Depth of the water table? Answered

I was unsuccessful in using the web to get a map of water table depths in Chicago. I would like to know where this information can be found. An accuracy of 3 feet would be fine.

Question by ShutterBugger   |  last reply


Depth of the thread cut by a tap?

If I was to drill a deeper hole, I buy a longer drill bit of the intended diameter.  I am sure the same thing apply to the taps as well.  However, in their specifications, I do not see anything about how deep a cut they would make.  So, my question is, what should I be looking if I need to make a deeper thread than than the tap I already have?  I mean is there a number which would say that this tap goes only one inch deep and so on? Thanks.

Topic by kabira   |  last reply


Wallowing in the Depths of my Pool

I have a home in Las Vegas,NV that was given 2 us by my grandparents. PROBLEM- !2ft pool, empty 10 yrs!! Where do I start, what do I need, what do I do¿ plaster, sandblast, paint, or just fill it up, help me out. On top of that, I want to make this as inexpensive as possible

Question by taiibaby   |  last reply


In depth preventative car maintenance....?

I've recently got a 1996 Dodge Neon. Sat untouched in the winter for a year or two. After using it; things have been failing left and right in the vehicle... What are some things i can do to clean out or revamp my car to make it in tip-top "like new" shape?? I'm not at all shy to do anything under the hood. I'm just unsure of which direction i should go. I'd very much like to complete this before winter. Some tips and details would be GREATLY appreciated.

Question by lutziepv08   |  last reply


What could I use for a depth sensor in a SeaPerch ROV? Answered

I am in the process of building a SeaPerch ROV, and I want to add a few sensors with an Arduino. I have the other ones figured out, but I can't figure out what I could use for a depth sensor. I've thought about using a pressure sensor and calibrating it to give me a rough estimate of how deep it is, but I don't think that'll work too well. So if someone has some ideas for what I could do for this, that would be quite helpful. Thanks.

Question by mbudde   |  last reply


Which Direction Does She Spin?

Check out the optical illusion below. Since the figure is totally black, there's no depth- you can see her spinning either clockwise or counter-clockwise. Which way do you see it first? Try reversing the spin direction- moving your finger in a circular motion at the rate of rotation can help you reset. How easy is do you find it to swap perspective? Does it make your brain hurt?

Topic by canida   |  last reply


Pressure, vacuums, and the on earth equivalent?

One atm is equivalent to about 14.7 psi.  Does that mean that if one was in a perfect vacuum a vessel sporting 1 atm would need only hold the pressure of 14.7 psi?  It seems to me that in space (not a perfect vacuum) a craft would only need to hold maybe 12 psi (of course when messing with human life I would definitely allow for 150 to 200% tolerance, but in the end 24 psi still isn't very much is it.  Is there more to it than this, or are all those quotes about how hard it is to deal with a vacuum and how things must be super strong a little over blown.  Going just 11 meters under water exposes you to a little over double air pressure at sea level.  Someone in just a diving suit has been to over 60 times atmosphere and the deepest submarine dive I could find was 1083 atm at around 11000 m.  It just seems to make holding out a vacuum a little overrated.

Question by seedorfj   |  last reply


Seeing apparatus for the blind

Here's a flowchart.  Ask questions. I do not intend to profit from this idea.  If you want to try, then please help people see.

Topic by lowen1   |  last reply


Anybody want a neat idea for a project?

This is a project that really needs to be done for real, but I don't have the resources right now. Come on, folk, get on it. From XKCD.

Topic by Kiteman   |  last reply


Shallow depth of Field... From a tiny lens?

It is a nice effect to open up the aperture of a camera, focus on the subject, and allow the background to go blurry.  But many of today's still and video cameras have a tiny aperture. How can I get shallow depth of field from such a camera?

Topic by Toga_Dan   |  last reply


inset feed depth and width in microstrip patch antenna?

I am making an microstrip patch antenna for satellite navigation in L1, L5 and S band. Initially i have started with the design of inset feed microstrip patch antenna for L1 band and i have a problem in finding the width and depth of inset feed of microstrip line.

Question by jerry.sra   |  last reply


how do you make a small depth gage about 3cmx3cmx1cm?

I want to make a depth gage to fit into a submergable watch. a power source is also needed to fit.

Question by sammy mast   |  last reply


How to make pump for a waterfall ( height approx. 10cm) and water depth approx 2cm for an aquarium.

I have this aquarium 60x30x30 cm. I wish to setup a waterfall in the aquarium. Now the depth of water in the aquarium is to be approx. 2cm and the height of waterfall is to be approx 10cm.  I am looking for a pump design which could work comfortably in that water depth.

Question by adeshwal   |  last reply


water proof a webcam?

Prefferbaly somthenging that i can add too and add light and go a small depth

Question by mman1506   |  last reply


How deep do i have to drill into the ground to hit water in st louis (near lambert airport)?

I have searched google for hours.  cant find any information on the approximate depth to the aquifer, water table, groundwater.... near lambert airport here in st louis, missouri.  Does anyone know of a source of graphs or charts showing depths underground to the water??.... or have personal experience digging/ trenching/ drilling/ in this area???   Thanks.

Question by framistan   |  last reply


need a custom built sofa for 2 people?

Space is limited so max Ht 85cm, Depth 85 cm Width 170cm.  Needs to be of simple construction!

Question by randfmoore   |  last reply


Pin-Pressions/ Rotation Sensor

I'm trying to build a sensitive pinpression device: one that can see 3d digital images. The device would be able to read, record and organize the depth of each pin. I think the first problem to overcome is figuring out a cheap way to measure pin depth. I think it will be best to do this with rotation sensors. Does anyone know how to build or where to buy cheap rotation sensors?

Topic by yes   |  last reply


How can I design and develop a earth resistivity meter for groundwater exploration upto a 200mtrs investigation depth

This meter will contain 2 set of meter, one to measure current injected into the ground and the other one to measure potential or voltage between 2electrode potential.

Question by gtscrustal   |  last reply


Help regarding mobiles

'can anyone tell me the link where i can study the working of mobile(NOKIA) phones in depth?i mean the circuit diagram, symbian programming,about their memory structure etc.....

Topic by surendar   |  last reply


how to make a bathroom cupboard under the washbasin?

Measurements are as follows height 31inches width 34inches depth 17 inches. instructions on how to cut the top peice of wood to fit around the basin would be most helpful

Question by    |  last reply


about superheating and supercooling.... Answered

If superheated/cooled water is exposed to exaggerated temperatures, like 1 million° celcius or to the very depths of coldness, does it still stays in liquid form? in other words, is there a limit to superheating/cooling?

Question by necropolian   |  last reply



How do I turn AGC (auto gain control) off on a webcam?

I want to make a DIY 35mm style digital camera from scratch out of a webcam, a Depth of Field adaptor, and a micro-pc. The only problem is that DOF adapters are very dark, and they cause a webcam to use it's auto gain control (this causes little multi-coloured patches in the dark areas known as "noise"). It's a great idea for a video chat in the dark but nothing professional. I know that all the webcams I've researched can't have gain turned off via a PC, so surely I can detach something from the PCB of the webcam (I assume there is some sort of gain module inside it). Please Obi-wan Kenobi, you're my only hope. What can I do to turn the gain off?

Question by tyldob   |  last reply


Electronic water level gauge for well

I have a 32m deep, 95cm diameter well, that is covered with two heavy concrete covers. The water depth is about 20m down from the surface. I cannot easily access the well to sound the depth or visually check the water level. I would like to build an electronic water level gauge that will tell me the amount of water in the well. I can then regulate watering accordingly. It was suggested to me that I use a washing machine pressure transducer but I have no idea of the circuit required. A refined solution would send data to my PC !!!! I have 240v AC supply to the well pump. Any ideas? Steve

Topic by SteveG31530 


A Guide to Screen Printing As a Supremely Accessible Art Form

Here's a pdf of an in depth tutorial on high quality, cheap screen printing. I couldn't post it as an instructable so I was told to post it here. Check it out: (the pdf below)

Topic by humanpoweredprinter   |  last reply


What wattage laser would I need for engraving ABS plastic?

I want to build a laser engraver that can engrave ABS to a high enough depth that the grooves can be filled with resin. How powerful a laser should I get?

Question by JN8   |  last reply


Large LED diffusers

I'm working on a project where I need large rectangular LED diffusers, about 2" x 0.5". I don't have much depth (about 0.5") to work with. Is there something I can buy, or something I can make that will act as a large enough diffuser? Thanks

Topic by Artifex   |  last reply


I have to put in a "French Drain" from my backyard to the front. So what do I need to do?

I've dug the trench but I'm having problems get the right depth for gravity to take over the water flow.  What am I doing wrong?

Question by gary.myers   |  last reply


I vaguely remember there is a way to dimension a drawing? Answered

Say you have a drawing or picture of a chest of drawers. It tells you the height, width, depth. There's a way to get the drawer dimension and such other needed measurements. I just cant recall how this was done, ie, a drafting ruler?

Question by BluTiger   |  last reply


Interest in Gundam Models

I have been surprised that there isn't a Gundam modeling tutorial on Instructables. If theres an interest in Gundam Models here I could post quite a few in-depth Instructables on the subject(custom painting. custom parts making and assembly). Thanks in advance for any and all comments.(And thanks to DannyChoo for the pic)

Topic by darkmuskrat   |  last reply


I am trying to automate a hydroponics system with many sensors and realys. Has any one done this before?

Sensors: Air Temp Water Temp Humidity Air Flow Light Levels Water Depth Ph Levels Co2 Levels in the Air Co2 Levels in the water Oxygen Levels Air Oxygen Levels Water

Question by ckirchner001   |  last reply


How to make a Three Axis computer inpite device for 3D modeling?

Does anybody know how to, or have they made an input device for 3D modeling that tracks horizontal movement, vertical, and depth?I'm looking to build something similar to this device. Link: www.youtube.com/watch

Topic by jacob5680   |  last reply


Has anyone seen the ghost of halo reach on local maps?

My brother has seen the ghost of Blackout from halo three on Three different maps on reach levels, Boneyard, A forged level called structure depths, and Zealot. does anyone have an explanation for this, or have info to contribute to an explanation? 

Question by Runeblader97 


Solar panel design: Optimal thickness and air-tight or vented? Answered

Is it better to minimize airspace inside a home made solar panel, and should the panel be air-tight, or have ventilation holes? I'm trying 1/4" depth from the cells to the Lexan cover. It will be used in a climate that ranges from +35C in summer to -35C in winter.

Question by    |  last reply


LED cube

Dear Sir, We are a marketing company in Saudi Arabia . We are interested in buying a customized LED cube for a project that we are handling now. The LED has to be one meter in length and one meter in depth and 2.5 meters in height. Please let us know if it is possible to build it and give us a quotation on that. Regards, Amal Alsayegh Marketing and PR rep. Zone Arabia amal@arabiczonesa.com

Question by AmalZone   |  last reply


Help! My concrete is cracking!

I constructed 4" triangular molds out of cardboard (I am making coasters).I poured quikrete mortar mix into a cup, mixed with some water and poured into the molds until the depth was roughly .5".About 1 hour into drying I realized that huge cracks were forming!How do I eliminate or reduce cracking?

Question by TaylorC86   |  last reply


LED cube

Dear Sir, We are a marketing company in Saudi Arabia . We are interested in buying a customized LED cube for a project that we are handling now. The LED has to be one meter in length and one meter in depth and 2.5 meters in height. Please let us know if it is possible to build it and give us a quotation on that. Regards, Amal Alsayegh Marketing and PR rep. Zone Arabia amal@arabiczonesa.com

Topic by AmalZone   |  last reply


Plastics in the Automotive Industry

This isn't an in-depth tech article or anything but it's interesting to realize just how much the auto industry runs on plastic: http://www.paxonplastic.com/the-automotive-industry-welcomes-a-plastic-future/ I even read that a 3d printed car might be hitting the market as early as the end of this year. Not sure if that's just a rumor but it doesn't seem far off. 

Topic by PlasticPanama   |  last reply


6MM Wood for 3D printer Frame?

Hey everyone.  I have a laser cutter.  I want to use it to build a frame for the Prusa i3 3D printer.  However, I was looking on the wiki it says that the wood (or acrylic) needs to be 6MM in depth.  Does anyone know where I can buy a full sheet (meaning 4'x8') of 6MM plywood? Has anyone done this before?

Question by evo_the_engi   |  last reply


Sound Proofing A Wall...? Need Cheap Ideas That Work...

Hey Everybody I Need Some Advice On How To Sound Proof A Wall Between Mine And My Room Mates Room...It Seams At One Time There Was A Door There But Someone Took The Door  Out And Replaced With Drywall...There Seams To Be A 3 Inch Depth And Would Really Like To Use This Space For Egg Cartons Or Other Ideas...Please Let Me Know No Matter How Crazy Thank You...

Question by doriean   |  last reply


Probem Statment for innovation/invention

Im currently enrolled in an Engineering design and development class for school. The class is broken into groups and each group comes up with a problem statement. Each group then works on the project in depth all year. My group is having a hard time coming up with problems that need solving. Some of our ideas are: Space efficiency alternate uses for "X" materials clean transportation/energy Any ideas are welcome and much appreciated Thanks-Nick

Topic by Habernic000   |  last reply


How can i enter my existing instructable into the clock contest?

It appears that if you did not make the instructable in a specific time range it can not be entered. However I have never entered this instructable into any type of contest before and would like to enter it if possible. I feel like the instructable is very in depth and deserves to be listed in at least 1 contest.link for instructable:https://www.instructables.com/id/Arduino-Nixie-Clo...

Question by Cledfo11 


How do we remember? Answered

If anything was an inspiration to education in the wider sense I would think the breadth if not the depth of knowledge the regular answerers here show is an excellent example. How much information can the human brain contain without exploding. Where in 1972 was a speed record of 11.2 MPH set? Who was the second president of the USA Alphabetically what are the first and last US states. What was the Beatles first film We can all, (well mostly), look up the answers but knows of the top of their head??

Question by rickharris   |  last reply


How can I heat my swimming pool early? Although I live in the south (NC), my pool is shaded by neighbors' huge trees. Answered

It takes 2 months to get to a good swimming temperature.The pool is 16 x 30', depth varies from 3' to 9'.? I have a solar blanket which will keep the heat in. But it will also add trash(grass and gravel) if I put it on and take it off everyday.

Question by diydiva   |  last reply


TINY YELLOW HOUSE- webshow- episode #1 (tiny cabins- junk construction)

Here's a link to episode #1- as a test run of sorts. Subsequent mini-features will cover some more in depth, step-by-step construction of several different redneck-thrift building projects. http://www.youtube.com/watch?v=GEvYT3CMtQI -Deek http://www.relaxshacks.com Author of "Humble Homes, Simple Shacks..."

Topic by Deek D   |  last reply


A look at recent FireFox 3 vulnerabliities...Heads up

True to form, Billy Rios promised a more in depth look at the MSFA2008-35 vulnerability which is another protocol handler flaw in Firefox 3. As previously reported here, this was another protocol handler flaw that led to arbitrary remote command execution, and is especially dangerous since it can be deployed widely through the use of a cross-site scripting attack vector. Note, Firefox3 no longer registers the Gopher protocol handler, which is a great security decision.Site Link - ZDNet

Topic by Goodhart   |  last reply


What to do with metal tin?

So theres this broken (battery dead) executive calculator thing lying around my house. I'm not really interested in the calculator.(Anything worth salvaging?) But it was held in a nice thin silver metal box. Measurements are.. Length 9 cm Width 6 cm Depth 0.9 cm As you can see from images there is a hole where the battery would have been changed from on one side of the box. Can anyone think of anything fun I could do with this?

Topic by Turbo427   |  last reply


Need Advice about how to: Stack 2 IVARS on top of each to reach the ceiling

I like the width and depth of the smaller IKEA Ivar bookshelf.  How do I connect stack 2 on top of each other to reach the ceiling. ? I need help with the design, then I'll ask my husband to help me. I've given up Billy's because they are so unwieldy. If you can think of another system which is shallow and narrow, I'm open to other alternatives.

Topic by BarbaraK65   |  last reply


What components would be needed to build an ultrasonic thickness gauge to measure paint the thickness of paint coatings?

I need an ultrasonic thickness gauge, they work by sending a pulse through the material being measured (paint in this case). When the pulse strikes a denser material it returns to the sensor, the delay from the time of the pulse being sent to being received gives the depth. I anyone knows the components that would be needed, or ideally, a set of schematics could you be so kind as to help me out. Thank you.

Question by alkem   |  last reply


Knol.Google

Http://knol.google.com/I notice there's also "How to Backpack: starting from scratch", maybe they're trying to compete with E-How/Wiki-How too? Slashdot-Google has taken the wraps off Knol, its expert-written challenger to Wikipedia. Wired has an in-depth look. Knol's distinctions from Wikipedia are that authors are identified by their real names (and verified), and that they can share in ad revenue if they choose to. The service initially features a lot of medical articles, which is interesting considering that Medipedia also launched today. This medical wiki is backed by Harvard's and Stanford's medical schools.

Topic by ll.13   |  last reply