I was aware of the potential harmful effects and was planning on placing the bulb inside of the shoe. Then I was going to place the shoe inside of an enclosure to avoid the radiation and wire a switch that would be accessible from the outside. I was thinking of using a solid colored plastic...
Hello,
This should be a simple question for you guys. I want to buy something very similar to this http://www.1000bulbs.com/product/4850/AU-LPLL18UV.html". How do I connect it to a battery or the outlet? I know I need a ballast and some type of socket but what kind? How do I wire it?
I'm...
Why would I want to allow 25% to go to the resistor? Is it just good practice to not be extremely close in regards to voltage requirement and voltage available? Seems this may also allow the LED to remain brighter for longer as the battery begins to die (lowers in voltage)?
So, for example...
Hello everybody,
I tried to make a special LED I <3 you gift for my girlfriend and it seems that I failed to take into account the battery discharge curve. I was using 50 red LEDs that I originally measured with my voltmeters LED function at 1.7v.
With measuring LED voltage, is it better...
I am in an online chemistry course and its going well except for this particular type of problems. It states letters and tells me to write what isotope it is. Here goes...
Write isotopic symbols of the form X-A (e.g., C-13) for each of the following isotopes.
the a isotope with n(subscript...
my walls are going to be 2x4 spruce studs at 16"o.c. Will this be strong enough to bear the weight of the roof? Do i need to use 2x6's instead or use closer spacing or is this adequate?
I did a little test with some soil outside and found a cubic foot weighs around 120 lbs when fully...
Is there a translate to english button somewhere? lol
so if 1 cubic foot of wet soil weighs x and i need 12x12x4 per sq ft. What i need would be x/3? So i need to calculate based on that measurement to figure out what size ceiling joists and the spacing i need, right?
Also, I was thinking...
Hey,
I am building a storage shed in the backyard and would like to build a flat roof which houses plants instead of a shingle roof. The slope of the roof will be around 1 foot rise per 6 feet run.
The dimensions of the building are, 12 feet by 16 feet. floor is built with 2x10's and the...
i want to make a delta 3 phase system.
Now, i know how i need to wire everything together, but i have a few questions.
the plan is to have A B C and have 4 coils each and i would hook it up like this. A1 -> A2 then A3, A4, C1, C2, C3, C4, B2, B3, B4, B1 goes back to tie into A1. like this...
i was just thinking. Is it possible to use four diodes to make this work correctly?
Say, semi-circle one has wire ends a and b, and semi-circle two has wire ends c and d.
if i connect 1 diode to each wire end and then connect the diodes of a and c and b and d together would that work in...
Hey, I am fiddling around building, basically an alternator. Well, this is what i have designed so far. I made two copper coils, then squished so they were very eliptical and then connected the two flat coils together with zip ties and made a large coil. Basically, the large coil is the two...
Hello, i am trying to remember the name of the guy who created a water fountain that seemed to recycle its own water by using pressure or something in order to siphon it back up to the start. I can't remember the era this guy was from but i am pretty sure it was before electricity so probably...
its like a simple generator but larger. I had made one before in class a long time ago where we wound some copper around a plastic bottle, then spun a magnet inside and had the two ends of the wire connected to a small light bulb and when you spun the magnet it would light up the bulb. Its...