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/diy/, I've never had a black eye.
I've had many different bruises in my life, but never in or around the eye area.
I want a black eye, /diy/.
How can I give myself one without damaging my eyes? I like my eyes and seeing stuff with them, but I guess I also have a thing for self-harming to an extent, and I think bruises look nice.
How can I damage the tissue around my eye without harming the eye itself?
Can't find poles on electromagnet
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I built this electromagnet as a test using an AC to DC adapter as a power source. However, even though it does attract things, I can't get it to repel. I have a permanent magnet, and no matter from which of its sides I put them together, they always just stick to each other, never repel.
As I understand, the electromagnet poles should be on its ends along its length, right? So what could possibly be causing this? Does it have to do with the electromagnet strength?
3 more posts in this thread. [Missing image file: Dr Pot.gif]
What's up dudes
I'd like to make a remote control for my light switch for my room., I'd love to be able to be in my bed and turn off the lights, but I'm not sure exactly how to go about doing this. I was hoping some of you guys(or girls) would be able to shed some light on what might be entailed, and I hopefully see if anyone's got any links to anything related I could read up on.
I haven't really delved too much into this project yet,only thinking it up some 15 minutes ago or so, but I figure I'll need to do an RF transmitter and receiver, probably running off of a 12V or 3V battery, but I'm not sure exactly how to do the actual switching of the light.
Would I have to use a relay? I'd like to keep the mechanical action for sure,and just add the RF receiver in addition to that.
I guess I'm hoping that someone can kind of point me in the right direction, like I said I haven't looked into it too much, and I'm thinking I'll be able to find a fair amount of info on the rf transmitting(although again if anyone's got any links they could share,I'd be much obliged). I'm more curious as to the actually switching, so if anyone knows anything about relays and shit, what the hell do I have to do here? All I've found online so far has been commercial products tht cost way more than I feel like spending on laziness.
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I'm currently working on an early project and I wonder about feasibility.
Setup: Stepper motor (type not sure about), one gear attached (weight 10g), turning another gear (10g), ratio 1:1, turning a sleeve bearing with minimal friction.
I want that stepper motor to turn something mounted on an axis from 0° to 63° within 0.03s (+/- 0.015s) via gears (1:1..2:1 max gear ratio, that means either direct or slower).
Within this angle I want to have at least (can always be more) a dozen steps so I can adjust the specific angle.
Many stepper motors have steps of 1.8° -->
63°/1.8°=35, so at least this will work out.
The friction of my simple gear will likely be higher than the friction of what I am moving. Both are rather negligible I'd say. Something similar to a proper sleeve bearing, maybe.
So what I worry about is inertia, unfortunately I suck at this part of physics and stepper motor electronics. The gears have a weight of ~20g and are attached with proper ball bearings.
The application needs to be mobile and compact. That means powered from a couple of eneloops and of 40mm width or lowered.
I can provide up to 35V@4A via a switching amp if needed (although don't expect it to be ripple free at this much current).
Will a stepper motor be able to accelerate two 10g gears (one attached to the motor, one to my axis mounted piece) to 35(?) 1.8° steps (or 63° with at least 12 steps) within 0.03..0.045s? What kind of stepper motor should I be looking for?
From what I understand about steppers so far is that they need a ramp to accelerate, but I'm not sure if I'm already within the need for such a thing, or if it's even doable. Anyone can help me out?
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Hey /diy/ , newb here.
So i've been inspired by medieval Assassins and Assassins creed. I want to make leather armour, that's unique. But i have no idea how to deal with leather, nor metal.
I don't want to buy already made armour, because i wont be able to fix it later if i ruin it somehow.
Please /diy/, give me a start.
( Not full leather, since i am acrobatic and "sneaky" type. I could also put in a design )