Adjustable solder iron

Hello sorry if this is the wrong place, i'm pretty new here. recently i got a 30w solder iron and found this instructable to make it adjustable I know it won't be as good as buying a real adjustable iron but this is cheaper and will work.  I have a little potentiometer that i got from a lamp but unlike most it only has 2 terminals and a space for a third. i did some experimenting and it seems to work fine, the 2 terminals are a middle and one to the right then a space to the left i hooked a wire in the space and it basically worked in reverse to when it clicked off it turned the (in this case) motor. so my real question is how do i wire this up, can i just wire the "hot" wire threw the pot and will it work to make my iron semi adjustable the only info i have on the pot is that on the top it says B500k i can take a picture of it if needed. 

Posted by chairsgotoschool 5 years ago

Universal (adjustable) Rechargeable Battery Power Supply?

I would like to build a battery power supply that has these features: * holds some number of commonly available alkaline or rechargeable cells (AA or C since those are pretty common) * has adjustable voltage for 3V-18V (or whatever might be practical) * has adjustable current 100mA-3A (again, whatever is possible) * batteries can be recharged by plugging in to normal AC outlet * can still function as a power supply while charging (perhaps via AC?) Is such a thing possible? With phones, iPads and other items that are battery powered, it would be nice to be able to power a few accessories via battery and not need to recharge (i.e., be able to load fresh batteries) if on a remote recording session (for example). I don't know much about electronics, and would need a higher degree of hand-holding for parts selection and other stuff. I am good with a soldering iron and have done a few DIY projects and kits that have all worked fine.

Posted by stubbsonic 5 years ago

Ideas on how to mount an iPad to a child's wheelchair?

Does anyone have any ideas for how to mount an iPad to a child's wheelchair...also making sure it is adjustable to be able to get the child in and out of the chair?  Also, any ideas on how to attach a stylus so that it doesn't get dropped or lost? As you can see from the picture, the way we have it isn't working out so well.  Thanks in advance!

Posted by mom2maddy 7 years ago

Adjustable Keyboard Tray

Trying to figure out how to make an adjustable Keyboard/Mouse tray for ergonomic purposes. Seems like it might be relatively easy with some kind of flexible tubing e.g. flex eletrical conduit. and piece of wood for the tray. Very surprised to find near 0 content on the web with this, especially since these trays aren't exactly cheap.

Posted by jtrimmell 6 years ago

Adjustable bed remote fix

I  will have to throw away, at much expense,  and replace a terrific adjustable bed because no one seems to know how to fix the remote control broken red bulb.  After a trip to and from the supposed specialists in WinstonSalem N.C., it came back with NO bulb, and both a screw and a small piece missing!  When I called, he informed me it was working when it left there... How would he know WITHOUT  the bed?  Top that with him insisting it 'doesn't NEED the bulb to work'.   Any advice on what bulb  for a 9 volt, and precisely how to know circuit board terminals ?  

Posted by 10TanToes 1 year ago

adjusting brightness in you tube

Is there a way to adjust brightness in you tube videos

Posted by pops1943 10 years ago

Adjustable sights anyone?

Is this the first knex adjustable sights?

Posted by Katarukito 10 years ago

Husqvarna chainsaw carburetor adjustment tool

I just worked on a Husqvarna 142 chainsaw for a friend. Yes, there are openings in the side of the machine so the Low and High carburetor screws can be adjusted, but a special tool is required, or parts need to be removed from the saw so the screw shanks can be grasped with a pair of needle nose pliers. A special tool is svailable for about $6 US. It fits over the longitudinal ridges on the upper part of the screw shank. I discovered the right size of semi-rigid plastic tubing makes an effective adjustment tool. Just cut a length three or four inches long. Push one end onto the desired screw shank and turn to adjust. The tubing is rigid enough that it does not twist, but turns the screw needing adjustment.

Posted by Phil B 6 months ago

ATX PSU to Work Bench PS - Adjustable Voltage and Current question

I am working on converting an old 600W ATX PSU to a bench power supply for me to use for some lab work.  Not everything that I will be plugging into it will have built in current limiting capabilities.  The guide/setup i found on here that I will most likely be following are:  & The first link is how I would like mine to end up looking. My PSU is rated as: +3.3V @ 32A +5v @ 50A +12v @ 24A -12v @ 1A -5v @ .5A My end goal is to be able to control the voltage and current output from each binding post.  I will be hooking up a multimeter to this as well and am thinking that i could control what it monitors by some dipswitch setup or switching setup(as far as to which binding posts it's monitoring). I do understand that V = IR.  So keeping 5v but only wanting 3A, i would increase the resistance which is why at first i thought i could play a POT in the circuit.  However after seeing how the voltage regulation was hooked up, I am confused how to do so now since it was connected in the fashion i thought i would need to control the current.  ( I would probably use a LM338 since it would allow for more current but again, i would love to be able to have the full 50A available all at one shot but i don't think those IC's allow for that. I am extremely new to all of this and am still learning as well, so if i was able to communicate what i am looking to do correctly and you have a way of explaining it to me, a picture would be awesome if you have the time to create one. :D TYIA for any suggestions.

Posted by agentc0re 7 years ago

Adjusting to a New City

I just moved to San Fran from the east coast and don't really know too many people or places here.  Does anyone have any good tips on how to adjust to living in a new city?  Places to go things to do, etc...

Posted by Carleyy 8 years ago


Can anyone help me with an obsolete, old school circuit board adjustable bed remote control? it worked til the last fall that cracked off red bulb. I'll pay someone to fix. And to please  not make it worse as the remote 'experts' in Winston Salem did. Hope all photos are showing here....the red bulb is now completely missing.

Posted by 10TanToes 1 year ago

Adjustable Bridge

I have an Epiphone acoustic guitar that I really like, my girlfriend gifted it to me after her uncle gifted it to her (she doesn't play, fingers are too small). It's the FT-130. It basically has two large screws, one on either side of the bridge, If anyone is familiar with this style of adjustable bridge can you please either tell me how to use it or send me a link to a site that will? the action is pretty low on the high strings and I'm getting a lot of buzzing (more than I should). Thanks for any help you can give!

Posted by HAL 9000 10 years ago

Trying to create a circuit to allow me to adjust the frequency of AC power

I'm trying to design an EM field generator with adjustable frequency. I've got most of it figured out, but I can't seem to find anything about how to create adjustable frequency AC power. I've got two designs I'm working on, one that is DC powered and one that is AC powered, but the best I can do on either ends up with a 60Hz EM field. I'm looking for adjustable frequency, ideally from 0.1Hz to 50kHz, although I'll be pretty happy to even get any range of frequencies at all. The range from 0.1Hz to 500Hz is the most useful and interesting in particular for my purposes, but any help on figuring this out at all would be much appreciated.

Posted by PsychoHazard 7 years ago

Adjustable, bluetooth, etc.

I am trying to figure out how to control a device that will be "off" while in the range of a transmitter (short range...under 10ft) and then turn on when it goes beyond the range of the signal. I would also like it to be an adjustable range. I was thinking the device would be "on" constantly as the transmitter tells it not to activate, but once it leaves the signal range it would activate.  Any thoughts? Thank you in advance.

Posted by milkyway312 4 years ago

Instructable on how to adjust/align bicycle caliper brakes?

Does anyone have (or could easily post or direct me to) an Instructable on adjusting old-style caliper brakes (the kind with two arms on a central sprung pivot)? I found Bicycle Tutor's video on cantilever brakes, but nothing for my specific need. Google came up with mostly cantilever-brake stuff, and the few caliper-brake Web pages were not very clear.

Posted by kelseymh 9 years ago

LCD temperature logger

A temperature logging system based on Arduino that outputs to a 5" color LCD.  Accommodate multiple inputs, and display simultaneously in different colors.  User adjustable time span on the LCD, user adjustable temperature ranges.  Would be great for a weather station and other apps.

Posted by LesB 3 years ago

Home page adjusted

Well, the last home page change wasn't quite as successful as we'd hoped.  We heard people saying that they didn't like the moving pictures, and wanted the titles visible, without having to hover.  So I've just pushed out some modifications that change those things.  We hope the current version is better!

Posted by rachel 7 years ago

Tongue and mouth model.

I work at a speech training center, and I need to illustrate how to make certain sounds. I thought the best way was to use an adjustable tongue and cheek model. Doesn't have to be a real replica of a tongue, just something to illustrate the tongue and cheek positions for different sounds. Needs to be adjustable. Any ideas? Thanks.

Posted by naim 8 years ago

Help finding adjustable and slip resistant material!

I am working on a project where I want to be able to paint with 5 brushes of different sizes simultaneously. For this, I need to build a device that can hold 5 paintbrushes together, one next to another with a 0.5 inch gap between them (so the bristles don't overlap). My challenge so far is to find a clamp or material that can adjust to various sizes of handles while keeping everything still when I push down to paint.  I have tried to poke the brushes through a piece of foam but they will slip and go through (depending on the shape of the brush). Someone suggested duct tape but I'd like this device to be reusable and easy to change between brushes.  Basically, can anyone suggest an adjustable clamp or some better material that can fit various diameters and hold still?

Posted by Julep 4 years ago

Adjustable Voltage on PSU ATX

I have an old Rockford P450.4 amplifier that I salvaged an LM317T and LM337T from. It also had some two (2) potentiometers that I salvages as well. I have a 400W Coolamx PSU ATX that I turned into a bench supply. I have read that people have been using these two (2) IC's to maintain a constant voltage through variable adjustment. I have seen several tutorials on instructables, but that all lack clarity, instruction and do not provide enough detail. I could really use a good tutorial, but have failed to find one of great interest.

Posted by bprins 2 years ago

Adjusting thong size

Hey all! I have this problem, where all the thongs I get with outfits are too big for me. But, seeing as I love matching outfits, I really hate to throw them away. Yet I just can't figure out how to make them smaller. It's killing me.  Any help would be much appreciated. Thanks!

Posted by kssmedeadly 5 years ago

How can you adjust timezones?

OK, everytime I see a comment, the time is very diffrent from mine.I just posted a comment. My time ( checked ALL of my watches) was 7:03, yet on instructables, it said 3:03I was wondering if I could do anything so that my times match? Perhaps on Instructables or Firefox???

Posted by Keith-Kid 10 years ago

DC Motor speed controler

Hi all Can anyone suggest the best way to replace the variable speed trigger of a 18v battery drill, with a remote from the drill adjustable speed control. I want to control the speed and have it stay at the setting until I turn it off or adjust the speed. The drill will be clamped to a board with no battery and powered by a power supply. Thanks for any advice Les

Posted by Les1951 3 years ago

internet security

Is there a means to review and adjust our personal account security settings for this site? i.e. privacy concerns 

Posted by Hudson-108 1 year ago

Free energy via adjusting buoyancy- why not?

Hypothetical setup- a floating object which can adjust its own buoyancy via ballast tanks full of air (if it's a submarine) or compressing/expanding a helium bag (if it's a blimp).  Naively, it feels like the amount of energy you could harness by letting it float and sink is a lot compared to the amount of energy required to adjust the buoyancy, but I'm starting from the axiom that free energy is impossible so I must have made an error somewhere. If we take the example of a submarine, is it that filling the ballast tanks with air effectively raises the sea level by a tiny fraction, and that water's potential energy is what makes the submarine float upwards? I guess in the case of a helium balloon, the act of inflating it pushes the atmosphere upwards and that is what provides it with lift.  This question was prompted by a Youtube video of a hybrid helium-balloon-airliner that used buoyancy to reach altitude and then glided back downwards, which made me think "that's quite a neat idea... hang on... where does the energy come from?".

Posted by PKM 7 years ago

my knex car

This car to me was the best one i had ever made becuase it had steering and adjustable seats and etc

Posted by julian2596 9 years ago

DC Polarity Shifter / changer

Require assistance to build a device to change the polarity of 13-14 volts 30 amps with an adjustable timer. Any help would be appreciated.

Posted by NickMac 10 years ago

Adj. Temp Sensor

I am looking for a 12V adjustable tempurature sensor that will provide a trigger output when the temp exceeds the setting. Can anyone help ?

Posted by daveyandgolie 11 years ago


My UPS is designed to run on 36v Dc input. Can i be able to use a single 12v battery for it to run? if not is there a way i can adjust the input power to 12V?

Posted by Patricemutua 10 months ago

Pre-historic Video Amplifier Antennas useless?!

I've been learning quite a bit about video amplifiers recently. And it's brought me to a question. When antennas were the source of video-signal, you would often hear horror stories of people having to get up off of their couch to adjust the "bunny ears", to get a clearer signal. I'm just confused. Why would they have to be adjusted? The signals, if my understanding is correct, is electrical signals sent through the air, and the signal would cover thousands of feet. It surely didn't matter if the antenna was all but a few inches from one spot or another. The signal should be able to hit it just the same no matter what, correct? If you are in a car, it's one thing - you're moving. But in a house, you're stationary. Any explanation?

Posted by freethetech 6 years ago

Missing Photos from Instructable

Can someone tell me why some of the photos of my instructable are not being displayed?

Posted by MaskMarvl 5 years ago

In the Pipeline

I have some parts on order and will be adding two more instructables in the near future. 1. Cascading multiple squibs with adjustable delay. 2. A miniature trigger module with increased sensitivity.

Posted by Crosius 9 years ago

What's the name of this brass part?

This is on an adjustable length cane, where this thing can be pushed into the inside of the tube to adjust length of the cane, and pushed out by a spring with a "click" sound to lock the length. This is also on kayak paddles to select and lock the angle of the paddles. In fact, this is fairly common and used in many other places... But I don't know its name. I want to use this on one of my project and I am not sure what name should I use to search for the parts. Anyone can help? Thanks!

Posted by ccyg8774 1 year ago

IR Jammer

Could some please show me how to build an IR jammer? I want one that broadcasts at all frequencies, as to not have to adjust it for each IR reciever. I would be most thankful.

Posted by James (pseudo-geek) 11 years ago

Vdc to Vac

Hi there hope someone will have some info....anyway what I'm after is a schematic or similar for an inverter 13.8Vdc to 2000Vac with a variable square wave oscillator so i can adjust the frequency possibly incorporating a 555 will be @ 50% duty

Posted by Narnies 10 years ago

48 volt power supply

Hello everyone. i am interested in building a power supply from 0-48 volts and able to push a good amount of amps. any one have a ruff idea on how to beable to adjust the voltage and not limit my current to 2 amps i would like to puch say 15-20 amps. i can build the rectifier i have a 600v i think 30 amp bridge rectifier. just not sure on how to do the adjusting without useing a regulator chip that only pushes a few amps. any help would be greatly appreciated.

Posted by omnacron 4 years ago

Vertically Adjustable TV Wall Mount

I am in need of a vertically adjustable wall mount that would hold a 32" LCD TV and raise/lower the tv with 12-24" of travel. I live in an apartment and am on a tight tight tight budget, so I am trying to dual purpose a TV to be both computer monitor and bedroom television. My problem is that when the TV is sitting on the desk, I have to look between my feet to see it from the bed. It just isn't comfortable viewing. If I were to mount it at proper viewing height from the bed, I would be craning my neck to see it. I have scoured the internet and the only mounts they make like this are as expensive as another TV.  I am a novice at this kind of thing, so the simpler and cheaper the better. If I could mount some sort of track to the wall and use a heavy pin to set the height or something like that, that would be an idea. Any help would be much appreciated! Thank you,  Sean

Posted by SlyBlackDragon 4 years ago

Speed Control for AC Electric Motors

Can anybody tell me how to build a controller to adjust the speed of an 110VAC electric motor, ( ex: blower motor, fan motor ) I was cautioned about using a light dimmer. bill

Posted by broham 11 years ago

Instructables editor? Why can't adjust text box size??

Hey! So I'm on a mac, using Safari and Chrome. So like when I'm typing this post right now, in the corner of the editor is a little drag button that allows me to make the text box bigger. When you're making an instructable, the little arrow isn't there, so I can't make the editor box bigger, and it's a real pain when I have to keep on scrolling up and down. Plus I cant see my whole step at once.  Is this a Mac bug, or is it just a feature lacking?

Posted by HavocRC 5 years ago

Block and Tackle Help - Adjusting Lift

Hello, I am working on a project that will lift up a flap, that is mounted to the bottom of a screen door, when the door opens. I am using a block and tackle to do the lifting when the door swing open. Everything works as expected but I would like the flap to travel more, move up/down more but I am not sure how to accomplish that. I the attached image, the red X's indicates a non-moveable part. The 2 black circles are pulleys. The yellow line is the rope. The green up/down arrow is the part that I would like to raise up higher. Is there a way to do that without getting too complicated? Thanks!

Posted by sdtacoma 1 year ago

cort curbow 5-string active bass buzz

Hi i recently bought a cort 5-string active bass and the strings buzz alot more than they normally should,i tried adjusting the bridge and sadddlesbut i just cant seem to work the buzz out completly,it was buzzing up to the 12th fret but i got it down to 1-3rd frets.ive tried everything i know,i even went to the cort website,they have factory specs on heights and adjustments but i dont know too much about that stuff.any ideas or tips would be awesome,i have to use this bass soon so PLZ HELP ME

Posted by jmanuel1 7 years ago

Long Exposure Photographs

Does anyone know any computer programs, for Windows or KDE Linux, that can take long exposure pictures from a webcam? I have a professional 6 MP camera, but the shutter speed can only be adjusted to a maximum of 1.6 to 3 seconds.

Posted by ongissim 11 years ago

single speed scooter throttle conversion?

I have a scooter controller that requires a three wire throttle. could i just splice two of the three wires together to make it a single speed? the three wires are labled as: voltage ground speed adjusting signal

Posted by budsiskos 9 years ago

Broken Sennheiser HD 435 Headphones

I recently broke my headphones, snapped clean through the adjustable bit between headphone and head band, and wondered if anyone had any suggestion of what to do with them? I've already tried glueing them and that failed.

Posted by juicebarjoseph 10 years ago

What is this red sleeve called in the attached picture of an impeller blade?

Obviously the center red sleeve is for adjustment over minor difference in the shaft diameter.  Can you please tell me the technical term used for the red piece? Thanks.

Posted by kabira 3 years ago

arduino Questions

Silly question. Trying to build something that requires an arduino to take a temperature measurement, and pwm an Item dependant on that temp reading. so the question is how many reads and adjustments per second can I aim for? I was hoping to get the 1 MHz area but am assuming less than that at this time

Posted by plucas1 1 year ago

LED Circuit Help

Https:// I would like some input on making this using a 555 timer and POTs to make an adjustable fade in/fade out circuit while running on a 9v battery and using a pressure switch to turn the LEDs on when the box is opened.

Posted by YoungOne453 4 years ago

Help with dc motor and potentiometer! Thanks

OK so my dad has this old turntable and I got him some cool records for Christmas and I tested them out and it sounded good but now the motor isn't working, its kinda temperamental. I know the motor works because i tested it separately with a 9V, i guess the wiring is just kinda old and faulty. Any way my idea is to put the motor on its own independent circuit and adjust its speed with a potentiometer. Its one of those small DC motors 12V. I was thinking about hooking it up to a battery pack and a pot to adjust the rpm, I could mount the knob on the face of the player and adjust it until the music sounds just right. Then i could make a mark for 33 rpm and 45 rpm so he can change records with just a twist of the knob. Or slow them down and speed them up just for fun lol. How can I wire all this? I did some googling and tried with a couple pots and motors I've harvested over the years but all the pots seem to smoke and sizzle with only a 9V battery. Do I need a different pot? Please help! thanks  

Posted by sticitodaman 6 years ago

(newbie) materials to build a sliding "inverted-L" stand / pole

Hi folks!Just discovered this fantastic website! I have this very cool idea for a 'ible I am working on and cannot wait to put it on the site. For now and as a first step (sorry, I am a newbie!), I am simply trying to build a simple stand with the following "inverted L" shape:- - - - - - - - - - - - - -||||(floor)Think of tje coat hanger in the picture below, only sturdier and with a single vertical pole (and without the wheels/mesh at the bottom). Also, the vertical pole does not need to be telescopic: as long as I can adjust the height of the horizontal pole I am happy. This could be done eg by mounting the horizontal pole on a "tee" fitting; but then how do I make it fix into a given position/height on the vertical pole (and still be adjustable)? (I had a look at this 'ible -- -- , but I don't understand how the tee fitting gets fixed into position: welding?)I am thinking of using pipes or PVC from a hardware store. My big question is: how can I get the vertical adjustment feature using such readymade materials? Thank in advance for any help!James KirinPasadena, CA

Posted by james.kirin 9 years ago

Ned help wth plans for a turret

I'm creating a remote controlled coil gun turret that autoloads, and is able to adjust aim in any direction using the remote control. I can figure out the spin aspect of the turret pretty well, but I'm having issues incorporating the vertical aspect to the barrel (to adjust the angle of fire), the only ideas I have for this seems too elaborate, I was wondering what people that had approached the idea previously had attempted. I'm ignorant to the working of turrets in general, this includes any terms associated with them, but I do have the rest of the gun figured out for the most part, I'm researching the turret before any construction begins, so I can put it together correctly. I'm 15 years old, and willing to learn, so any help is appreciated.

Posted by silly_world 10 years ago