according to official specs, not more than 500mA should go over the wires, but many devices seem to ignore that; and on my PC, that causes the mainboard to protect itself by simply switching off the powersupply.
are there any schematics about how to build a limiter for usb? eg, get an usb extention cord, cut it and solder in a few parts?
from what I know, I cannot just reduce usb to the data wires only since it needs the +5v/gnd for handshaking or such.
Hi /diy/nosaurs. I've joined some engineering/diy competition at my work, I'm curious as how would you guys proceed/what are your ideas.
The idea is to allow remote (280m end-to-end of the train) control of 4 pushbuttons, control of a lever (center of the red box) and monitoring of two control lights. So far I've got communication (LoRa on arduino inside the locomotive, LoRa usb-key on android with the operator), pushbuttons, LEDs monitoring and power figured out. My team have some ideas about controlling the lever, which may require up to ~40N... Comment too long. Click here to view the full text.
>>984067 Additional thoughts : We gotta be non-invasive, so we're gonna go with suction cups & magnets on a panel that holds everything mechanical. We aren't guaranteed the surfaces we're latching on will be metal so... Also it's not a commercial product or anything, not gonna be mass-produced outside of the contest. It's some internal PR stunt to show that we can create stuffs using 3D printing and "new technologies", nonetheless quite fun to join.
Alright so here is my idea. I want to start a podcast called the Antichrist monologues, where it's the Antichrist talking about his life and experiences. My problem is my headset microphone doesn't work all of a sudden, and I would know how to make a pop filter for my smartphone. So any ideas?
>>984058 I am so dubious that your attempt at producing an (edgy) podcast about the antichrist won't suck miserably, especially considering that the production budget is limited to a headset mic. Anyways, if you can find a block of foam and rubberband it to your phone that should help get you the sound you want. That, or you could make a ring out of a coat hanger and wrap a pantyhose. And please try not to fall into predictable cliches about being misunderstood and at the fringe of society etc.
/diy/, is spending 100 on a hakko iron thatll probably last a while more worth than buying a cheap station like the Aoyue 469? I plan on building the mcHF as the first project with the iron, so being able to do smd soldering well is necessary.
>>984012 If you want a good keyboard you need a PCB base, but one large enough for a tenkeyless will cost you about $800USD as a one off. So that rules easy assembly out, what you could potentially do is CNC cut some acrylic to hold the switches, another as your front and rear covers, then just point to point wire the keys to any uC or keyboard IC you can source for cheap.
if you are wanting a good fit and finish you're not going to be able to diy this, the scale and materials available don't lend themselves... Comment too long. Click here to view the full text.
>>983939 You might find some of your answers here, we have a few engineers. If your into 3d design there is a 3d board or two that might have some tutorial threads or useful sticky. I think one of them is /3/
OP, 3D printing is too much of a hassle to be viable when making a series of toys. It's great for making a prototype. But after that you might want to invest in some injection molding, or if you just want to homebrew resin casting. Really depends on what you want to do and i can't offer any real advice without more information.
I've made some /tg/ grade stuff miniatures and really small batches of figurines ~150 each when I worked for a games shop.
I don't think you can patent a toy, unless it's a new method for manufacture, but you... Comment too long. Click here to view the full text.
Is there anyone on here that has done this conversion? I know the main things to swap/modify are the spindle bearings due to them not being able to withstand lateral force very well. Also swap out the chuck for no run out when end milling. Anything else that you would consider important? Pictures would be sweet. I found a pretty comprehensive write up but I'm more of a visual person.
>>983657 >>983658 yes, see the slot running down the inside of it? that means it's only held in loosely with friction. super easy job.
put it in a vice so the outer molding is evenly supported, if you don't have a vice you can rest it on a socket that's large enough to catch the bushing, then just use a bar or another socket to drive it out.
>>983657 >>983658 looks like there is some room in that bush to be compressed, maybe with a vice? hammering it should also work but you would need a really stable base to work with, perhaps an anvil (or anvil like device, heavy stable and with a small hole in it)? gl
I'd like to make one of those slab cutting boards people make from 1 inch cubed cubes. Unfortunately, I don't have the money to go buy some nice pieces of wood to do it.
I do however have a wood pile of white oak, dried for about a year, maybe year and a half. I've also got a truck bed full of hard maple someone gave me yesterday, after trimming several limbs and a whole tree.
I can probably cut and find enough unchecked white oak to make the 72 squares I'd need for a 12"x12" board. Well, the 360, because I'd like to make 5.
With... Comment too long. Click here to view the full text.
seasonal drying takes about a year per inch of thickness, in all likely hood you're working with green lumber. use a moisture meter to check the MC then you can calculate expected shrinkage. the further from the pith the better. tiny cubes like that probably wont split if you glue the fuck outta it and seal it.
>>983587 It takes about a year per inch if it's just outside, you can speed it up quite a bit by going with a solar kiln type design (down to like a week per inch or less) or even just putting it inside where it won't have humidity swings. painting the ends with 4-6 coats of latex I've heard, yes, also heard good things about dipping the ends in a pot of melted canning/candle wax for branches and smaller logs (so they fit in the pot). Or there are commercial products. it'll reduce though, not prevent. Also,... Comment too long. Click here to view the full text.
>>983511 this, you may as well literally put one solar panel up or 20. That panel is doing bull shit to charge all those cars. They are getting their juice from the grid.
For business know how, you need to be snake-oil salesman tier. For technical know how, it's not much. It's high amp commercial shit so you should just hire an electrician anyway for liability purposes, you don't want to buy anyone a new car because the station caught on fire and fell on it because you used the wrong sized wires.
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