Reduced views

I am feeling a little foolish while writing this, but I have noticed that the views per instructables has reduced remarkably. Earlier the instructables featured on the homepage had around 5000-7000 views in a single day and now that number has reduced to 500-1000. for example- https://www.instructables.com/id/Sustainable-Geometry/ https://www.instructables.com/id/Live-Instructables-Followers-Counter/ https://www.instructables.com/id/Wooden-USB-stick/ and i would like to add that these instructables are Fabulous. Not only this, the views on a normal featured instructables has also reduced. Is it because of that, that too many Instructables are being featured? I don't know, but I think something needs to be done to address this issue.. If you agree or disagree please leave your valuable suggestion.   Credits: Wooden USB-stick by X-plain,  Live Instructables Followers Counter by Nikus,  Sustainable Geometry by ENGL212.

Topic by Pranav Jhunjhunwala 1 year ago  |  last reply 1 year ago


Voltage reducer

I have a solar charger that outputs a minimum of 6V. I also have an iriver H300 that has an input of 5V. Does anyone know how I can make a voltage reducer, the link to any instructions or if I can buy one, so that I can recharge the H300 with the solar charger?The link for the solar charger is this: http://www.topraysolar.com/Products_txt.asp?title=20041027113754.htm .The link for the H300 is this: http://www.iriver.com/html/product/prpa_product.asp?pidx=42 .Thank you. :-)

Topic by zedascouves 11 years ago  |  last reply 11 years ago


How to reduce current without reducing voltage

Hi, I'm working on a sign that basically has LEDs as letters. I have 140 LEDs that I'm planning to put in series of 4 each and then 35 in parallel. My problem is that I was mailed a transformer that outputs DC 12v 1.25 A (Actually 12.3V 1.4A). The current is too large for what I need for the LEDs and I don't want them to burn out too quickly so how would I drop the current without affecting the voltage? Any advice would be appreciated, thank you!

Topic by ytan10 4 years ago  |  last reply 4 years ago


how to reduce current ?

We designed a circuit . But it is drawing 70mA of current. I want tot reduce it for atleast 30-40mA.

Question by SunnyJ1 3 years ago  |  last reply 3 years ago


Reduce Electricity Cost?

Does the electricity meter count power used if I only used the live wire and channeled it to an independent earth pit? In other words, I do not complete the cycle with the grid? Power comes in through the live, through meter then to earth?

Question by nabulomi 8 years ago  |  last reply 8 years ago


Reduced Instructable Pages!

We need to be able as a community reduce the amount of pages each project uses. This kind of goes against the stub philosophy, but imagine if you could reduce an Instructable to a single page or even multiple projects per page. If not 1, why not 2, or 3? I see some projects that are overwhelming with information at times. This could also add even more features such as un-selecting the steps that you don't need and poof, gone! There is also the potential for yet more ad views (which means everyone wins) with this service | 1. ads on the service page, 2. ads on the finished page. I've been considering this for years in all documentation that I do, how to reduce pages. However, this will be impossible without the staff at Instructables support and willing to adapt and grow. I also know paper is not the issue it used to be, but that isn't exactly the point I'm trying to reach; for instance sometimes more is really too more. Also, I know I'm new but focusing on that goes against my belief in working agile. Hi everyone!

Topic by philandy 6 years ago  |  last reply 6 years ago


Reducing current to drill

Hey everyone. I'm building a potters wheel for my girlfriend for Christmas, and for the motor I'm using a corded drill. I want to use something like a sewing pedal to control the speed, rather than the trigger of the drill. I've looked it up (on here) and it sounds easy enough, but the problem is that most corded drills are 4 amps and over, and the highest amperage I've found on a sewing pedal is 1.5A, I'm assuming this would blow up the pedal. Is there some way I could use a resistor to reduce the current drawn by the drill? Would the drill still operate on 1/3 the current? It won't need even close to full power. Where would this resistor go? Thanks in advance.

Topic by checkmyusename 5 years ago  |  last reply 5 years ago


Reduce Power Costs?

I need to cut the cost of power I consume in my house so I came up with a simple project which I "think" might help but need more assistance. I put together two motors joined with gears so that as one runs, it spins the other. The driving motor is powered by 3v and the other 9v. When I start the 3V motor, it spins and the 9v motor outputs 7v. What I intend to do is run the 3v from a battery, spin the 9v to produce 7v -9v, save that power to the same battery running the 3v and also use the same saved power to run something else. The above is on small scale. I need to do this on a larger scale later on where I can save 12v and use an inverter to produce 220v. Any advice on how to make the above feasible is welcome

Question by nabulomi 8 years ago  |  last reply 8 years ago


How do you reduce 6 volts to 4.5 volts? Answered

I am working on a toy truck that will play music, have headlights that will light and a gear system that will lift the truck up and down when a switch is pressed. The music (took from a stuffed keychain pig) and lighted headlights (Blue LED) work using 4.5 volts. My gear system use to use 4.5 volts to lift the truck, but now it won't do it. In order to lift the truck I have to increase the voltage power to 6 volts. If I increase the power of the gear system to 6 volts or more then it will fry my music and lights (however, I can make adjustments to the LEDs with resistors). The higher the volts are for the gear system, the easier it is to lift the truck. Maximum volts for the system are 12 volts. I know lifting the truck puts a strain on the system but the more power I give it; the better it can lift the truck. My goal is to use one power source and one switch. I thought I could use to different power sources (6 v and 4.5 v) and connect it to one switch, but I think it will fry of my music and lights. My question is: How do I reduce 6 volts to 4.5 volts, using 6 volts as my main source and connect everything to one switch? If I can get this figured out then this will help me with future project, where I need to use voltage reduction (or is it called voltage regulator). My knowledge of electronics is very low or enough to get me in trouble, which it has done. I am familiar with a few basic electronic terms and formulas. I will except and appreciate any help, ideas, diagrams, etc. Please use layman terms.

Question by mates 9 years ago  |  last reply 6 years ago


Reducing 110v transformer output? Answered

Hi all, as stated in the title I need to reduce the output of a 110VAC transformer. I'm using a US graco spray gun that is 60hz, and I understand that if I reduce the voltage to 90 this will compensate for the UK 50hz system. Any help is greatly appreciated

Question by dimmaz88 5 years ago  |  last reply 5 years ago


how to reduce thickness of leather?

how to reduce the thickness of the leather ? is there any machine available in the market for this job or maybe similar machine which likely accomplished the job ?

Question by ed2mick 8 years ago  |  last reply 8 years ago


how to reduce transformer voltage ?

I have a transformer with 24-0-24v/5A ........but i need only 12-0-12v/5A....how do i reduce to get this voltage

Question by mh.khan92 8 years ago  |  last reply 8 years ago


Reduce current but maintain voltage?

Do resistors reduce voltage or amprage? It's amprage as far as i know. I've got a power supply thag outputs 9kV at 300mA and I need to get it to 9kV at 0.2mA, someone suggested a 450kOhm resistor. When I phoned go get one they asked if I want a quarter watt resistor, what does that mean (1/4, 1/2 watt). I need to reduce the current comingfrom the power supply because I'm using it to power a fusion reactor and the diodes I have to comvert the AC to DC can only handle 0.02mA

Question by JunaidA44 3 years ago  |  last reply 3 years ago


"This helps us reduce spam"

In both FF and IE, under the comment box are the words "this helps us reduce spam," but there's nothing there. And I can't post b/c I get a pop-up which reads "Please type the two words as seen in the image." But there is NO image. In Firefox I have Ad-Blocker Plus, but I don't have it in IE. Nevertheless, I see no image, I see place to TYPE words IN an image. There's nothing there. How are people posting?

Topic by K-all 5 years ago  |  last reply 5 years ago


Reduce speed of an RC motor?

I took apart a RC helicopter and stripped everything so its just the motor operated by remote. I plan on attaching a camera to the end if the motor and my goal is to make a pan/rotate base mount thing. However even on the slowest speed (lowest on the throttle) the motor spins way to fast. Is there anyway to control the speed or slow it down? Please Help

Question by jasonduiella 3 years ago  |  last reply 3 years ago


reducing current on a power supply

So I am trying to reduce the on the current power supply I have from an old router. The out put is 12v DC 800mA (.8A). I want to use it to run a man 12v .3AI just wanted to make sure I did my math right and to make sure I didnt miss anything.Ohms LawI = V/RR= V/I V = 12 I = .812/.8 = 15 ohms resistance in theroy_Current on the fan is .3 A, I am assuming that is the max. So desired current is .25I = .25 V = 12 R is current resistance, X is additional resistance Q=(R+X)I = V/QQ= V/IR+X = V/IX = (V/I) - R V = 12 I = .25 R = 15(12/.25) - 15 = 33 ohm resistance neededSo I would need a minimum of 33 ohm resistor. Am I correct?Sorry for the explicitness of the math, its been drilled into me to show every step.

Topic by dragonkeeper117 9 years ago  |  last reply 9 years ago


Reduce Inbox Spam with Mailinator

I have been using this site for quite a while, and I have decided to share it with those that have not yet found it out.It is called mailinator and whenever you sign up for something that requires an email address, you can choose any name along with the mailinator domain. The upside is that you do not have to make an account with mailinator, and whenever you sign up with the mailinator domain, you just have to go to the mailinator site and type in the name you chose.One downfall is that anyone can use the same name, but all emails are deleted after a few hours (according to their FAQ).All in all, it is great for any temporary use for when you don't want emails going to your main email domain.mailinator

Topic by Brennn10 10 years ago  |  last reply 10 years ago


Reducing voltage in a circut for the layman.

I understand something, but for some reason I am unable to use that knowledge in application to find another answer. Let's say I am building something: (This setup is completely imagingary, so I will use strange numbers.) I have a battery box that has 4 AA batteries rated at 1.5V and 2.7amps (according to wikipedia).   Now lets say I want to hook that up to a LED that has a max 4 volt 20mA forward. I know that I need a resister. I know that V = IR. What I can't wrap my head around is this: How do I change that equation so that is tells me how many Ohms resistor do I need? Because according to that equation if I increase the resistance, I increase the voltage. Becuase were talking about the same source. Do I need to use two V=IR equations and solve for one then place that value in the original.   I just can't get it....maybe I have had too many beers since graduating, or using algeba? I need a layman's way of understanding this...(exasperated sigh...)?

Question by Asmodean_7 9 years ago  |  last reply 5 years ago


Reduce, Re-use, Recycle!

Lately I've been taking my spare time and using it to sit down (or sometimes stand) and desolder stuff from circuit boards. Just from one old computer motherboard that no longer works, you can harvest quite a few fully functional capacitors. For my example I'll post a couple pictures I took a while ago, one is a pile of parts beside my keyboard from an old motherboard I nearly completely stripped except for the sockets and other things I didn't need or didn't have the patience for. Tonight I found 4 more things to strip down, 2 mini power supplies (one from an old xbox, one from a junk tv set top box) and two toasted subwoofer amplifiers (no I don't plan on harvesting the transistors from them). I find it completely wasteful to see all the electronics that go into the landfill, simply because it broke, and from experience a lot of electrical failures are usually limited to one or two parts shorted out or gone bad (although this is not always the case). So this is my little "effort" to help save the planet. Does anyone think I could sell bulk "used" capacitors/resistors/diodes in say, mystery bags with random types of capacitors/resistors/diodes? I'm also doing this for my own personal sanity as I have gone to fix several motherboards in the past that simply required a bad capacitor to be replaced, woopy do, but it does no good if I can't find any parts in my parts bins! What do you guys think!? Also, would someone be willing to help me (maybe through msn would be easiest) identify certain parts I've found that I'm not entirely sure what they do or they're lacking of any useful numbers on them????

Topic by Punkguyta 9 years ago  |  last reply 9 years ago


Need to step down a lead acid battery from 12vdc to 10vdc 350mA

I would like to run a 6pcs 1W white led lights from a lead acid battery. A Single bulb input voltage is 3.2-3.6V & 350ma. I connected every 3 led's in Series (2 Groups) . Can I use 7810 IC or how can I do it. Sir Please send me a diagram . lead acid are in full-charge 14.5v. , in normal 12v, low 10v

Topic by Goldensathiya 5 years ago  |  last reply 4 years ago


Avoiding Unnecessary Conflict in the Workplace

I was sent this advice by a professional body that aims to provide "work life support" - basically trying to cut the amount of stress suffered by UK teachers (in any one year, around a third of serving teachers will have time off sick with work-related stress).  It's good advice for people in a lot of jobs (such as the infamous cubicles of American office life), so I thought I'd share it: Most of us spend the majority of our time at work, so when we experience conflict in the workplace it can have a huge impact on our lives. Disagreements are commonplace in a working environment, and can be helpful in challenging preconceptions and developing ideas, but this can descend into conflict when agreement cannot be reached, and neither party is prepared to compromise. This can be particularly difficult if one party feels victimised, ignored, belittled or intimidated. Often conflict is the result of miscommunication, and the best communication occurs when all parties are listening well. If we feel heard, we are more likely to want to listen in return, and to reach a better understanding of where the other person is coming from. Active listening will help you to hear and understand exactly what the other person is saying, and will encourage them to share more information. To be a good active listener:   •              Stop talking! You might be tempted to interrupt, but try to wait until the other person has finished saying what they want to say. •              Make sure you are giving good non-verbal signs that you are listening. These include maintaining eye-contact, having a good open posture (not crossing your legs or arms), looking interested and nodding. •              Use silence. If you pause for a few seconds before speaking, you may find that the other person has something more to say. •              Try to catch yourself if you're losing concentration. You might be drifting off, thinking about what you're going to say next, feeling sleepy, planning your dinner... •              Check your understanding frequently. You can do this by asking clarifying questions, repeating back in your own words what has just been said, or summarising what they've said so far. Get the other persons agreement that you've understood them correctly - if you haven't, then ask them to repeat what they've said and try again. •              Use open questions (what, where, who, why, when) if you want to get more information and encourage the other person to speak freely. Use closed questions (those resulting in a yes/no answer) to get specific information or to clarify your understanding. •              Be on the look-out for non-verbal signals - do they look tense? Are they speaking more quietly than usual?   ...we now return you to your usual programming...

Topic by Kiteman 8 years ago  |  last reply 8 years ago


How to reduce the voltage of a laptop power supply without reducing amperage? Answered

Hi guys, I have a laptop power supply with an output of 19V, 5.6A. I want to use it to power a small stereo amplifier that needs 12V. I want to make an adapter or something that will reduce the voltage without affecting amperage for use with the small amplifier, but I also need it supplying 19V for the laptop. Is it possible to make do it this way: [19V power brick] --> [adapter/transformer] --> [amplifier]?

Question by Tristan GianP 1 year ago  |  last reply 1 year ago


how do I reduce the voltage from a wall socket (220V) to something less? Answered

I need to reanimate the indoor body of an air conditioning system. right now it just has two wires sticking out for the fans inside. the problem is that when i plug it in the wall socket, it goes on full blast, which is undesirable. it's missing all of it's electronics. it's just the fans and the empty freon pipes inside. how do I reduce the voltage so it doesn't blow so mercilessly?

Question by VALKIR 7 years ago  |  last reply 7 years ago


Decrease plastic recyclables volume, possibly a shredder? Answered

We recycle everything that our county accepts, and by far, the plastics take up more space than anything else.  There is a large amount of air volume inside and between bottles.  I've seen the trick where you compress the bottle and then screw on the lid, but this isn't practical for a lot of containers.  What I would like to see would be some way to reduce a plastic container to smaller pieces that would take up less space.  It needn't be ground into pellets, just cut small enough to reduce the wasted air volume. I've thought of two possibilities, but I'm open to other suggestions.  One is some kind of motorized shredder that would grind/cut the plastic.  The other is a large container, similar to the slap-chopper kitchen gadget, that would have blades to slice the plastic. I have three main requirements.  It must be more convenient than taking scissors or a knife and manually cutting up the bottle.  It must be able to handle most common plastic bottles up to large laundry detergent size, and reduce their overall volume.  The third is it must be fairly safe to use.  We will be adopting soon and I don't want to have to worry about small children falling into the bottle grinder.  :-)

Question by webman3802 9 years ago  |  last reply 8 years ago


"Wonder Wash" DIY Request

So I have been looking for a cheap way to quickly wash small loads of laundry and came across the "Wonder Wash" (http://www.laundry-alternative.com/washing.htm).  The main issue I have with this thing is the $50 price tag.  I know that it is a small amount to pay to reduce your water and electricity needs but times are tight.  My baby seems to go through 5-6 burp rags a day and I don't like using the washing machine for such a small load every other day.  Anyone have any insight on how I can build one of these on the cheep? Cheers Cody

Topic by loki7856 9 years ago  |  last reply 9 years ago


Reduce steel tube diameter by 0.3mm Answered

I am trying to make a DIY CNC machine, using linear rails and the expert advice in the many awesome instructables out there on this topic.  I hit my first roadblock, and I need some help/advice please... The 16mm steel tubes I ordered for the sliding rails wouldn't fit in the 16mm linear slide bearings SCS16LUU that I ordered, they are ever so slightly too big. With a lot of force I could get the rail in the bearing, but it wouldn't slide without extreme force - certainly not the smooth sliding motion it's supposed to be! I've probably ruined the bearings by forcing it in, but I'm not worried about that so much right now (I have spare bearings). I broke out the digital callipers, and the rail diameter measured 16.3mm - that's .3mm more than expected, and more than can fit in the 16.0mm bearings. So now I need to reduce the steel rails by 0.3mm. I have only hand tools at my disposal, and no experience accurately reducing steel rod diameter. I guess another alternative is increasing the slide bearing diameter, but these are sealed bearing units and difficult to get at. Does anyone have any ideas ?  Would it be easier to order new steel? Please let me know any thoughts on this, I'm desperate here.  Thanks in advance,

Question by srah1 4 years ago  |  last reply 4 years ago


I have reached 100!

I have finally reached 100 tips on how to reduce your impact!100 Ways to Reduce Your ImpactAfter many long hours of research...I have made it out. I have reached my original seemingly unsumountable goal of 100 steps. Whooosh. Time to take a breather.Share it with your friends to help them become environmentally savvy.

Topic by Brennn10 11 years ago  |  last reply 11 years ago


When using a step-down transformer (120vac-18vdc), will I need to limit the current going to the motor?

Attempting to modify an old rechargeable battery for power tools into a power source that can be plugged into the wall and inserted into the power tool. I know that step down transformers raise the current, but I am unsure if this will be an issue. Either way... What is the best way to reduce current while not reducing voltage? Is that possible?

Question by gmecomber 4 years ago  |  last reply 4 years ago


betacup - $10,000 prize for innovative ideas for coffee cup waste reduction

58 billion paper coffee cups are thrown away, unrecycled, each year. The betacup challenge is an effort to reduce this waste. betacup are inviting people to submit ideas but also to comment and rate others’ ideas, and engage in discussions with other betacup community members and contest jurors. Thought I'd post this as there are a lot of smart thinking, clever, innovative people here at instructables. Hopefully one of us (or several?) can come up with something positive. Betacup from the betacup on Vimeo. You should consider: Waste Reduction – how does the Idea reduce the number of non-recycled coffee cups thrown away each year? Resources Required – what resources will it take to implement the Idea? (money, energy, water, materials, time, etc) New or Existing Capabilities – does the Idea use existing technologies or approaches? If not, what must be created or invented to implement the Idea? The Whole experience – Don’t forget the importance of the “whole experience”. Alternatives to paper cups are available today but they are not being widely used. How effective is the Idea likely to be in achieving its goal? A different contest format (hint: we’re encouraging collaboration) The betacup differs from most contest formats, because it is open. We are using jovoto, so when you submit an idea, your ideas are open to the public for comment and ratings. betacup via Treehugger

Topic by Jayefuu 9 years ago  |  last reply 7 years ago


is there a way to reduce the power flow of the fan? Answered

Im making something using a fan and it shut my computer taking to much power from the usb is there a way to reduce the power flow of the fan?

Question by CarStalkerZ 10 years ago  |  last reply 10 years ago


7v AC reduced to 6v AC?

Simple resistor? I'm no good with electronics

Question by art316 3 years ago  |  last reply 3 years ago


"Massively Reduce Laser Etching Time"

The guys over at Redtorope.com have been addressing a way to reduce the cost of laser etched/cut projects when having a job done or reduce the wear and tear on one you or your company owns. It's not really a hack or a hardware fix, just an exercise in thinking within the operating parameters of the machine. Really well done and explained in such a way that others will be able to apply to their own projects. Well done fellas!  http://www.redtorope.com/2010/11/massively-reduce-laser-etching-time/

Topic by Culturespy 8 years ago  |  last reply 8 years ago


Can I reduce the frequency of the newsletter ?

Hello all fellow makers ! It seems I can change the frequency of almost any other email sent from Instructables but I can't figure a way to reduce the frequency of the newsletter.  Once a week would be nice.  Is there a way ? Thanks, Guillaume

Topic by aka.guf 3 years ago  |  last reply 3 years ago


How to reduce the 1A current to 0.4A? Answered

I am using an AMS1117 to regulate the voltage at 5V and 1A, and this tension must recharge a battery that accepts a maximum 4.2v and 0.4A I reduced to 4.2V using voltage divider, but I do not know what to do with the current. Suggestions? Thank you!

Question by iDnlSM 3 years ago  |  last reply 3 years ago


is it possible to reduce the hormonics using stabilizer?

I would like to know the possible ways of redusing hormonics in distribution system and also the ideas which are in the researching level :)

Question by albiemorkal 7 years ago  |  last reply 6 years ago


How to reduce LED drain on battery?

I have a Cree Q5 LED, I established the typical forward voltage is 3.7V and the maximum current is 1000mA. I'm confused as to how I reduce the current, I want it to run at 350mA, I know this is possible, I'm just not sure on how to go about doing this. Can anyone point out how I do this. Thank you.

Question by jakespikey 7 years ago  |  last reply 7 years ago


led strip brightnes reduce with resistor? Answered

So i have rgb led strips in my car with rf controller and i wanna add 5cm(3led) but with reduced brightnes while driving and when i open the door to shine ass set from the controller most of the time 100%, so the questrion is can i connect 2 wires onee thru a resistor and the other thru a switch to the door? https://imgur.com/gallery/tkXA2

Question by turbiny 2 years ago  |  last reply 2 years ago


Reducing speed / RPM of pedestal fan

I have a 400 mm pedestal fan rated for 230V 50Hz AC, 120W with minimum 2200 RPM which uses motor coils winding for speed regulation. Its speed and noise is very much even at lowest setting. I want to reduce its speed even further. I am thinking of three options - one - changing the OEM fitted 3.00 micro-farad 440V capacitor with 1.5 or 2.0 micro-farad 440V capacitor, second - using a capacitance based speed regulator (used with ceiling fans) and the third - using a resistance based speed regulator (least preferred option though). Please tell which option will work fine without doing any harm to motor coil? Any other options are highly welcome.

Question by sharmavk83 10 months ago


nintendo DSI black for sale - reduced

I am selling my nintendo DSI black witch includes all of the following: DSI console charger lead 5 stylus's (2 of which are extendible) black case 2 game cartridge storage cases all of the manuals the original box and comes fully charged so you can play quicker it costs £69 for everything you see with free postage and packaging. I will only post it to to people in the UK. it is in a good working condition and has been tested. it is PAL format. if you have any questions or you would like to buy it then please leave a comment or private message me.

Topic by slithien 8 years ago  |  last reply 8 years ago


Options to improve cooling and reduce consumption for portable coolers

I recently had to start learning how to service airconditioners on the fast and that learning got me thinking about my portable coolers.... Some of us like to go camping or on longer fishing trips, so there might be one of those 3-way fridges in use or a better cmpressor model. The one thing they all have in common is that they can only cool down to a difference in ambient temperatures. No matter which way we turn it the cooling produces heat and that needs to get away somehow. The other big thing is the cooling cycling - or the lack of it on a warm day. After some reading and thinking I came up with some ideas that might be applicable to your existing cooler if you are willing to mess around a bit. Let's start with the produced heat, shall we? Down here in Australia most people either have the fridge in their4WD or camper. In a car or small camper trailer there is often the problem of airflow, so the cooler might be doing overtime for no other reason than a lack of airflow. If you check online sites like Amozon and Ebay you quickly find fan systems meant to be installed inside the cooler to get lower temperatures and a quicker cooling of fresh goods. The thing is that the box is quite well insulated and the benefit of the airflow goes only as far as it can reach. And even if the box is quite empty and you would have a benefit of the cold air moving around it won't change the fact that "improved" cooling always comes with more heat in this case. But if we use one of these fan systems to actually improve the airflow on the hot side we not only get better cooling but also a reduce power consumption - something worth considering if you have no backup power generator.... This of course brings us to placement. As I have done the mistake myself you might be tempted to put a 3way cooler onto your seat. Opening it with the back free means the lid always gets stuck on the seat, do it the other way around and you block the airflow. If you do put it on the seat then make sure two things match: 1. The thing is secured properly. 2. The airflow from your aircon is able to reach the hot side of the cooler. Even permanent installations in a camper benefit from a good airflow. Often the fridge or freezer is built into some sort of bench and the airflow behind might be very limited. A simple solution here is to add a vent on top of the bench to allow the hot air to escape. A better one is to use a fan that is powered together with the heating element or compressor and drives the hot air to the outside. How to improve the cold side of the box or fridge? Well, to be honest there is not much that can be done unless you are prepared for some serious work. Depending on compartment size, contents and how full it is a little fan can help to keep the temperatures even but it won't help to get it cooler or reduce the cycling periods for the cooling. The only really working way that I found is to use a "battery" for the storage of the cold. The cooling works by checking the inside temp of the box and if above the set temp the cooling won't stop. This is all well and good while we have a constant supply of power but once we are on batteries it would be great to keep the active time to a minimum. A working solution is to build a container that fits around the cooling element. Smaller types often use an aluminium heatsink, bigger types might come with a compressor and an evaporator. In either case proper sealing is important! Most good models are fully waterproof, meaning even if you would fill them with water they would not leak in other areas than the door. But double check and if in doubt use a bit of silicone to make sure. Ok, but how do we "store" the cold coming from the device? Cold packs ;) These things contain a ready to use mix that holds cold temperatures quite well. Another really good alternative is alcohol or radiator coolant, although the last has limited capabilites in terms of holding capaity for the cold as it is desinged to exchange heat fast rather than to keep it. With a suitable sized and sealed box around the active cooling element we will need longer to actually see any cooling happen (with a warm "battery") but that can be compensated for by good planning or a frozen water bottle. If the cooling element is covered with a box of cooling gel then it has to cool this first before anything happens inside the box. But once it does the pack is already far below the normal temp it would have during normal operation. Remember the inside of the cold pack cools down first before the outside will get cold ;) So once the set temperature is reached the device will shut off. But since the cold pack is far below the set temp it will continue to cool our box until the core is warmer than the set temp. Quick thinkers will now say the benefit is lost as the time required to cool the "battery" down again is much longer than the normal cycle time - and they would be correct. But as we get much colder temps inside the gel box the overall running will still be less compared to normal operation. And since from the second cycle on the gel is only warming up to operating temp of the box it will be much faster than with a warm box. Another benefit might be the ease of cleaning and ice removal. Some peltier driven coolers have big cooling fins or a quite bad design for the heatsink allowing mould to grow where you can't remove it easy. If the box is made from stainless steel and flush with the back wall of the box we won't have that problem anymore. Ok, but how much is good or too much for the size and gel content? You got me there as it is bit tricky. You don't want to loose much usable space for starters and you don't want to wait hours for the gel to cool down if the box was not used. IMHO the size should fit the cooling element with about 20% to spare all around. If stainless steel is not an option than aluminium is the next best choice. Thin sheets can either be be cold formed with a hammer or "brazed" with a good torch and the right rods. Ok, before that route is there anything I should consider or do first? Depends ;) 3-way systems usually use a flame or heating elements to heat an ammoia solution. After years of neglect corrosion can form and reduce the amount of heat transfered into the system and reducing the efficiency this way. It might help to take the heating elements out once a year or so to clean them and the contact areas from any corrosion or dirt build up. With a fixed shedule for this you won't have the problem of never noticing a badly corroded heating element either - and this is the main failure on these systems.... Modifying your camper or making a few mods to your 4WD drawer system is not for the faint of heart and should be done with consideration. The last thing you want to do is rush things to find out it was not necessary. Before cutting holes check if you can't find the room for the fan in a different spot and use ducts to control the airflow - sometimes it is easier to blow air in than to get air out ;) When it comes to creating vents or connections for air to the outside always make sure it is waterproof and insect safe! If you can let the outlet go downwards so water won't run in, for 4WD trailers consider a flap to prevent water from going during a river crossing. Flyscreens will not only prevent insects from coming in but on the inside also prevent dust to go eerywhere - allow to the removal and cleaning! The salts used in these cold packs can be corrosive, so you have to make sure there are no leaks and that there is no steel to come into contact with gel - this includes screw ends hidden in through-holes. If in doubt use a coat of paint but keep it as thin as possible. Even on peltier systems it might be impossible to remove the heatsink without massive surgery on the internals. So before you take it all apart to gain access check if it is far easier to seal around the box opening and possible screw connections using silicone. The cooling battery can be screwed on and sealed with silicone as well as an easy escape route. Although for this to work you need to check if the material of the box allows for a proper bond with the silicone! Some materials just won't allow anything to stick at all, even after sanding them. So do a test first in an area where you would be able to cut the silicone away without causing damage. If you can rip or peel it off the surface you should not try to use a cooling battery screwed to the wall, only use a box that is fully sealed with the cooling element and has a seperate back - one complete unit around the cooling element. I have a 3-way system with a freezer compartment that does the cooling for the fridge too - what can I do? These units either provide good freezing with the fridge temps too low or good fridge cooling with no freezing capabilites - depending on the thermostat used. Our problem is that is next to impossible to add a cooling battery of the normal kind to these systems. The L-shaped freezer box can really only be added with a L-shaped cooling battery from underneath. Only if you don't need any freezing at all you could add a cooling battery to fit into the freezer box shape. In either case the benefit is somehow limited by the way the thermostat is used. If there is no temp control for freezing it should be fine. Warnings... Only peltier driven coolers are free from refrigerants. Every 3-way or compressor system uses refrigerant as evident by more or less piping and heating elements. Never attempt to screw anything into a cooling element containing refrigerant! Even if you think between the channels all will be fine it won't be! The material is just pressed to form the channels and any damage caould mean refrigerant leaking out! Use silicone instead and make sure all surfaces are properly cleaned before applying it, also wait until the silicone is really fully cured before putting any stress on it. As said, these cooling gels can be corrosive, especially if DC voltage is involved. Make sure that everything that is not aluminum or plastic is properly sealed before allowing ongoing contact with cooling gels. Do not attempt any of this if you have to ask yourself what tools you might need or how make a suitable container for the gel. If in doubt check Google on how to work with aluminium or stainless steel if there are not enough Instructables for it. The gel will expand a little bit if it freezes, this no problem in a metal container if you allow for a bit of flex or on the side added strength  - whatever suits you better. Another option is to get a few different cold packs (by the active ingredient) and to do a check in a little container. Freeze it and note whe level cold and warm. Little to no difference means nothing to worry in terms of expansion during freezing.

Topic by Downunder35m 2 years ago


Gadget Graveyard

Ever wonder where your recycled electronics go? From Wired:"Pictured here is the "demanufacturing" center of the company's [Sims Recycling Solutions] Roseville, California facility, where workers disassemble everything from printers, cameras and computers to Jumbotrons for their reusable materials. The facility receives roughly 150,000 pounds of used electronics a day."Wired Article.How to recycle old electronics.

Topic by drinkmorecoffee 10 years ago  |  last reply 9 years ago


how to reduce 5v dc to 2.5v dc?

I need to reduce a 5v power supply to 2,5 v for a certain application, I've got a converter that can do it, but want to do it using some electronics any ideas?

Question by fjchorn 7 years ago  |  last reply 1 year ago


Is there any way to reduce the amount of MB for a video? Answered

I have noticed that my last few videos have been taking up a lot of space. A 1 minute 30 second video takes up 500 MB of space. Is there any way to reduce this capacity so I can upload the videos to youtube faster?

Question by DJ Radio 9 years ago  |  last reply 9 years ago


Reducing home electricity bills by about 50% ? Answered

Can I reduce my home electricity bill by about 50% by using the following method :- Use an inverter to power an electric motor, the shaft of the electric motor rotates the armature of a AC generator with high number coils and powerful neodymium magnets. The generator recharges the inverter.   

Question by Jayvis Vineet Gonsalves 7 years ago  |  last reply 1 year ago


Is there a cheap way to reduce noise from workshop ? Answered

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Question by Squibo 7 years ago  |  last reply 7 years ago


how to reduce current with out affecting the voltage?

I have a 12V transformer and i want to hook it up to my NST but it has a current rating of 8A but my transformer is to powerful and the lowest voltage is 12V.

Question by Jimmy Proton 8 years ago  |  last reply 6 weeks ago


how i can reduce output current?

I have SMPS  with output ratingd 24v dc and 5A.  The other one is 12v dc motor which has max input current is 200ma with load.  How i can connect these both itoms?

Question by ParthP14 3 years ago  |  last reply 3 years ago


Reducing Current While Leaving Voltage the Same

Hey, I have a power source that puts out 5V at about 2A. I need to reduce the current to 1A while maintaining 5V. How would I go about doing this? I thought about a resistor, but since the voltage drop is 0, how would I calculate what value I would need?EDIT: I was also looking at regulators, like this one. It says it limits current to 1A, but I'm not sure if it would be useful for what I need...http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name;=MCP1826-5002E/AT-ND

Topic by msh21 9 years ago  |  last reply 9 years ago


is there a substance out there that once carved reduces in size.

Is there a substance out there that can be carved or moulded that can reduce in size keeping its proportions intact. i know you can get the reverse, a substance that can grow in size keeping proportions intact (Thanks Goodhart). I am trying to sculpt in miniature and its breaking my heart

Topic by maninamousesuit 11 years ago  |  last reply 6 years ago


How can I reduce the signal range?

Any one know how to modify this so that you can adjust the range? Would simply adding a variable resistor to control the input voltage work? Or will I need an attenuator? If so, any ideas how?I would like to manipulate the existing range, not really extend it. https://www.instructables.com/id/Modifying-a-Cheap-Portable-Cellphone-Jammer/?

Question by zosim 7 years ago  |  last reply 7 years ago