Instructables: exploring - photos - technology - battery Mon, 27 Jul 2015 18:55:01 PDT BLOX v1.01 Voltaic Systems Build Night - Wireless Wiki AssentWorks Voltaic Systems Build Night Our makerspace submitted two concepts for the Voltaic Systems Build Night. The first concept was an automated battery charger that cycles through AA or AAA rechargeable batteries processing each battery, the second concept was a wireless wiki that could be accessed by ne...
By: AssentWorks

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Wed, 30 Apr 2014 23:21:54 PDT
Li-ion Battery Indicator jumate Here is the single cell lion battery indicator. this indicator will show the status - low as red & usable voltage as green. This instructable can also compatible with 4V - 4.5V Lead Acid Batteries.
By: jumate

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Sat, 15 Mar 2014 04:31:18 PDT
Simple 5v battery backup circuit victordas It’s a simple 5v battery backup circuit with constant slow charging facility. Its mostly suitable for microcontroller projects where we need constant current source without any cut-out. Whenever mains fails the battery takes the load without any delay again when mains restores batter goes to chargin...
By: victordas

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Thu, 23 Jan 2014 23:41:27 PST
Jeff-A cheap and simple Ic robot British Badger Jeff took 5 weeks to compete and is a simple IC robot. Jeff's main thing is the led headlights witch come on automatically when it is dark. It works by having what is called a current see sore witch when the current is higher on the Ldrs side compare to the Variable resistors side it puts power to c...
By: British Badger

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Sun, 17 Nov 2013 08:50:35 PST
Testing batteries with multimeter mmmmqc Find out how much power is left in your batteries using a multimeter. Here I test AA batteries but you can test AAA and other size batteries. This was done using the multimeter device at TechShop San Jose. They have an electronics workstation with multimeters, soldering iron and other tools for wor...
By: mmmmqc

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Sun, 27 Oct 2013 01:42:17 PDT
Decoration for your room- LED chimes !!!! Prosenjit01 Hi, Introducing LED Chime decoration.... Watch the video........ here is how I made an LED chime for my room..... This is a parallel connection circuit with every LED connecteed via 1K resistance.. It has 12 LEDs(10 RED, 2 BLUE), 12 1K resistances, it needs 4-9 volt...
By: Prosenjit01

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Mon, 8 Jul 2013 09:20:45 PDT
My Robot Tank rptech Check out my cool new toy guys, I (a high school student) created this magnificent monster from scratch, that's right from scratch (all parts were designed and created specifically for this project -- and the instructables contest). At first I designed 3d models and created blueprints of the chassi...
By: rptech

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Thu, 27 Jun 2013 16:53:05 PDT
3d printable clock Jazzy13 This is a 3d printable clock that I have designed on tinkercad. The numbers on it are holes in the orange part and show up on the red.  The holes in between the numbers go all the way down. The hole in the middle are for clock hands. I have designed it with a ring on the back so it may be hung up. I...
By: Jazzy13

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Fri, 24 May 2013 14:45:30 PDT
9 Volt Rechargeable Mini MagicMarilia Led Flash-light (awesome blinding 600 lumens power in your palm) MagicMarilia I embarked upon this project due to need, but it turned out well due to results. I hope you will enjoy it, as much as I did and get great power in your palm of your hand and best thing is you can recharge it. And keep the power for long long time. Below I've outlined everything you might need. Bel...
By: MagicMarilia

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Fri, 12 Apr 2013 11:12:14 PDT
12 volt charger/ 12 volt DC power suply GhoustDoggy I've made this 12 volt DC suply for testing stuf that I made. I used 220 V to 12 V transormer and simple Graco's compound. If you are not expert dont try this at home the 220 volt is more than enough to kill someone. For base I used old PC power suply I dril holes for switch, and LED. --------------...
By: GhoustDoggy

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Wed, 3 Apr 2013 05:31:55 PDT
homemade electromagnet tealk quick, just 30 sec. project(if i can call it "project") things you will need :  -1.5 volt AA battery  - copper wire  -nail or screw first  take a wire and wrap it arround the screw  take one end of wire and tape it to + end of battery , and  2nd end of fire and tape it to - end of battery and there...
By: tealk

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Sun, 31 Mar 2013 07:56:56 PDT
Replace Sansa MP3 player Poly battery with rechargeable piggyback. C200, C250, Clip, View graphixv I recently had a Sansa C250 mp3 player with a battery go out.  When I went looking for a replacement Poly Ion battery, I was shocked how much even a third party battery costs.  It was about half as much as I had paid for the entire player! Knowing that buying no name ion batteries can be a crap sho...
By: graphixv

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Wed, 13 Mar 2013 13:57:37 PDT
Custom Built Micro Hexacopter Frame Ben The Builder As an avid RC-er I had always wanted to build a multrotor, however it seemed too daunting. I met a kid at college that helped me through the process and I am now addicted. This is my 2nd multirotor with the first being a large quad built on an x525 V3 Frame run by an aeroquad mini. When Hobbyking ca...
By: Ben The Builder

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Wed, 30 Jan 2013 21:33:35 PST
Curiously Strong, Clear Skies- Astronomy Altoids Tin Flashlight envirolutionary What another Altoids flashlight? Yes, yes indeed. I wanted to share some of the things I have made because of the Instructables community! I made this flashlight for a star party I attended. I have made a few modifications, as this was my first rendition. I used the “Make an Altoids Flashlight” i...
By: envirolutionary

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Tue, 29 Jan 2013 11:41:43 PST
Blackberry Battery Canon Camera Ring Light Hack edy This is my first Instructables post. I apologize for the formatting issues. I wanted to put text in between the images but this only allows me to make boxes with captions on the images. I hopefully will learn how to layout better in the future. The images show 3 camera hacks as follows: 1. R...
By: edy

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Sun, 20 Jan 2013 18:49:52 PST
Charging Station in Travel Case dc-labs We have multiple chargers and three Canon plug-in chargers to look after. It seems we can never find the charger from the pile of tangles wires that was labelled "adapters" so this was the next logical step. I wanted to call this "Off to Grandma's House" as the option of being able to pack it up and...
By: dc-labs

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Sun, 6 Jan 2013 08:28:06 PST
Power PSP Using AAA batteries cgmalantonio I found my old PSP when cleaning my room and decided to see what i could still do with it. My battery was completely shot and therefore i couldn't update it to play any games on it (Fat Princess :) best game ever). I decided to take the battery apart and see what i could do to get it working again. ...
By: cgmalantonio

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Thu, 15 Nov 2012 20:00:13 PST
modified camera battery-compartment clasp man-of-light this camera's two AA batteries over time had worn away the clasp that held the door closed. amongst other things i tried making a new clasp by heat welding a plastic strip from an id card into the door. it was kind of like a mortise and tenon joint but failed due to forces from the batteries wanting...
By: man-of-light

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Wed, 14 Nov 2012 12:01:37 PST
9v battery status indicator circuit victordas This is a 9v battery status indicator circuit.One of my friend asked me to build this as he wants a 9v transistor radio battery status indicator. Thats why i build this circuit it works great and another thing about this circuit by changing the 'ZENER diode" you can rebuild this circuit for other lo...
By: victordas

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Mon, 29 Oct 2012 08:26:37 PDT
Simple Ni-cad battery charger with Led indicator victordas This is a simple Ni-Cad battery charger circuit with Led indicator. it's not a automatic charger but when the battery is fully charged the led glows and you have to turn off it manually. use a 3mm red led and for power supply use a 9v transformer. I have build this circuit and it's working great wit...
By: victordas

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Sun, 28 Oct 2012 21:52:28 PDT
Geek LED Belt Adambowker98 After seeing the 'ible "LED Belt" by Doctor What, I decided to make my own belt. It is basically just a belt that lights up when you flip the switch. Here's how I made it: 1) Get a belt. 2) Mark a hole in the center of the belt. 3) Mark holes (evenly spaced) down the rest of the belt so that you...
By: Adambowker98

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Tue, 23 Oct 2012 16:29:35 PDT
Ever-Lasting Solar/Battery Operated Clock Design SharadScience The idea behind this clock was to design it in such a way that one never has to change the batteries. I have a few clocks mounted high on the wall and it's always an inconvenience to replace those batteries. In this scenario, I'm planning on integrating a solar panel that I rescued from those solar ...
By: SharadScience

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Fri, 12 Oct 2012 20:51:25 PDT
Battery Voltage Indicator Autonomous96 Background: A year ago, heavy rain and ice overnight caused Skimmer (my small motor boat) to capsize due to failure of the bilge pump battery. In order to prevent this disaster from re-occur I made this indicator to monitor the bilge pump battery voltage status. The LED light mounted on the dashboar...
By: Autonomous96

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Mon, 17 Sep 2012 23:54:33 PDT
CLEAN out Battery LEAKAGE, +/or DRY out Wet ELECTRONICS Toga_Dan When batteries leak, they can corrode electronic components. I thoroughly clean the affected parts with a toothbrush and dishsoap. Depending on how far the chemicals have gotten, I may neutralize battery acid with baking soda. Both acid and alkaline battery chemistry can be neutralized with milk. Th...
By: Toga_Dan

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Mon, 20 Aug 2012 23:57:06 PDT
9V Battery Snap Connector from Scrap UConTroll Next time you have to replace a 9V battery, UpCycle it before you recycle it.  I'm always building battery operated devices and never have enough battery holders or connectors around.  But I've found a quick and simple way to make 9V Snap connectors from discarded batteries. 1 - Carefully remove th...
By: UConTroll

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Mon, 20 Aug 2012 06:49:10 PDT
Easy Conversion : AA to C (Or Any Other) Cell Siddharth Jain Now, there are already many instructables for the same purpose, but, there isn't any this simple!!!.... After reading this, you shall be able to transform any cell type to any other cell type, given that the former is of the smaller size!!!...(I needed to transform an AA cell to C type for my wall ...
By: Siddharth Jain

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Sat, 18 Aug 2012 13:52:39 PDT
Bike with 12volts pbtech This simple circuit allows a 12V battery pack (10x nicads in the bike seat stem) to be charged via a bike generator. The generator is rated at 3W and with this voltage multiplier circuit provides about 200mA at about 15km/h. A 12V system was chosen because it allows the use of a car horn (get notice...
By: pbtech

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Wed, 15 Aug 2012 07:19:50 PDT
Save $$$, Get A Like New Laptop (or other) Lithium Battery Pack For FREE! ruggb Well, you'll have to work for it so it isn't totally free. Basically, MANY lithium battery backs can be reset back to almost new condition. I don't fully understand the reason the "smart" internal controllers become dumb and require a reset. I also don't understand why manufacturers don't provide th...
By: ruggb

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Tue, 14 Aug 2012 12:42:35 PDT
LiPo-Powered Arduino Radioactive_Legos Let's face it, 9V batteries suck.  They don't last long, they're expensive, and did I mention they don't last long?  I work on and run several electric RC cars, and because of  this I own a lot of Lithium Polymer (LiPo) batteries.  Nowadays you can get them for pretty decent prices, and if you know ...
By: Radioactive_Legos

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Wed, 8 Aug 2012 17:23:30 PDT
Connect as many batteries as you need without a battery box alanamon I am always trying to test something that requires more than one battery and was never able to hold two or three batteries the wires and whatever I was testing at once and still have it work - so never able to test.  No More! Now i just stick a neodymium magnet in between batteries and one at eithe...
By: alanamon

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Thu, 26 Jul 2012 09:35:42 PDT
How to check AA/AAA alkaline battery using a voltmeter msurguy We all run into a situation when batteries in our remotes, toys, keyboards/mice run out. If we don't know how to check a battery we might throw out a perfectly fine battery (especially when we have a pile of them somewhere in the drawer).   This electronics tip has to deal with checking common alka...
By: msurguy

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Wed, 11 Jul 2012 15:24:20 PDT
Reverse polarity protection for your circuit, without the diode voltage drop. ccrome Ever blow up a circuit because you reversed the polarity of a battery?  Or got one of those pesky center-negative AC power bricks?  Or even carefully connected your circuit to a bench supply, and still got the leads reversed? Well, I have.  It can ruin your day.   The easiest way to protect your s...
By: ccrome

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Tue, 10 Jul 2012 08:32:28 PDT
DIY 9V Battery Clip razvan_iycdi Hi, people! In this instruct able I will show you how to make a 9 volt battery clip out of... a 9V battery :)... and some wire. So, let's get started, shall we?
By: razvan_iycdi

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Mon, 9 Jul 2012 18:01:05 PDT
Powering Arduino with a Battery amandaghassaei Make your Arduino projects portable by using a battery for power.  From the Uno and Mega documentation pages: "The board can operate on an external supply of 6 to 20 volts. If supplied with less than 7V, however, the 5V pin may supply less than five volts and the board may be unstable. If using mor...
By: amandaghassaei

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Fri, 6 Jul 2012 15:24:58 PDT
Test the Strength of a 9V Battery With Your Tongue amandaghassaei Wondering if your battery is running out of juice?  Stick it to your tongue briefly to know for sure. First inspect the battery for any noticeable signs of degradation, rust, battery acid, etc.  If the battery seems reasonably clean, stick it to your tongue.  You will feel a slight jolt and metalli...
By: amandaghassaei

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Mon, 2 Jul 2012 18:54:37 PDT
Free 9 volt battery clip joshmt2012 I use 9 volt batteries to power a lot of my projects so its nice to have a battery clip to connect to them I get all of mine from dead 9 volt batteries and it only takes a minute to do First you start by pulling back the metal edge around the top with a pair or pliers After you have the top...
By: joshmt2012

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Wed, 27 Jun 2012 14:05:00 PDT
battery clips and how much they help mde santis1 when ever you are making something that involves batteries you noramlly would soldier the wires directly to your battery but there are battery clips that you can buy that save time and stress because if you want to replace a battery you have to desoldier it and soldier a new one with the clips it cl...
By: mde santis1

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Mon, 25 Jun 2012 15:36:11 PDT
Custom Battery Values randofo When you put two battery holders in series, they add together to make one larger voltage. For instance, if you put a 4 x AA (6V) in series with another 4 x AA (6V) battery holder, then you are left with a combined value of 12V. If you were then to put a 2 x AA (3V) battery holder in series with both...
By: randofo

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Mon, 25 Jun 2012 12:05:00 PDT
MiFi Battery Saver iSAWaUFO While carrying it around in my pocket, my MiFi 2200 was always accidentally turning on and the battery running down. This is my solution, an old rigid plastic ID or credit card, taped inside a chewing gum package. The MiFi slides snugly inside the package and along with the rigid card, forms a prote...

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Fri, 27 Apr 2012 17:00:02 PDT
Upgrade a 4.8v Dremel to 6v for more speed and power. carpespasm Where I work we often have need for a dremel tool, and the one we have at our store has always been pretty weak. Rebuilding it's battery (which is made of 4 NiMH AA cells did help some but it was still really weak when you went into anything strong. I was going to hook up a similar battery while cha...
By: carpespasm

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Sun, 15 Apr 2012 19:59:45 PDT
RC Boat Servo Battery Switch Over just smile This is my battery switch over . to change battery's when the main one is flat. 
By: just smile

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Tue, 20 Mar 2012 12:31:30 PDT
Make a battery cell holder out of 2 soda bottle caps ovestein Here Her is how I made a 1.5v battery cell easy connetet too  easily connected to wires.
By: ovestein

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Tue, 10 Jan 2012 20:16:56 PST
Very Simple LED Light freeza36 to begin, this is for beginners. I myself am one. It is very simple. It is pretty much just a red LED and 2 AAA batteries. The batteries are inside a battery case. The battery case is on the bottom of the Altoids tin (not actually an Altoids tin, but something alot like it.) The LED sticks through a...
By: freeza36

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Sun, 1 Jan 2012 16:11:01 PST
Stylish Battery Belt guyfrom7up I built this a few months ago, but I have just now gotten around to posting it.  This battery belt is my solution to battery life problems of modern technology.  If you forget to charge your smartphone the previous night, you would typically have to go the rest of the day either phone-less (simply u...
By: guyfrom7up

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Wed, 30 Nov 2011 19:25:12 PST
Battery-powered Bluetooth 2.1 Speakers! usbdevice Lithium Battery powered Bluetooth 2.1 Speakers! I need a badass portable sound system that is fully transportable and runs on batteries. I checked out original harman/kardon go+play, the bass was definitely amazing, but it consumes 8x mad D batteries and has $300 pricetag. So I look at cheaper al...
By: usbdevice

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Tue, 29 Nov 2011 22:14:22 PST
Light Up Guitar Pick Necklace(s) With Hidden Message! thealeks This is my first instructable so be nice. This was an anniversary present for my wife that I made back before were married. It is fairly simple, just a led circuit. When you put the two necklaces together so the screws touch, the pink necklace(her half) lights up. There is also a hidden message in ...
By: thealeks

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Wed, 16 Nov 2011 15:23:34 PST
SkillsUSA LED Banner jhx86 After being inspired by one of Kip Kay's how-to videos, I decided to build an LED banner for my school club SkillsUSA. I have also built another banner for Class of 2013. Materials: LED's foam core printed foam core (optional) 8 - 16 AA batteries AA battery holder picaxe PCB from radioshack 4 ligh...
By: jhx86

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Mon, 7 Nov 2011 20:35:47 PST
Solar charged 12V lead battery janisalnis Here is described how to make a solar charging station for a 12V lead battery. 8Ah capacity allows to keep alive a wireless webcam 24/7. Lead battery needs protection against overcharging and deep discharge that is realized by  two black boxes. One box switches off solar cell when the battery volt...
By: janisalnis

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Thu, 29 Sep 2011 08:39:20 PDT
0.01-131v AC to 6V DC Rectifier/Inverter Unit Paint_Man Here is a short schematic of a rectifier/inverter unit. Blue lines = Resistors
By: Paint_Man

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Wed, 14 Sep 2011 20:11:22 PDT
Unlimited USB external battery pack lamoe Smartphones are notorious energy hogs. To combat this there are several manufactures that offer aftermarket replacements of up to 3,500 mAh (3.5 amps). Online you can get 2 batteries and a wall charger for about $20 but all they’re good for is the specific phone they were purchased for. With so ma...
By: lamoe

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Fri, 29 Jul 2011 10:03:45 PDT