/diy/ - Do It Yourself

>>616324
>It takes one to know one.

underage and b&

>>616315
what are you bumping for?

>>616310
you're a fucking idiot.

>>615983
Electrolysis is relatively efficient.
You can easily hit 70% efficiency with common materials, and over 80% if you use platinum.

>>615950
Work = force*distance
Work = 5*788 =3.94 kJ

Energy_in = insolation*area*time
Energy_in = 900*0.24*3600 = 777.6 kJ

Efficiency = work_done/energy_in
Efficiency = 0.00506 = 0.506%

>>616135
your diagram doesn't make any sense

the wire between the arrows is a short

>>615979
•lives with his parents
•calls others children

Grow up Timmy.

>>616098
You can't.

>>615893
>Also to generate the power and also battery's etc is way worse for the environment than just a normal car

Not true. If you're getting the electricity from coal fire its pretty much the same as a gas car. If you're getting the power from solar/wind/hydro then electric is way way better.

>>614992
sounds more like you got a theoretical degree in physics

>>614887
stop biting your finger nails

>>614631
>$1,900

>>614442
www.coilgun.eclipse.co.uk/coilgun_fundamentals_1.html

This article explains why there is no simple formula to use. It also answers most of your questions.

>>614050
You're right. In theory coil guns can be 90% efficient, but most hobby made guns are less than 10% efficient.

Professionally made rail guns are about 50% efficient. Hobby versions probably have a slightly better efficiency than their coil gun counterparts.

For a coil gun, you have to shut off the coil and collapse the magnetic field before the projectile passes the mid point of the coil. Its very difficult to get the timing just right.

For a rail gun, your biggest losses are in the contacts between the rails and the projectiles.

>>613966
Yeah. There are a few good examples on YouTube. Rail guns are much better though. Coils are inherently inefficient. You wastea lot of energy creating the magnetic field.

>>613834
put it in a shipping container

$34,763.21

>>611810
What kind of bike lights do you use?

Humans produce ~150 watts of power, so if you try and power even 15 watts of lights, you're going to have to peddle noticeably harder when you turn the lights on.

>>611468
>he still he's still on facebook

>>611501
>>611504
keep going

>>611454

>>611316
>>611346
When replacing caps, you need a voltage rating equal or greater than the original cap. You need a capacitance equal to the original cap.

>>611280
Yes

>>611243
I dont get it?
you put marbles in a bowl?

please explain