apply power to the tec. So I setup some serial.print commands to view the analog input, the analog input divided by 4, and the state of the output. When the tec is replaced with an led then everything works great. The pot works, the divide by 4 works, and the output works. When I plug the tec in to the circuit then I start getting garbage data and the performance of the TEC is unpredictable. It's off for a few seconds, then it is on, then it is off, then it sticks on for too long and starts overheating, etc.
So then I figured the PWM output is wonky, so I manually configured a duty cycle using code. I changed the output to digital, then wrote a little code so that it would check the pot value and tec state every milisecond or so, and it would stay on for the first part of a second and off during the last part of a second. Again the code worked as expected, but the tec was unpredictable. It would switch correctly at first, but would end up sticking ON and beginning to overheat. (I should mention that I have heatsinks and multiple tec units to play with).
Anyway, after manually configuring the duty cycle and it still not working, I figure my problem is somewhere else, which is where I was hoping you can help.
*Is my MOSFET circuit configured correctly?
*is 5V enough to reliably turn the mosfet on and off? (It's actually more like 4.7V coming out of the digital pin on the arduino nano)
*is there something that I don't know about TEC units? (Are they inductive or something)
*is there something else that I'm entirely overlooking?
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>>1040514
Forgot to draw the potentiometer in the schematic above, but it's connected to the 5v (really 4.7 volt) pin on the nano, common ground, and the wiper is connected to one of the analog pins. Again, the pot seems to be working correctly according to the serial data output, but I wanted to clarify that it's there but not in the schematic.
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http://electronics.stackexchange.com/questions/118536/thermistor-control-of-peltier-voltage-with-arduino-for-dslr-chill-box-project
I think this will help you figure it out. I don't know much about this subject but it seems like thermometric coolers don't like rapid on/off. LEDs don't give a crap and their resistance isn't changing so I think that's why your circuit works as expected with the LED but not with the cooler.
Also you should post this in /ohm/ general thread for more responses.
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>>1040514
>*is 5V enough to reliably turn the mosfet on and off?
absolutely not
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I am a person living in Finland and it's becoming increasingly dark every day. A time of super darkness is upon us and I hate it that I can't see my dog in this wintery wasteland.
I already have a reflector vest (left) but it's shit because it does nothing unless a light is being shined directly on it. I bought a LED strap you can attach to the collar but that is shit too because it's a small contraption and although it provides a light, it's small and dim. You can see where your dog is going sure but you can see nothing around it and it's infuriating.
How do I make a winter-durable LED vest (something like the right pic)? My dog likes to play in the snow so obviously it has to withstand wet and cold. Not too sure how to power it either, as I don't want my dog to become a walking lithium bomb.
I don't mind a nigga rig, so it doesn't have to be aesthetic. Just durable and have a shitload of white LEDs on it, preferably adjustable so if I miscalculate something and it becomes blindingly bright.
tl;dr: how to turn my dog into a lantern?
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>>1040464
Put an led strip into a plastic bag with a battery. Turn it on and tape it to your dog
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>>1040464
Electroluminescent tape.
Spell out 'DOGE' so people know what it is in the dark.
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They sell LED strips by the foot. You could power them with a 9 volt battery. Not sure if you'd need a resistor, though.
Line the seams of the dogs vest with the strips. adjust the brightness of the LEDs with more or less resistors.
Anonymous
Implement Battery driven LED's and sensor? 2016-08-18 11:47:26 Post No.1040402
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Implement Battery driven LED's and sensor? 2016-08-18 11:47:26 Post No.1040402
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Implement Battery driven LED's and sensor?
Anonymous
2016-08-18 11:47:26
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Hi /diy/nosaurs, dumb fag here.
I want to place rgb LED's in the googles, have it react to my voice and have it all driven through batteries.
Google has not been my friend on this.
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I have time, money, tools and some soldering skills. I expect I have to tinker around with circuity to get this to work....
I just don't know where to start
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For the LED' I was thinking of perhaps using this "5050 16-bit rgb led ring". The shape and size is convenient but I worry that the light distribution will be wonky.
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>>1040410
Opps forgot the pic
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hi good day how can i repair this lipo? it has cut in its soft case. any advice? im planning just heatshrink it. will it be enough?
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As long as the cut hasn't damaged or scarred the cells themself you should be fine.
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>>1040390
the cut damage the silver part. i dont know if it is a cell already.
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>>1040394
In that case i would just heatshrink it. Make sure the battery doesn't get wet and yoh should be fine. The worst this that can happen is the battery could get how and leak out the electrolight that is inside the battery.
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Are there better products out there besides jb weld for when you need to fill a void and cut threads into it?
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>>1040358
ER70S-6
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Helicoils depending on how large the hole is.
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A lifetime of abuse has ruined the skin on my fingertips.
How do I fix my hands so that i don't look like a mutant anymore? Also it feels like I'm wearing a second layer of skin because the surface layer is losing sensitivity.
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>>1040260
Wait like a year without reking your hands you should regain SOME sensitivity... They will never be new again sorry...
Grandmother worked with chemicals all her life and even after years of retirements she had rekt hands...
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>>1040263
There has to be some magic cream that will fix this organ that completely regrows it self like every month.
Maybe some aborted fetus cells made into salsa.
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>>1040260
Coconut oil. Not the liquid stuff in the cosmetics section. The solid stuff you can get for $6 at the grocery store.
A little bit goes a long way. Apply a dab after you wash your hands or after you shower and before bed.
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soup /diy/? I recently purchased a piece of land, cleared the property and have well water and septic. I've been looking around on torrents and such, trying to find a list of very easy to build homes that are up to code with USA building standards.
Blueprints are designed by engineers, and include all the details for the permit office to approve and inspect the build in progress.
I'm a project manager for a roofing company, so I have access to all the materials, tools and labor I will need.
tl;dr where can I get free blueprints for simple 1500-2000 sq ft. homes?
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>>1040199
No where? Who the hell is going to design you a home for free?
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>>1040203
I don't need custom engineered you ding dong. scanned plans from a pre-existing builder from lower priced developments would work.
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>>1040205
Literally three seconds off googling
http://www.thesmallhousecatalog.com/afewsmallwords/no-32-the-alberta
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I decided to make a book last week, took me like three evenings before I finally finished it (I got lazy by the end so the cover is kind of crap, too bad). It's actually not that hard if you have all the right right tools from the get go.
Any bookmakers in here?
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Here's another pic. I documented the steps somewhat (roughly), if anyone's interested.
I'm not an expert, obviously (I mostly relied on youtube videos to make it), but I can try to answer questions.
I know /diy/ is perhaps meant to be more for the heavy-duty stuff, but hey I made it with my own hands so it counts too
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>>1040127
post pls!
I am always up for a tutorial in bookbinding, I have many run-down books
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>>1040121
This is something I really want to get into.
Am thinking of binding my own PhD thesis
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Is this thing even worth cleaning? I feel like its so far beyond that but I don't know what to do. I just moved into this shithole in southern Arizona and it's hot as fuck and I don't want to be without an AC unit. Should the landlord cover something like this? What do?
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>>1039979
All the shit that fell on the floor when I opened it up.
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>>1039980
I've also had a sore throat for pretty much the past week.
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>>1039981
Does anybody know how to keep the insides of rubber gloves dry even when you're washing dishes? Perhaps some sort of powder?
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>>1039978
I find a liberal sprinkling of lye does the trick.
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>>1039978
get ones with longer sleeves
or
don't sweat so much
or
don't splash water everywhere so that it goes down your gloves
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I'm going to try this stuff
So I want to make a shoulder mounted potato launcher and model it after this. Thoughts on how to do this??
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I've made several. Highly recommended you stay away from those stupid little red friction button ignightors and twist lantern lighters. They both have downfalls that make this a bitch to use.
I am partial to the $15 universal propane grill ignigtors from lowes. They are battery power push button and throw repeated sparks until the button is released. These aren't perfect but affordable.
Have yet to try stun gun ignightor but they seem to throw abundant fire wayyyy better than anything else.
Good luck anon.
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>>1039963
I've revised my old tater gun with a $7 rechargeable eBay stun gun and it works wonders apposed to the red grill igniters and Flint igniters
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Could you potentially run one of these from a propane tank?
Anonymous
Laptop Battery Upgrade. 2016-08-17 04:45:37 Post No.1039804
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Laptop Battery Upgrade. 2016-08-17 04:45:37 Post No.1039804
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I was sent here from this >>56120712 post.
I wish to crack open my laptop battery and replace the worn out cells with NCR18650Bs because I doubt I can find a replacement battery with them in it. What techniques are involved with splitting open the battery in a reusable way?
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Fixed post;
>>>/g/56120712
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>>1039804
If you take your time you should be able to pry the top and bottom open with a small screwdriver or a knife. Search google and you'll find some videos of people doing this.
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>>1039804
Do you have a dremmel?
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What do I do in this situation, there's a big blob of water under that ceiling paint after a rainstorm. Currently have a bucket underneath it to catch the brownish water droplets.
Do I stab it and let it pour through?
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Yep. Paint is fucked either way.
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>>1039533
>Do I stab it and let it pour through?
This is what I would do, and then go outside and try to figure out what failed to let the water in.
But if you are renting and shit, maybe you should get the landlord to come over and see it. Might get them to work on fixing the problem when they see it with their own eyes
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>>1039533
Yes. if you dont it will promote more water damage. Pop it then start cutting wet drywall out