Archived threads in /diy/ - Do It yourself - 613. page

I is current, not "intensity." The load, ie. the resistance, determines the amount of power drawn from the supply, assume constant voltage. Pretty much every power supply you will encounter is intended to operate at constant voltage. Notable exceptions include battery chargers, because batteries should be charged at constant current, not constant voltage. But this only applies to ones the charge the cells directly, not phones and laptops and things.

No computer power supply is going to be able to source 400A of current, and good thing, because you probably would have killed yourself. It likely has current limiting circuitry so it doesn't blow up when some idiot like you tries to short circuit the supply and turn it on. If it drew 400A through a resistance of 0.03 ohms, you'd be dissipating 4.8 kW in the wire; you already mentioned that your supply was 300W max. A well designed supply will do what yours did. If you were less lucky the supply would be toast, possibly with an electrical fire if you were less lucky.

Use heater element wire, like nichrome or something, which is higher resistance.

>>947619
Obviously I haven't done it with a computer PSU. I tried a modem PSU that probably doesn't have more than 1W.

I am trying to understand how it is possible that despite trying to shortcircuit (which is what you more or less do with a hot wire foam cutter) the modem charger it allow more current.
Since you said that normal power supply units normally operate at constant voltage, in this case 12V. Supposedly if I reduce the resistance(shortcircuiting) I should get higher amperage.

measure the voltage at the output of your power supply as you short it. it will be very low.
P=V*I
if any of V or I is low, the power will be low.
the keyword here is internal resistance of the power supply
most of the voltage drops internally

>>950333
>408 watt motor
>20 amp hour battery 20*12=240watt. (Briefly, not actually for an hour.)
>50W peak output.

290w of power at your peak solar and peak battery, and that falls off to almost nothing after the battery is dead. That's not even full power of your 408 watt motor. You won't be able to charge and move with it, you could spend 4 hours in peak sun charging the battery, and then get an hour of movement at half power.

>>950357
its a 20AH battery; it can run at 240W actually for an hour

>>950333
1.21 gigawatts

>>950272
>386
Into the e-waste with it.

>>950274

fag

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>>950272
Yep. Need to be replaced asap. Just solder a new batterie between the joints. Also clean the pcb with Isopropyl alcohol (also asap).

Pic related: a brand new batterieholder. Also avaliable for vertical holding.

>>950261
Ever heard of "how it's made?" It was a short lived show about how different things are made. Kyaks, guns, cd-roms, cheese, candy, tires, toilets, etc.

I think there were only 20 seasons or so.

>>950284
Never heard of it, thanks a lot will check it out.

Here's the Japanese show about making stuff, for people like me, who can never get enough.

https://www.youtube.com/playlist?list=PLOEDIkStOhJftis3UgRt3_v6VezLwxKod

light it on fire

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>>949112
Stick it up your butt

But honestly a few days maybe, what kind of humidity/temps are we talking about?

>>949112
You might consider throwing it in a trash bag with a container of damp rid. Just don't let any of the desiccant touch the wood, but sealing the guitar and the open container of damp rid in a bag for a day or two should dry it right out.

>>948990
>W30 L32

I would suggest starting with more material around your waist. Probably closer to 42.

>>948990
If you jeans are wearing out after 3 months it isn't the quality but the excess stress you're putting them under. Maybe you should wear the correct clothing for the job you are undertaking.

>>948997

I wonder what the hell OP does to wear out the crotch in 3 months.

What about the spray on bed liner for pick ups?

>>950334
concrete texture stamp

1. build structure out of wood
2. cover climbing side in hardware cloth
3. trowel on concrete
4. use texture stamp

>>950334
Should look into that anti-skid grit they add to floor paint. That stuff stands up to alot of wear.

>>950214
please can we just have a board for vapefags already
why shit up a perfectly respectable board with this cancer?

op is not even asking about how to build a vape
not that that would be acceptable because its disgusting shit for common plebs

>>950214
I have to agree with
>>950215

I vape, but this isn't doing anyrhing yourself, so your thread has no point. Just do your research, then buy.

However, I'm looking to bump my coil game up. Does anyone have recommendations for brands of nichrome-80? Why is that your preference?

>>950215
I recommend the following board for vapers: https:\\www.4chan.org/banned

>>950173
I think you should start a thread when you have actually made something otherwise it is fucking meaningless

Wooden as in fancy or "I don't care, it needs to work!" You'd only need a bit of space inside a wooden box for cooling. The rest is up to you and your available tools.

A modified mini atx case would look smart.

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Hard to tell but there's a wood "block" embedded in the cement that the original was drilled into. Tried kicking it back together and smacking it with a hammer.

>>950166
you need to remember newtons laws, for every action there is an equal but opposite reaction.
therefore, since the damage was done by backing the car into it at an angle, the only option to fix it is to back you car into it at an opposite yet adjacent angel.
Since you altered the situation by kicking and hammering it you need to estimate the amount of change you created.
Id estimate it to be 5%, so my advice to you would be to back into it only 95% as hard as the first impact at the correct angle.

>>950189
Pretty much this.

Lets see a pic of the bumper for fun.

probably a half round alum cutting file

i specify alum cutting because the scoops on them have better clearances for sticky materials such as aluminium

You could heat the outer tube up then push the inner tube in to it. Unless you need them to slide of course.

Rat tail file would be the cheapest
Flaring tool would be the best

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OP, you aren't even trying.

>>948711
first edition is totally different

Synth 101/10

Are you dragging or whipping and pausing?

>>947849
Whipping and pausing, I don't have much trouble in the flat position mainly just vertical and overhead.

On the vertical watch your rod tip-- keep it even - do not let it fingernail. Vertical is the toughest to get consistent at because of the lack of vision on the puddle. Pay attention to the sound your rod makes. As for overhead, it should be just like flat with 6010. Watch your heat.

>>950095
microfibre

>>950095
Fibreglass filter media.

A bucket of sand.

>>950113
>Fibreglass filter media
will it hold up in water straining small amounts of dirt? meaning will the fibers fall out of the mesh?

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>>949895

Shit I forgot the link

http://ultraculture.org/blog/2013/11/27/build-dream-machine/

>>949896

>Brion Gysin’s Dream Machine is a device that can create and accelerate altered states of consciousness without the use of hallucinogens or hours of nonstop meditation.

Uh yeah sure whatever.

Literally just Googling "78rpm motor" turns up suitable results. If it doesn't need to be exactly 78rpm, pretty much any geared motor will work.

>>949899

>A light bulb is suspended in the center of the cylinder and the rotation speed allows the light to come out from the holes at a constant frequency of between 8 and 13 pulses per second. This frequency range corresponds toalpha waves, electricaloscillationsnormally present in the human brain whilerelaxing

From the wiki. William S. Burroughs famously built one and showed it off to a lot of his inner circle. Regardless, thank you anon, that's exactly what I was looking for, have a pleasant day.