water inline low pressure gauge at output

I don't know if they sell them , water Inline  pressure Gauge  made for 5 lbs and under, or is there an easy way t to make one, doesn't have to be inliine, it just needs to  measure the psi at 5 gallons and at 1 gallon.. Even A balloon that burst at 3psi would be good/. it is for a medical device. i spent the last year going crazy cause it was defective brand new.  it was putting out the correct  pressure at the start, 5 gallons, at the half way point it was putting out about half the pressure, didn't know it, almost had  surgery because of the poor results thanks for any ideas

Topic by escapefromyonkers   |  last reply

IS there a sensor to measure water in atmosphere?

Actually i want to know whether there is a device which can measure the rain fall (not actually before hand but atleast in few minutes after the rain starts)which can be otherwise be substituted by a sensor which generates a message when it detects rain..........

Question by kadkab.abdul   |  last reply

How can I color aluminum wire without annodizing?

I bought a spool of 14 gauge aluminum wire for chain maille. My goal is to have alternating black and natural colored rings used for the maille. In a household metal working book I found from the 80's, they said to,"Mix 2 tablespoons lye into 1 quart cold water. Add aluminum part for 1-2 minutes. Submerse part into household dye mixed according to manufacturers directions until desired depth of color is achieved. Rinse in cold water".I tried this method using RIT black household dye; however, it was not successful. I am trying to dye the wire both RED and BLACK. If no method for the red is found, I can purchase a short length of anodized red wire; however, If there are any chemical reactions for turning the wire black, that would be great. Thanks!!

Question by kreationism   |  last reply


Hi there, I would like to say hi to the instructables members for a start. Hi! I have always enjoyed reading from this site and I see that there is a lot of help in the topics posted here. I am a Computer Technician that now wants to play in the hardware game (Are you all enjoying Windows 10?). So I'm starting small with an arduino and the raspberry pi, (not side by side yet,) a few motors, servo's, 7" color crystal display, and other things that I have salvaged from stuff or found cheap. I have a few of these CD drive eject motors with lil' knobs I was reading this post about how to make an electric magnet as I am trying to manually make my own point motor for my model train set.  For those in and not in the know, here is some information about what I am trying to do. Create 2 electric magnet coils that pull or repel a nail or metal bar where an upright pin ~2-4 mm is able to travel a distance of ~6-8mm (oo Gauge) in order to change a track piece from one position of a "junction point" to the other, allowing the train to change track or take another route. I would like to try and do this myself as I have plenty of different types of gauge wire, dpdt's (for pole switch?), nails or metal bars(to act as middle pin maybe and bar to be pulled back and forth), diodes (for bridge rectifier) , resistors (to calm the voltage down if I have to as I think it will get rather warm else), a constant power supply (16V ac admittedly)  and plenty of BABY BABY small yet rather strong.. magnets..etc.. ( BTW These were taken from a motor that was inside some water speakers, for perfect reasons the motor had a spin disc attached to it with 3 very small magnets, then in the water compartment there is a spin disc with more magnets attached and a wirly-gig to create the siphon to jettison the water up when the music is played so I now own 60 of the little blighters, (that's if i need them at all to be honest I'm a little lost in this idea))  So please take me as a n00b and please help me in going about this. Yes I could go buy one, but what does that achieve, when I believe I have everything I need at my fingertips and I wish to learn. I presume I will need to deal with the constant AC in order to be able to make a switch to change the polarity of the two coils in order to pull or repel the magnet or nail in either direction to then move the tracks junction from one line to another. I'm going to try and make some coils, in some rather thin wire that is insulated.  Thanks again for any replies. EOL

Question by WAREZRONIN   |  last reply

Zombies, and what are your plans and ideas for killing them?

Plans? Ideas? Instructables? Bullets, ammo, makeshift guns, what are your plans? Hygiene, Food, escape routes? Can you suggest guns (THAT YOU HAVE USED!!!)? Here are my plans... Im saving money for a Walther P22, possibly buy a silencer, (They are illegal to use in my state, I belive not to own one.) I will be stock piling ammo for a 20 gauge scattergun, .357 rounds, .38 special rounds, .22 rifle rounds, plan on buying a cheap .223 rifle for picking them off. Also buying sights and scopes for a 20 gauge shotgun, a .22 long rifle, and a .357 magnum. Whenever my brother or parents drive me around places, I look for friends houses, some who have guns, Ideas to signal that im human, geographically and easily defendable homes and areas. I look for random scrap wood and metal, and I try to find out who will be able to take the stress. I try to meet people in my area. Still in the process of stock piling water, and getting those canned peaches I love so much. Im saving wood pieces, trying to find heavy sheet metal, just as gadget-evilusions said. I have actually begun to devise gadgets, weapons, landmines, makeshift munitions, ammunition, and other anti-zombie things. Plans on quick-welding lawnmowers to the front of a car, 2x4 plus nai equals effective weapons, chemical warfare angainst the Brooks zombie, and others. One of my main projects is printing and laminating topographical maps from google maps and applying section numbers to them. I have told my friends when the day comes, Ill be knocking on your door to save your butt. Im planning escaoe routes, and am in the process of building a two person raft. Pyrotechnics for signaling and otherwise are in effect. Everyone, get ready for Z-Day, and please, tip the chef! (Beacause, you know, chefs have big knives...) ~RoAr

Question by PKTraceur   |  last reply

8x8x8 Led cube, Parts help?

Ok, Ive been debating this for a long time, and I already bought some of the parts, But Im trying to figure out what else I need. So far, I have" Computer power supply Prototype board from radioshack with copper eyes. Two way screw terminal 3 - 20 pin IC terminals (I know I need more, but 3 is all radioshack had at the time) 2 - 16 Pin IC terminals 1000 uf Capacitor - 6.3v 100 uf capacitor - 10v 33uf capacitor - 6.3v A push button 3 status led's (Red, Green, and yellow) Arduino uno protoboard ^ I also have 18 gauge aluminum wire for the layers.  I have a spool of rosin core solder (I hope this will work, I dont wanna buy more) And Im going to get 1000 blue leds off ebay. with these specs: Color: Blue Size (mm): 5mm Lens Colour: Water Clear Forward Voltage (V): 3.2-3.4V Wave Length(nm): 465-470 Luminous Intensity : 11000 - 12000 MCD Life Rating: 100,000 Hours Viewing Angle: 20-25 Degree Max Power Dissipation : 80mw Max Continuous Forward Current : 30mA Max Peak Forward Current : 75mA Reverse Voltage : 5~6V Lead Soldering Temperature : 240°C (<5Sec) Operating Temperature Range : -25°C ~ +85°C Preservative Temperature Range : -30°C ~ +100°C As far as the rest goes I have NO idea what I need. Im going to be using my arduino with it, And im not 100% sure how to change the current instructable here to work with it. they dont specify.  Any help would be really appreciated. Ive wanted to make one for a LONG time :D

Question by 'earl   |  last reply

Pipboy 3000 SCUBA computer? Answered

I am a fairly avid scuba diver, I try to dive every other weekend, but I think I want a dive computer. It can calculate my pressure group, weather I do a multilevel dive or use a different nitrox mix. A good dive computer should also tell you your current and max depth, tell you if you are ascending or descending to quickly, include a compass and maybe even show you how much air you have left. It should also be easy to use. I also like Fallout (3 and 4 are the only ones I have played), and the wrist mounted computer that the hero always wears, called the pipboy 3000, looks like it would be the perfect dive computer. Not only could it be a dive computer, but it also may be a watch, or even an mp3 player while above water. Although the knobs, scroll wheel, and "RT" and "LT" buttons make using it seem more complicated, the size of the unit allows for a larger processer, allowing for a similar GUI as that of the "real" pipboy. Such a GUI would be able to display info in Standard English, such as "Set your nitrox % mixture." and letting you use the wheel to set the air mix that you will be using. I guess that having “confirm” and “back” buttons would help as well. The Geiger counter can easily be used as a depth gauge, which works, as the deeper you go, the more dangerous. The dive computer settings could be where the quest, world, radio, etc used to be, and you can have dive info and other things like reminders where your stats would be. The time could be displayed on the upper right side of all screens except the time screen, which shows the month day and time, which would be where your “weapons” usually are. Other time related functions can be used to fill the sub-sections like stopwatch, timer, etc. There could also be a screen that shows your limb conditions that you can switch to, just like anyone you meet in the game who has a pipboy, you see that screen. All this will have to be water resistant to maybe 70 to 100 feet, made of a hard metal, and fit comfortably. If anyone has any ideas on how to make and program this, or know of any job shops that can make and program this please answer. I know someone can do it, I wouldn’t know where to start looking. I probably made this sound much more complex than most likely is. I am basically looking for a diving computer that looks like a pipboy 3000 and is easy to use. I don’t really need an mp3 player. Again, if anyone has any imput on how to build and program it, or if anyone know any jobshops I can send this request to to have this made, please let me know. this is too good of an idea to forget about. Edit: Thanks to all who answered, And I think just the fact that it IS entirely possible is good enough for me, although price is probably the limiting factor. Thanks again.

Question by Fluffy, the Destroyer of Worlds   |  last reply