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- hydranix commented on ilpug's instructable How to Supercharge a Cheap Lighter
- hydranix commented on HazzWold1993's instructable How To: Resonant Microwave Oven Transformer High Voltage Supply.
No, do not do this, you shouldn't try to regulated a MOT's output voltage by regulating the input voltage.
View Instructable »Primary is input, secondary is output. Simple as that.
- hydranix commented on Grathio's instructable Choosing the Resistor to Use With LEDsView Instructable »
Do not ever use LEDs in parallel. The cheap chinese LED lights you're referring to are unreliable and can fail if given enough current. Try to use the light with rechargeable versions of the batteries it requires (they can provide much more current than regular non-rechargeables). You'll find the LEDs eventually burn out.Even if using LEDs all manufactured at the same time, they will not have a consistent resistance across them. Further, the resistance of an LED changes dramatically with thermal conditions. If one LED was warmer than the others it would have a lower resistance. It's would pass more current, and heat up even more...This is why we use an series resistor with LEDs when current is not constant. It mitigates most of the unpredictable properties of LEDs.Proper parallel LED circ…
see more » - hydranix commented on Drunken Woodworker's instructable How to "Weld" Aluminum Without a Welder
In sorta layman's terms, a weld molecularly bonds the metals into a single joined piece. Melting a dissimilar metal between the two pieces is just a simple solder joint.
Butane can work but will be more expensive as you'll (quite a bit) use more gas to get the aluminum to melt.Propane works and will be cheaper than butane, but still will require quite a bit of gas, unless you have an oxygen fed torch or a powerful air blown torch,For a torch like in the picture (no oxygen or blower) you'll want to use MAPP gas (yellow can) as it burns much hotter and will melt the aluminum using far less gas and cost much less despite being a more expensive by weight.
View Instructable »Galvanic corrosion. A tiny piece of less noble metal, a sacrificial strip so-to-speak, in electrical contact with the metals you intend to protect will do just fine.
- hydranix commented on amalkhan's instructable How to Distill WaterView Instructable »
Flourine is very important for our teeth. We have a layer of stuff protecting our teeth and it's called apatite. This stuff is easily dissolved by acids, like in carbonated drinks and in a lot of candy and other things we indulge in too often.Flouride ions bind with the apatite on the surface of our teeth and create Fluorapatite.Fluorapatite is much more resistant to acids, and also naturally kills bacteria it comes into contact with.This is exactly what allows us to keep our teeth beyond our 20s or 30s (which they were evolutionarily never intended to last beyond).If fluoridating water actually showed links to health problems, and the science was real and reproducible, then there would be no reason to continue adding it. Conspiracy theories aside...
- hydranix commented on Plasmana's instructable Make an Ultra Simple High Voltage GeneratorView Instructable »
use he pwm signal to drive a transistor to pulse the battery
- hydranix commented on WesDoesStuff's instructable Ultimate Guide to Making a Cheap but Effective Aluminium Forge.View Instructable »
I took the top of a fire extuingsjer that I thought would be the perfect crucible. Fire extinguishers are often made from aluminum. They can do this since the pressure is very low, the gas used is safe, and the content is (obviously) non-flammable.Propane is under much more pressure than the extinguisher, and being flammable even explosive has certain legal requirements, one of which I imagine is requiring either very thick aluminum (not economic) or using a stronger metal like steel.
- hydranix commented on MaxPower1977's instructable How to Build a Propane Forge BurnerView Instructable »
Will this produce enough heat to melt asphalt concrete (pavement/tarmac). Yes it will melt the asphalt cement in the concrete.How smooth it becomes is entirely dependent on the aggregates in the concrete. Heating it may even make it less smooth as the warm cement loosens and sinks deeper between the aggregates.You'll likely have to roll the hot concrete to smooth it out, the roller size also depends on a lot of things. Anywhere from 300lb to 3ton roller could be required.
- hydranix commented on barri_kid's instructable Radio JammerView Instructable »
Hi jotclot, I was wondering if the whispers were still bothering you, or if you perhaps had seen a doctor for their opinion yet?Don't let the other posters calling you crazy get to you, you're not. Unfortunately though, if you don't see a doctor about it, the whispers could eventually drive you crazy.I hope all is well with you.-
- hydranix commented on Sonam Sawant's instructable turn webcam to IR sensitive cameraView Instructable »
In case anyone was wondering, this is not a night vision camera (as some comments suggested). The cheapest way to get a night vision camera is to just emit a very bright flood of infrared light in front of the camera. Human eyes cannot see infrared light, but cheap webcams can. Get a handful of high power IR LEDs and point them in front of a normal web camera with no modification.This instructable is not trying to make a night vision camera. It's modifying the webcam to filter out most of the visible light spectrum but intentionally not filtering out the infrared light. Infrared light occurs at a lower (electromagnetic) frequency than visible light, and lower frequencies tend to penetrate better than higher frequencies. But that's only partially true. Since almost all humans are very fami…
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No, there are plenty of lighters that dont use butane. Butane just happens to be the most common.There are zippo lighters, which use the gas created from the boiling lighter fluid.There are propane lighters, as well as lighters designed for all sorts of LP gas.Hydrogen lighters exist as well.
Here's an example of my what I warned about 7 years ago.