I need to level a 32' long machine. Lengthwise is easy, but along it's width is a pain. I have to check in about 8 places along the machine. This takes awhile to do with only one precision level. Since these levels are about $120 each it is not realistic to buy eight. I need to save time and effort. I was thinking of trying to build a bunch of electronic levels to place in their designated areas so I can find the "level" of each area without moving a level to it. Any ideas?

 I'm not after anything in particular here just want some opinions. After recently applying to my local sixth form college I'm curious as to...well I just want to talk really. My options are: 1.Chemistry 2.Physics 3.Mathematics 4.DT: Product design - Materials Reserve:Computing GCSE: P= predicted grade, C = current grade (Or already gained GCSE), L/10 = how much I enjoy, G/10 = how capable I am. Maths: P= A*, C=V. high A, L8/10, G7/10 Physics: P=A*, C=A*, L9/10, G9/10 ICT: P=D(distinction), C=D, L7/10, G10/10 BPE: P=A*, C=A/A*, L6/10, G8/10 Chemistry: P=A*, C=A*, L9/10, G9/10 DT (Electronics):P=A*, C=A*, L9/10, G9/10 Catering: P=A*, C=A, L5/10, G8/10 Music: P=A/A* , C=B/A, L5/10, G7/10 Biology: P=A/A*, C=A/A*, L8/10, G7/10 English Lit.: P=A*, C=A, L6/10, G6/10 English Lang.: P=A/A*, C= B/A, L6/10, G6/10 PE: No GCSE Anyone else recently applied for sixth form? Currently at sixth form college or university? Any advice? I reckon I am going to end up (sounds so negative) in Engineering or Science, whether I choose University or an apprenticeship etc. ANY advice appreciated.

Does anyone know how I can build a simple sound level meter with a light that will come on at a certain sound level?

Trying to build me a battery status or level indicator, using the LM339 series IC. I am just not that familiar with this IC. I want to make this using 3 red LED's, 3Yellow and 3 green or using a bar graph LED. Any advise on how to hook this LM339 up?Thanks

I bought a 3 axis CNC machine from amazon, after putting it together with poor instructions, I had what looks to be a auto level prob wire. I am trying to figure out how and where to connect this single wire to the board? the IC in a atmega328p with Arduino loaded . I have some photos that maybe someone could tell me which pin to connect this to? thanks

Hello all, I have recently moved up from GCSE level education to A-Level education and I am happy with my subject choices after one week of being back after a long holiday. I am taking: Chemistry Physics Mathematics Design and Technology: Product Design - Materials I am worried about my mathematical ability though. Despite getting an A grade at GCSE, my true ability (in general) is somewhere around a B. I excel in geometry, shape, mechanics - anything with REAL WORLD application. I do not fare so well in the 'Maths for the sake of Maths' bits, namely some algebraic sections and whatnot.  I am aware that the jump from GCSE to A-Level is a difficult one and that many students struggle with it (Maths in particular). I just thought that I would post this here to see if anybody who has been through a difficult 'step-up' in work difficulty could offer me some advice.  Also, this is a forum post so that anyone, in any education system, in any 'step-up' can discuss their issues, or offer their advice. So, don't feel left out Yanks! :-) I thank you all in advance.

Hi there everyone. So I have a bit of a dilemma. There's 3 or 4 beautiful knotted and dried tree stumps that I pass everyday and I've finally decided I want to drag them back home with me (which is another problem entirely) and use at least one to give my rain barrel some height. It's about a foot and a half in height, and just about thick enough to handle it. My problem is that the top is completely uneven and has been hacked with a chainsaw. I'd need to level the whole thing on top and bottom to make it useable. I just have no idea how I can go about doing this WITHOUT using a chainsaw. Thanks in advance everyone. I'll post photos soonish.

So, I am doing a science fair project about what  pH level is best for sea monkeys and what happens with the other levels.  Dies anyone know how to  adjust the pH levels easily in such a small amount of water??

This future instructable will show you how to make levels that I make or if you have made on I will collaborate the future instructable with you and you can post yours. if you don't want to be colaborated all you have to do is post a picture of your level ,tell me what map you used ,what story line you edited it from. and I will re create it and ad it to this instructable. please do not post a level unless it's some awesome machine ,or if it can actually be beaten. ideas for levels: try to get Gorrilda to the Gurts but lure her to explode bombs to blow them up. Try to make here take a detour so she doesn't. I made one just like that where it shoots a Gurt into space if you don't stop Gorrilda from detonating the bomb. more coming soon... maybe.

Ok 1st - this is like the best contest instructabes has ever done.. 2nd - ...only...people...from...usa...can...friggin...win... 3rd - refer to topic title.... Anyone from UK want to storm America with bear cavalry?

Looking for anyone's practical experience here. I have made backyard rink last 3-4 yr, now upgrade to Nice Rink liner. Holding water never a problem, many in Northeast last yr had limited time due to warm winter. My rink is triangle shape with legs 20x30. Slope on one side  goes from 1" to 7" or so, average ice thickness is 3-4". Part of rink over brick patio block. Use wood 2x6-2x10 borders. Was thinking of putting hay/straw under liner in the deep sections to reduce volume/depth so I can freeze solid and not have water layer under the ice. Or do you think the trapped air (under liner) will warm and work against this. I would think enough straw would not fully compress and help reduce water level, but then interface between liner and actual ground will have a lot of air space. Got a few months to think on this, my season is late Dec-mid Feb.

I need a nice, simple charge indicator. I have a battery pack that holds 4 AA NiMH batteries. Normally they charge up to 1.3V per cell or 4X1.3=5.2V total. I have a solar trickle charger on there too and I'd like to have a little charge indicator.   Requirements are: -low part count -under $10 -small (it's on my bike helmet) I was thinking something with a pushbutton an LED or two and a zener diode. Something that turns on the LED at  greater than 5.2 volts. But I don't have experience with zener diodes. Has anyone seen a system like this around? Can you think one up? -Cheers

I need help trying to replace a RS232 level shiftre with an USB plug. Any ideas?

I need some help in making a bluetooth water level that uses standard float switches.  Once a float switch is triggered it would close or open a circuit then the data of which circuits are opened or closed can be used to determined the level in the tank. This will be sent via bluetooth to a mobile device were i will develop an app to visualize the data. Please i need info on how to setup the electronic components.

I want to know how this would be accomplished PLEASE. Looking to make a bluetooth system that sends water level of a tank to a smart phone. I would think the most cost effective way to do this is by using a bluetooth module and float switches. The module would send three levels full, half and empty, so say all float switches are triggered it would be full, only one it would be half and if none it would be empty. What do i need to build this.

I want to make a water level indicator without sensors or ic. I want to make it with switches. I have a switch in which we have to press the switch to turn it on and if we leave it, then it turns off. So i can connect the switches with the leds and power it with a 9v battery. Please can you make the wiring diagram for this.

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

Hey everyone, I hope im posting this in the right spot.  I run a large farming operation and get my water from a well that pumps into a large storage tank about 10 feet deep and 6ft diameter.   Because the well is very old I'm not able to add things like a float that will turn it on or off for me so I'm constantly having to check the well though out the day and if the cows are more thirsty one day they can drink the storage tank dry and that causes me problems with my pump, or if i leave it to long it will overflow and it makes a terrible mess. So im wondering if there is a way that I can wire up a water level indicator in the well-house and have a light board in my house that shows me the level of the well.  So for a 10 ft deep well id have an led light for every 1ft or so and when the water level gets to the top foot a buzzer would go off and when it hits the bottom foot or 2 ft then a buzzer would go off.  Ideally a wireless transmitting to the house would be best but I have no idea how that could work.  And wired would be hard with the well house being a few hundred feet away from my house.  I've done a lot of googling and haven't found anything that would suite a large scale water tank like this.  I purely want to be able to see in my house where the water level is and have it warn me when its too high or too low.  I apologize since i don't have a lot of experience in electronics.  Any help is greatly appreciated as i have no idea where to start or if its even possible.  Thanks guys!

So this is what I came up with eagle for the lm3914 can someone please verify if this will work as intended.

How would one make a cheap attitude indicator for a jeep...i go offroading and i just thought it would be cool to make my cockpit look more like a cockpit, im putting up some toggle switches and a couple other cool accents but i thought the coolest would be something that shows me how far my jeep is tipping when i flex it.  So if anyone has any crazy ideas on how to pull one off let me know, ive had some ideas of like pinning a floating compass to an axis so it only tips back and forth...but the real electronic ones for aviation are thousands of dollars and very impractical.  Help me out here people....  email me at artbynathanmenke@gmail.com if you have any ideas

Over the years many young players have said to me "Boy ,I wish I could play like that"   My stock Question is:  Do you enjoy playing.??? of course most say yes.  I would tell them that's the important thing not if you are as good as this or that person.   Each individual has their style, to illustrate, I was ill some years ago and my wife and I went to a concert...Box Car Willie, as the band struck up with a steel guitar I looked at my wife and said "Dave Nutt: and indeed it was when the curtains opened,   You see we all have our own "Personal" style...Forget copying anyone be yourself.  I can't think of a single successful guitarist  who copied someone else here are a couple of examples Chet Atkins, Albert Lee(He has been playing as long as me, currently works for Earnie Ball in the states) and James Burton.    2.Mark Knopfler. 3 Johnny Hiland (Who is Blind) all different ...similar styles with some and yet still different.   So keep pickin' and enjoying. http://www.youtube.com/watch?v=VdJ9RS_Xubs&NR;=1 http://www.youtube.com/watch?v=bODwgw9Lw0Q http://www.youtube.com/watch?v=4oSQpKuY968&feature;=list_related&playnext;=1&list;=MLGxdCwVVULXdnekNzLLxpJLuoL7Nah2vz

Is there something or someone here that can tell me how I can make a one or two laser pointer into a crosshair laser level? 90 degrees on all sides

At the moment, a full feature for a project gets that project onto the front page as an "Editor's Pick", but all a feature at Category or Channel level earns an author is a small star on the project's thumbnail. What I think should happen is... I look at the front page, I see the most recent top-level featured projects (as now) I click on a Category, say, Food, I see all the top-level food projects, plus all the Category-level featured projects. I click on a Channel, say, Sandwiches, I see all the top-level, Category-level and the Channel-level sandwiches. That way, authors will be rewarded for their work with the increased traffic they deserve. The photo is irrelevant, I just don't like publishing topics with no image.  It's the Angel of the North, with Conker-X sitting on the toes.  I took it on the way home from the Newcastle Maker Faire.

I saw it in Kaustic Machine's schematic for the Atari Punk Console. Does anybody know what it is?

I have a tank that's above my 2 story house. I did use a 50 foot Ethernet cable and wire up a level indicator, with 5 levels from empty to full. But the wires always corroded, and it just stopped working. What i'am looking for is a way, to do the same wirelessly. Maybe even automate via ifttt, as my motor is connected to a smart plug the HS100. How can i accomplish this, the tank is open to the elements, so something waterproof, and solar/battery operated would be great. I did think of the Xiaomi Water sensor, which generally checks for dampness,but that needs a Xiaomi gateway, so what does the community suggest? 

Https://www.instructables.com/community/LM3914-Battery-Level-Montitor/     I am trying to make a Battery Level Indicator using the LM3914 IC. The problem I am facing is... where you see those 3 LED's my voltage increases on the pot, where as when the LED's are all the way on it decrease across the pot. I am using a 9V Battery where I want the red led to show depletion  of battery life around 5 or so volts  how can I achieve this. Can someone please help me with this?      Which pin can I set to 5v and how?

I am trying to make a Battery Level Indicator using the LM3914 IC. The problem I am facing is... where you see those 3 LED's my voltage increases on the pot, where as when the LED's are all the way on it decrease across the pot. I am using a 9V Battery where I want the red led to show depletion  of battery life around 5 or so volts  how can I achieve this. Can someone please help me with this?

Hello, So for my application, i need to have a circuit that can monitor the input voltage until it reach 5V (usually from 0V ) then switch on and allow the 5V to flow into another circuit.  The problem is i have no idea where to start. Can anyone help me ?  Thank you very much

So I looked up the data for the LM3914 followed the steps and I still cant get this thing to work I tried it two ways. I want to be able to set this up for variances of voltage say from 1.5V to 30 volts. Any advise would be great.

I've got a 2 channel color organ with an electret mic for input. I'd like to be able to remove the mic and run it directly from one side of a stereo output from a cd player. I know I need to have something there to replace the mic, but I'm an audioidiot. Thanks. BTW, this is for a puking skeleton for Halloween. The color organ will drive the pump, while the audio will be, well, the audio.

I plan on buying 2 of the following Hard Drives: http://www.newegg.com/Product/Product.aspx?Item=N82E16822136294 I also buy the following RAID controller: http://www.newegg.com/Product/Product.aspx?Item=N82E16816132012 Will these be compatable with eachother in a RAID 1 setup? After plugging the HDDs into the controller, and the controller into my MB(http://www.newegg.com/Product/Product.aspx?Item=N82E16813131363) is there anything else I need to? Or will BIOS automatically take care of it? Thanks!

Can someone please provide me with a schematic to turn on an LED when a 9v PP3 gets low (~<20%), no microcontrollers, the simpler the better. I am hoping you can do this with a few diodes, transistors, resistors, and maybe some capacitors, but I can't think how this would work.

I need to be able to see the charge level of a 12v rechargeable battery and want it to be as simple as possible. Would this setup work: 3 zener diodes (at different breakdown voltages 10, 11 and 12 volts for example) with cathodes connected to positive so that when the battery was above their breakdown voltage an led could light up. Here is a diagram:

I was just thinking that something like this might be handy for a teacher. If you had some device that could read the volume level in the classroom and display it in a bar format so the students know when they are getting too loud. It'd be nice to be able to say, "ok, you can talk with your group but stay under volume 5" or "if you keep it below volume 3, you'll get more marbles". Anyone know if this could be done and how?

Hello i have battery on helicopter and i need to read power of this battery to use it in pid gain ,i read voltage using voltage divider and calculate it and i sense current before motors and calculate power, but i dont think this is working, can you help me for that?

I have a small all-in-one motherboard that runs Linux (http://www.pcengines.ch/alix3d3.htm). It only needs 18V to power up and the battery from my Black and Decker drill is 18V. I am able to get the board  to power on by holding some wires on the leads of the battery. My question is, can Linux detect how much charge is left through a DC jack? Or would that take some extra circuitry? My goal is for the user to see a percentage of battery life left (like on a laptop) and maybe to shut the board down if the charge gets too low. Any advice is appreciated.

I am trying to design an automatic watering system for a chick brooder at the ranch.  We are off-grid, so don't have electric.  The brooder is in a room in the barn beside a water tank.  I want to set up a siphon system to get water from the stock tank to fill the water tanks in the brooder--but need to have some way to turn on and off the water automatically.  I've seen the water sensors and no water sensors, and think those might be a start--use the no-water sensor to trigger the flow of water, and the water sensor to turn it off--but I'm not sure how to rig up a siphon that can be turned on and off, and not sure how to wire the whole thing together.  Any help greatly appreciated.

I need to be able to see the charge level of a 6v rechargeable battery and want it to be as simple as possible?

Hello, could someone please tell me how I would go about levelling out my garden or particular blocks of it? Thank you in advance.

OK, I've played with those @%!%^ weights till I'm dizzzy - how do I level this dumb fan??

I have an uncle who want to make a light that will turn on when a senser come in parallel with a 360 degree plot level. to be attached to some heavy equipment to allow him to grade some property. any help? he was trying to avoid using a processer or computer, but whatever it takes to due it.

I removed a wall down the middle of my basement.  It had a concrete footing which came out with the curb when it was removed, but the concrete floor on one side of this area is one inch higher than one the other side.  How do I level this so I can install a floating laminate flooring?

My property is on a slope.  I need to make a new walk and want it to be level when I walk on it,  plus I need to somehow make sure water will drain off the walk, so it doesn't freeze in winter.  Also I plan on using stepping stones.  Need some home experts information and advice.  thanks

We have a small water-fountain that needs topping-off.I want a valve to allow a 1/4" soaker hose to dribble water until it reaches a set levelI've seen larger versions, but I want to make one that will fit inside a small fountain. I don't even know the hydraulic principle that can do this.Please advise

=Smart= Recently won one of the Instructables competitons. He had alread won a t-shirt, and I had no t-shirt.We're both good friends, and spend many hours talking as part of the chatroom crew.He offered to send me the tshirt, which arrived today, complete with decorated envelope, and a custom etched tag. HE IS FULL OF EPIC WIN

So I looked up peoples ideas off of here and google I set it up the exact same way I must be missing a step can someone please dummy proof this for me.

When i try to set the probe routine (g29) the servo dose not deploy the probe. Also if i try it with the probe down (m401) it will try to probe but the motors don't move so it ends up probing the same spot 3 times. (on the lcd it thinks the motors have moved but they haven't) 3- point probe mode Marlin 1.0.3 dev These problems are when i try on pronterface. My config file: http://forums.reprap.org/file.php?4,file=58699,filename=Configuration.h

And is there any way I could remove the sucrose? I want to as close to pure citric acid in the lemons.

I need to: Low level, Image a 3GB drive with BeOS installed on it, with, Of course, BeFS. Some programs don't work, as the unknown filesystem does not register a drive in windows, and they seem to be too high level. I want to completely image a drive, connected to my laptop via a USB HDD reading thingy, The boot sector, all the files, and everything. Any suggestions to good(free) software that can easily low level image a drive? Thanks ~ReCreate