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File: acagra coa.jpg (106 KB, 880x617) Image search: [iqdb] [SauceNao] [Google]
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Me and my gf both love bugs. We'd like to raise some larvae into beetles, moths, etc. in our free time and taxidermize them when they pass on. Any fellow entomology buffs here that can recommend me books or pointers about this? I really have no idea where I would start.
14 replies and 6 images submitted. Click here to view.
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>>971429

1) find a beetle you like
2) look into the very simple care. usually just order bug, feed bug. They usually come with 'beetle jelly'

It's really that simple, for the most part. beetles are cheap and readily available, so is the food and substrate.
>>
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>>971429
can't help you with books, but here's what i was able to grow at home
pic 1
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pic 2

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See this Nixie tube thing? How do I do this with an Arduino?
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File: sport2.png (2 MB, 1414x2560) Image search: [iqdb] [SauceNao] [Google]
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if you use an arduino with enough outputs (20) then you can drive the 10 segments of each nixie directly, without any decoder. so you can do it by driving 20 high-voltage transistors using the trick shown here.

more info at http://renaud.schleck.free.fr/nixie.php
>>
>>971432
>http://renaud.schleck.free.fr/nixie.php

Thanks Andrea. But this sounds wicked complicated. Perhaps you could help me with something else. In the same gif, you see the charging/spooling up animation? Could you help me with that?

I was thinking of using a neopixel ring but i can't buy one here so i ordered one of these for experimentation. I trawled google but couldn't find jack.

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So I have this power supply that gives me these outputs.
Is there any way I can turn this into a -16 and a +16 Volts outputs?
39 replies and 9 images submitted. Click here to view.
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pls respond
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>>971388

Making the ASSUMPTION that the +16V rail can sink current as well as source it, simply use the 16V rail as GND. GND becomes -16V and +32V becomes +16V.

But that isn't a good assumption to make because odds are it can't, so...yeah, check first.
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>>971409

how the fuck do I check that?

File: timed power release.jpg (334 KB, 1436x924) Image search: [iqdb] [SauceNao] [Google]
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I want to make a Extremely fast & powerful flash for highspeed photography.
--- a "air-gap" flash, but using LED's

Is there something that can be programmed to release power for a set amount of time, from an input of a "ping" of voltage?

Full story i guess - i Have a Miops (sound/light trigger) for my flashes [which totally suck because they emit light for too long/ aren't very bright] via external 2.5mm to PC sync cable. I've also made a DIY 100W LED chip light, I want to have the Miops turn on the LED chip(s) On for 0.0004...
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14 replies and 2 images submitted. Click here to view.
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Arduino would work for firing the strobe I would think.

So you want LED so it can be low voltage / not electrocute yourself?
>>
you can certainly do this with wiringpi if you're able to use google and copy and paste simple code. i can't be arsed to read up on the miops so i'll assume that it effectively bridges connections when triggered.
you'll want to connect the miops across the 3v rail and a gpio pin so that it can be read as input. you'll then want to connect a suitable relay across the 3 or 5v rail and gnd, using another gpio pin as the trigger.
i would assume that an arduino could be used too or even a 555 timer chip if you want to really simplify it.
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>>971385
Dude, even normal "slow, not very bright" xenon flashes have their peak powers measured in tens or hundreds of kilowatts. Air gap flashes use even higher peak powers.
Sure, LEDs can produce more light per watt, but even then, a 100W LED running at 100W isn't going to do jack shit. You probably need to compromise on light output and still need lots of LEDs, overloaded brutally. Your electronics design problems will revolve around the LED drivers, their power supplies and the LEDs themselves, not around...
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File: 20160401_183124.jpg (2 MB, 3264x1836) Image search: [iqdb] [SauceNao] [Google]
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who /currentlypainting/ here?
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Beautiful toilet paper holder op
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>>971266
You didn't have to dip your brush that deep anon. Just the tip.
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>>971266
psst... multiple, thin coats.

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/g/ was of no help. How can I make a speaker out of head buds?
22 replies and 3 images submitted. Click here to view.
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>>971264

> what is an amplifier
>>
Buy an amp off ebay
>>
Buy a speaker off ebay

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I've been thinking of hooking up an electric motor to my bike. I wanted to buy this setup, however. My intuition is telling me that this gear ratio is absolute shit. What do you guys think? Would this be a viable option for an electric bike?
18 replies and 4 images submitted. Click here to view.
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You could get a motor that slides into your seat tube, it's a lot less visible and I've heard good things.
I've heard they assist well
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>>971230
It's a nice idea, but that seat tube motor is in fact not a motor, just a battery holder. And the has a motor in it.
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>>971338
I think it was a vibrator joke.

It doesn't take a genius to hook a motor up to a bike. You can probably scavenge the parts. Any old electric scooters lying around would help.

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I made this. Did I do good?
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My name's not even Wilson Huerta. It just happened randomly FYI
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>>971126
Nice paint it up and u have a scimitar looking thingy
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>>971129
Will tomorrow. Probably gonna give it to a younger relative.

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If I make a small case for computer parts about 5" squared (give or take) out of thin balsa wood and cover it in epoxy resin, will it be tough enough to stand a bit of rough handling?

I want it to look good, so my idea is to paint the resin on in layers with a brush and spray paint it. Good idea?
11 replies and 2 images submitted. Click here to view.
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It will not work. I am an RC enthusiast and have been building planes from balsa and glass fibre for 20+ years. Epoxy alone does hardly add any strength. Use it to laminate glass fibre sheets, and you are heading into the right direction. But it is difficult to get the glass fibres around the edges. I recommend plywood for a wooden case. If you stick with the balsa/glass fibre/epoxy way, be informed that you need at least 2-3 attempts before the result looks about right.
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No, why waste time gluing crappy wood with epoxy that's far more expensive. Use sheets of ply or if you're clever joined biscuit/T&G real wood then sand and paint.
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>>971074
Ok, cool, exactly what I needed to know, thanks.

I am planning to build a podium like pic related and wanted to use a frame and lighter wood because money. The podium bill pretty much be exactly this in different wood and with frame below. What wood should I use?
12 replies and 5 images submitted. Click here to view.
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The red us where shelves will go. blue is that it will be at an angle, not flat
>>
>>
>>971057
lighter wood.

tulipwood/poplar if you want it cheap and light.

ash costing a bit more

maple costs more or same as ash depending on location

there the three lighter coloured woods id choose.

and then just buy a veneered panel in the matching wood, groove the frame and fit .

if thats even the question you are asking...

so,
bought one of these little bastards a while back
going to build a frame and motorise it
mused at the thought of cutting it down the edges of the bonnet and around the windscreen and extending it then fibreglassing it using the shape to make the body wider

but trying to find a frame small enough is a bit of an issue,
i want to utilise the steering wheel kind of design,
i would really like to put the engine in the front and run a driveshaft to the back, but i dont feel like over engineering this is the way to go about it,

but in the way of weight...
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6 replies and 4 images submitted. Click here to view.
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>>971055
You're building a gokart. A cheesy and over complicated one but a gokart none the less. You're in for a bunch of fabrication. Your motor will likely end up being a horizontal shaft honda clone. Your "gearbox" will end up being a torque converter. Your drive shaft will end up being a long chain.

You say you don't want to over engineer it. You are are. Go to gokart forums and start poking around. Once you have questions about doing specific things come back here and ask.
>>
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>>971055
are you Koksal baba?
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>>971175
>are you Koksal baba?

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Hello!

Ignoring the April 1st theme joke and that probably no one is gonna see my post:

I have some standard aluminum cans (coca cola, redbull etc.) and I want to do something interesting with them, so I need some kind of light corrosive liquid that will slightly damage them/fuck up the pictures on the can if I let them soak in it. What should I use? Is there something that I can get over the counter in a drug store? Preferably the cheaper the better.
10 replies and 1 images submitted. Click here to view.
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>>971037
try some organic solvent (acetone, tolene, hexane,etc.)
they sell 0,5l of it for like $2
corrosives like acids or lye are better at dissolving the aluminum itself than removing the pain
>>
>>971045
you might need to soak them in it for a bit and them rub the paint off with a rug
or maybe not, they use very thin coat
also, do it outside and don't use plastic container
>>
>>971048
Is using a glass jar okay?

File: image.jpg (23 KB, 430x325) Image search: [iqdb] [SauceNao] [Google]
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What alternatives are there to velcro? I want something that will hold my light timber case against the back of a monitor and have the ability to remove said case for some tinkering any time I please. It doesn't have to be terribly strong, only as strong or stronger than velcro.
6 replies and 1 images submitted. Click here to view.
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Magnets
Suction cups
Gecko toes
This shit, whatever the hell it is: http://www.amazon.com/Sticky-Slide-Phone-Mount-Holder/dp/1395871035

Not sure any of that is actually stronger than velcro though. Maybe the magnets.
>>
There is a Dual Lock velcro-like product (also 3M I think?) that is comprised of plastic pegs that interlock to bond. Both sides are the same, unlike traditional velcro, and pretty strong. In an industrial application I found that it was stronger than the paint/finish on the wall when you don't pull it properly.

Have you considered interfacing with the VESA mounts on the back of the monitor? (if your particular monitor does not already use them for the stand)
>>
I use the 3M wall strips with the velcro - like side. The package should tell you the weight it's rated for. I use the small ones to keep my cats out of the kitchen cabinets. They aren't as strong as the day I installed them but they still take some force before releasing. They're sold at wally world or any hardware store.

File: IMAG01374.jpg (2 MB, 2688x1520) Image search: [iqdb] [SauceNao] [Google]
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Fuuuuuucckkkkk
27 replies and 10 images submitted. Click here to view.
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chisel goes the other way
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No going back now finish staining it in blood
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>>970904

Chisel went the right way, but hand was there.

>>970907

That is a morbid yet intriguing.

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Hey /diy/,
This may be something a bit more inclined to an art board, but since it's not really about making the art but coming up with different media it might fit here.

I currently work in ceramics, and have been experimenting with new and unusual clay types, such as a range of red to black to blue. Lately I've been looking at weird or wacky inclusions or even levels of material in the clay itself. What sorts of materials might you guys suggest to try in test tiles as inclusions? Currently I'm working with a fairly plain base of 45 OM4, 40 Hawthorne...
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13 replies and 3 images submitted. Click here to view.
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>>970866
I forgot to mention! I will definitely try any recommendations, and would be more than happy to bring back any results, with pictures of test tiles, notes etc
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>not throwing a feldspar-less kaolin/silica mix and firing at Δ20
P L E B
>>
I've seen paperclay which is pretty cool.

What would happen if you included iron filings or something like that?

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