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Archived threads in /diy/ - Do It yourself - 203. page
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File: hqdefault.jpg (17 KB, 480x360) Image search: [iqdb] [SauceNao] [Google]
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How To Free Energy
60 replies and 6 images submitted. Click here to view.
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>>922889
Moving magnets, nothing is for free tho, not even immigrants.
>>
>>922889
That's not 'free energy' OP, that's a transducer; you're converting mechanical energy (moving the magnet) into electrical energy, by inducing a current in the coil.

Now, if you want to play around with something, try this: Put up a long-wire antenna outside your house, as high up as you can get it. For bonus points, tune the length for 1000kHz (middle of the AM broadcast band). Sink a 6-foot ground rod into the ground for a good, solid earth ground point. Connect that to the lowest voltage...
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>>922893
What if we poison the water in mexico so that it genetically modifies all newborns so that they are slightly magnetic. Then, instead of building a wall, we build a massive coil they have to walk past to get into america, thereby generating electricity. I know it's not "free," but it's free for us.

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hey /diy/
so my goal is to build a plane, i have no problem with that so far.
however i'm not familiar with the regulations.

can i fly this plane ?
37 replies and 9 images submitted. Click here to view.
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>>927933
Yes you can fly it anywhere, don't you know china is a land of freedom?
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>>927937
u_u
i'm not Chinese, that pic isn't me.
>>
>>927939
You can't fly a chinese plane outside china

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Each year hundreds billions of plastic bottle ends up in nature. Medias afraid of loosing advertising fees try to under estimate repercussions.
TIME TO FIGHT… UPCYCLE
Please share this video :
https://www.youtube.com/watch?v=f1Nm7xP4sxg
5 replies and 1 images submitted. Click here to view.
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>>929228
dumb as fuck
>>
gb2 leddit hugbox, hippie
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>>929228
green bottles are the worst for growing plants in, plants can't use green light for photosynthesis.

This mean he did not talk to someone who actually knows shit about plants, pretty big chance it will not work.

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I have a light with a grounded plug that I want to use on a timer I have on hand. Problem is the timer only accepts two pronged cords. Could I use one of these cheater plugs and connect the ground tab via ring terminal to a grounded cord plugged in close by?
4 replies and 1 images submitted. Click here to view.
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>>930326
Yes you could.

Portable appliances aren't covered by electrical code, so the world won't stop spinning should you do that.

One socket ground is as good as any other.
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>>930330
Thank you, that's what I figured.

I'm making a DIY light/reflector for some plants and because the reflector is going to be made out of metal duct I thought it'd be a good idea to ground it. I could just stop being cheap and spring for a grounded timer (like $12), but where's the fun in that?
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>>929820

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The price to buy a wind mill to generate electricity is outrageous. I don't understand why they cost thousands of $$$$.
Why cant I hook up an altinator from a car to a wind mill to charge a battery?
It seems like a simple idea, and I have the ability to make the wind mill.
38 replies and 4 images submitted. Click here to view.
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>>928162
using a windmill to generate electricity is going about it all wrong op
you should be using a wind turbine to generate electricity.
>>
if you wanna connect the blades directly to the alternator, it wont work coz the rotational speed is too low. you'd have to rewire the alternator to compensate. however if you have a windmill, then presumably you can use gears or belts to obtain the necessary speed, so it could work unaltered.
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>>928162
Because they're low production volume items and a car alternator that is made in the millions still costs like $300.

http://www.canadiantire.ca/en/pdp/coleman-400w-12v-land-and-marine-wind-turbine-0740213p.html#.VpL8Lb8jxpk

Just because you can put together a system from scrap doesn't mean the company building a commercial product can too.

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I've come across 200 or so of these circuit boards(?) through a fuck up at work.

Anyone know if they're useful in any way or have any value?

Should i just throw them away?
7 replies and 1 images submitted. Click here to view.
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>>929870
They're e-waste. Not even sure if you could get copper value out of them for all the work it would take to get the copper cladding off them.
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really cheesy nerd wall art, or keychains.
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>>929878
>>929885
Thanks, into the trash they go.

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I got some 40 watt four foot shop light enclosures I intend to use to replace some 100 watt incandescent bulbs in my garage. The enclosures have grounded plugs, however light bulb adapters have no provision for ground. I know there are ungrounded plug adapters with a ground attachment point, but I'm trying to do this without running a grounding wires.

Does an LED DC converter need to be grounded long-term?
28 replies and 4 images submitted. Click here to view.
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its not the most dangerous thing you can do. if you're worried, just make sure you unplug it before changing your lightbulbs
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>>929820
How about you just do it right? One of these costs $5 and if the boxes are grounded, like you claim, its a 2 minute install.

Or you could just replace the old fixture with a standard outlet. Its probably a standard sized 4 inch box behind the fixture.
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I dove into a project and got about 75% through it before realizing I have no idea what I'm doing. The simple version is I need to design a small pcb with the following I/O:
- 3 logic level control signal inputs (whatever gauge, probably 22),
- 12V source (maybe. I could connect it directly to the 12V output wire) (18awg, up to 6A)
- ground (18awg, up to 6A)
- 12V output (14awg, up to 6A)
- 3 signal outputs (14awg, up to 2A each)

So what is the best way to connect each of these to the board? Something disconnectable would be ideal, soldering 14awg directly to a board just seems like a bad idea.
12 replies and 2 images submitted. Click here to view.
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>>927081
terminal blocks if you want to screw in wires and don't want connectors

http://www.digikey.com/en/resources/connectors/terminal-blocks

or rectangular connectors if you're never going to change the wires (buy mating pairs of board and wire connectors)

http://www.digikey.com/en/resources/connectors/rectangular-connectors
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>>927081
headers for logic input, screw terminals for power and output.
>>
Do I need to make any special considerations connecting the screw terminals to the board?

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Hey /diy/ck-heads

>got an area rug for my tiny apartment
>maybe going to set it up like this
>Problem is, I'm an idiot bachelor
>never had an area rug before

Is there a better way to set it up?
I've heard it shouldn't touch any of the walls, but it might be okay to be against the back wall?

Dimensions
>Room 140" x 111"
>Carpet 129" x 94"
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2 replies and 1 images submitted. Click here to view.
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is this a joke? you put it wherever your feet would normally touch the cold floor.

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Hey /diy/

>TL;DR Help me learn Synths 101

I'm going to be starting up a synthesizer project this upcoming semester (hopefully more than one) and am looking for the best references to learn about synth design, development, and construction.

As a physics major I already know a lot of the basics of electronics and circuits, but that's mostly stuff like V = IR and what not. I don't know how any of that applies to actually generating sounds like a synth does.

My university apparently has a collection of Bob...
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5 replies and 1 images submitted. Click here to view.
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>>930061
You basically need to learn about RLC circuits and how the charging/discharge changes waveforms. Frequency modulation can be easily done using a 555.
>>
You might like this series of articles: http://www.soundonsound.com/sos/allsynthsecrets.htm

It's older, but the fundamentals don't change.
>>
>>930079
>http://www.soundonsound.com/sos/allsynthsecrets.htm

This looks super helpful, will definitely spend some time looking through these articles

>>930072
I've been introduced to RLC circuits through E&M and Diff Eq, but am clueless on the practical application of them in synths (i.e. how the charging/discharging changes waveforms).

Care to give a brief explanation?

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I'd like to know if anyone has experience with isomalt sugar?

I'd like to cast a slab of white non-translucent isomalt (about 55 per 80 per 3 cm). I found online that Cakeplay makes white isomalt ready to be melted in the microwave, which would be easier to use, but it's pretty expensive and I need lots of it to fill my cast.

Does anyone know how I can produce a great quantity of white matte isomalt with a limited budget?
4 replies and 1 images submitted. Click here to view.
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>what is pulled sugar
any reason you need it to be made of artificial sweetener, flyboy?

just make pulled sugar, add food grade white pigment, press down into mold.
>>
>>930012
Actually I don't care if it's sugar or not, I'm just trying to produce a slab which needs to be opaque (and possibly shiny) and that could be destroyed if rained upon or exposed to water.

I found isomalt, which seemed to be the easiest way with to produce such an object. But any other ideas are welcome.
>>
>>930015
Pool salt is cheap.
Theres a recipe for mixing talcum powder, pool salt and ethylene glycol to make rigid water soluble casts here. http://www.jmst.org/fileup/PDF/2009196.pdf

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http://brainlubeonline.com/clone/toc.html
2 replies and 1 images submitted. Click here to view.
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>>929988
why is it barely running?

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I'd like to know if anyone has experience in it and also if these instructions are ok.
bestcasebeer DOT ca/instructions/
5 replies and 1 images submitted. Click here to view.
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Also, post your beer making experiences.
>>
best i can say is don't be a cheapass. beer brewing is a hobby where you spend a good amount of money - to not save any money. _you don't do it to save money!_ if you try to save money it will not be fun.

for example: get a decent brew pot - one that's a little too big for what you need. one with a spigot perhaps. if you're gonna do this for for the rest of your life why not. seriously - look at the videos like "huehue here's how you user your new cheapass kit!" - look at that big ass lovely brew pot they use that doesn't come with...
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>>930008
Thanks a lot man.

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Long story short, my buddy is about to move into our apartment and live in our walk-in closet

The one thing he really hates about it so far is that the lightswitch is on the outside of the closet door.

Whats the easiest way to allow him to use a remote or something to turn the light on and off from inside the closet?

I tried amazon but "light bulb remote" only brought up cheap looking stuff like pic related

thank you /diy/!
8 replies and 3 images submitted. Click here to view.
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>>929754
>light bulb remote
this

or just use a floor lamp/table lamp with its own switch

you are welcome
>>
Lutron Maestro wireless dimmer. Make sure to not get the RF variety as that kind needs line of sight to operate. Make sure you understand how to install the switch correctly, and research if the switch requires a neutral conductor, as older building wiring usually does not have a neutral at the switch.
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Depending on the light switch location, I would just just a hole on the inside wall of the closet, right behind the light switch, rotate the box and switch to be inside the closet, then put a blank plate over the hole on the out side.

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>>929644

its illegal according to US law. and as per the rules of 4chan, it isnt allowed here as well. /diy/ isnt here to help you with illegal activities.
>>
>>929645
actually they are legal to make, just not for sale.

https://transition.fcc.gov/eb/jammerenforcement/jamfaq.pdf
>>
>>929662
or use

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