So I am wiring up a H-bridge for a small electric motor for a robotics project and am a little confused.
This is the only schematic that I can find for this H-bridge.
There is a pdf on that site that is...
So I got into an argument with a buddy over the following:
I originally inserted a hard drive into my system and it was labeled hda, what i hadn't notice was that it was on the master pin setting
now when i switched the pin to the slave setting and rebooted it showed it as hdb
are the two...
I picked up a good and cheap AC motor that came with its own capacitors <not wired in though>
The capacitors are these
and this is the diagram on the motor
Now I tried putting this together but...
Not sure if this is the right place for this, but here we go.
During the Fischer-Tropsch process to create synthetic oils one of the byproducts is water. Is this water removed from the oil somehow?
Also I have been told from some of the engineers that I work with that synthetic oils absorb...
I was hoping that someone here would be able to help me understand variable pitch blade systems for fans/turbines and how they work
I have already searched the internet quite a bit without much luck
There are a few mechanical drawings but they leave a lot to the imagination
Any help is...
I have been reading up using the Line-in on my computers sound card and the pogram XOSCOPE to be able to do some various measurement/analyzing
But before I attempt to actually plug anything together i want to make sure I don't wreck my soundcard
I have found that some soundcards have the...
I am not sure if this is exactly the right place but it works either way.
I am interested in learning more about Composite Design Techniques
mainly fiber based materials (carbon, kevlar, fiberglass, ect...)
does anyone here know of any good resources/books that focus predominantly upon this...
I am trying to find more information about parabolic leaf spring designs.
I have allready learned linear leaf spring design, and I am curious to know how parabolic differs. (besides higher powers)
For my Design of Machine Elements class this problem is being posed.
This is exactly as the problem is stated.
The torque on the 400mm -diameter shaft connecting the flywheel with the jaw mechanism should never go above 700kN m. Dimension a copper square tapered key so that the shaft is not...
Ok I am sure the title caught your attention, but it is not for me, it is for my cat, just kidding.
It will actually be for a model rocket I am building.
I would like to design a ram-air parachute to control a descending rocket (toggles will be attached to either servos or linear actuators and...
I am interested in learning how to control various motors
via my linux computer for robotics projects and possible cnc machines
it seems that serial ports are the most prevalently used for basic robot control
does anyone have any suggestions on where to start?
Well I recently just tore apart an old laptop and salvaged the monitor (still good)
Now I am pretty sure it is nearly impossible (for me right now) to turn it into a useful desktop monitor
but does anyone know of any other cool projects/ideas to do with it?
I have a 24Volt solar panel trickle charging a 12volt Battery
My question is when the sun goes down and the solar panel isn't producing any power. Does the battery then try power the solar panel?
and if so is this bad for the solar panel?
on a smaller electric motor
the motor output shaft is cylindrical with a hex head insert
i am just directly attaching it to a small tire
is there a certain type of drive shaft that anyone could recommend
i thought about using an old allen wrench
but had nothing to hold the drive shaft into...
I am not sure if this is in the right forum
but i have 2 matrices in Matlab
[ r11, r12, r13, dx]
[ r21, r22, r23, dy]
[ r31, r32, r33, dz]
[ 0, 0, 0, 1]
[sin(theta2+theta4+theta1), cos(theta2+theta4+theta1),0, 7*cos(theta1+theta2)+4*cos(theta1)]...
Is there a way to calculate the pressure drag on objects?
without having to turn to CFD software?
also has anyone here ever built their own small wind/water tunnels for testing?
and how successful they were?
I am trying to work through the stability forces on rocket fins
and understand how you need laminar flow for greater stabilization
but i am not sure how to accurately calculate some of these
I was told that the Reynolds Equation holds true, but uses a different cross sectional area
I am trying to learn more about air coupling.
That is the coupling between 2 shafts
I am having a hard time finding any information on the subject matter
does anyone know how these systems work and have any diagrams?
I am going to start working on the controlled descent of an amatuer rocket
I want to go up to about 4000ft and then be able to have a controlled descent to a specific location.
I am still very very early in the process and just brainstorming ideas about GPS locators and what not.
On standard road bike tires sometimes they put a soft/flexible kevlar layer to protect against puncture.
I was thinking about putting in in hard/rigid kevlar layer to also protect against puncture, I know that this will make the actual tire stiffer and harder to deform, which could be a bonus...
can anyone explain to me why radio reception/tv reception ect.. come in more clearly when i hold the antenna?
i am assuming my body is acting as a better receiver
but can someone actually explain why?
so i am trying to find taillight/ brake light bulbs
i need a 6v 10 w (12 v 20 w)
and a 6 v 5 w (12 v 10 w)
and autostores are worthless in milwaukee
none of the carriers have the Wattage listed
they have the CP
i amnot sure what the CP is on these bulbs?
is there a direct relationship to...
when laying my carbon/kevlar fabric
i constantly have the problem of it sticking to my gloves
which is quite annoying and makes it hard to handle
should i be using specialy coated gloves? do they make such a thing?
or is there a "lay-up" procedure that anyone knows of for laying composite...
is there any programs out there where you can enter a layout of a room for a small robot?
like the room dimensions, basic furniture placement ect...
or can you do this with C or Pbasic or some similiar program?
I will be starting my Senior year of a Mechanical Engineering degree.
I want to go to grad school.
I really want to find a program that is based on robotics in an astronautical environment
i don't think such programs exist anywhere though
or if they do i just don't know about them yet.
Not sure if this should be here or in materials....
So I am attempting to braze 2 flat pieces of aluminum
I apply a copious amount of flux
I believe I am heating teh metals thoroughly
my braze is not flowing into any of the joints ever
i have tried numerous times
once I even ended up...
Does anyone have any suggestions of how to make a device follow the sun acrossed the sky?
It will be a solar panel mounted on a satellite dish acting as a large sunlight collector, but it needs to be aligned with the sun for optimal power.
Thanks for any input.