Wireless charging? Answered

So i would like to make a simple wireless charger for an ipod (ok ok its not so simple once you factor in the ipod) but i want it to be able to show a charging sign.... also it would be nice if it waould work from one or two feet apart minimum. I heard guys at MIT made one for a 60 watt lamp that worked 2 meters away... so its possible... i can probably order any circuitry if it is reasonably priced and available at digikey or mouser. :) I have access to several ipods so it doesnt really matter what model i use. I also know that this would probably make a huge electromagnetic wave... possibly? idk... but if it is big enough to destroy nearby electronics i might not want to try... So i am all for distance- the farther the better.... Also base power is not an issue, i can use a wall wart if i need to...i can just see an ipod touch with 500 passes of wire around it 5 feet away from a 2 foot square power station..... all while erasing my hard drive :) Soo.... im coming back to reality for a min.... anybody know any sites....any formulas too!! Thx! :) :)

Question by astroboy907   |  last reply


wireless charging coil size

So I bought one of these to play with: http://www.ebay.com/itm/130935883579 The transmitter board always gets really hot and smells faintly of something burning.  Is this normal?  Should I use some type of heat sink? Anyway, I discovered that you can add another coil of the same-ish size to the transmitter, and both coils will work.  However, if I remove the coil and add a single coil twice the size, it does not work.  I'm curious as to why.  What determines how large the coil can be? 

Topic by aliasjanedoe   |  last reply


qi wireless charging question

If I get a Qi Universal Receiver (like for a cell phone), do I still need to use a Lipo charger with it to protect the battery?  Pics attached.

Topic by aliasjanedoe   |  last reply


Wirelessly charged mouse

I need some help from all yall out there. My idea is a wirelessly charged mouse. The mouse pad acts as the transmitter coil, and the receiver is in the mouse. The concept might not be phenomenal for gamers, but would be a step into getting rid of wires on our peripherals and really making wireless charging reality. Perhaps a .2 farad super capacitor (.2 Farads ~ 400mAh) could be used to prevent the mouse from dying if you drag if off the pad for a few minutes. I'd need help conceptualizing it and for those of you who know about electronics, assisting me in designing a schematic. The design would be open source so we can have literally anybody contribute and improve the idea. Leave a reply if you want in!

Topic by JesusG33k   |  last reply


K'nex Wireless Charging Phone Dock

I had this wireless charger for my phone so I decided to incorporate it into a phone dock. I tried to make it look nice and used some creativity to get the angle I wanted for the back. The wire for the charger comes nicely out of the back of the base.

Topic by jollex   |  last reply


Wireless Electricity!

I'm playing around with the idea of wireless power. It should be easily do-able over a short distance- my plan is to be able to charge something like my cellphone through induction, by placing it on a powered surface.. But- I don't know a whole lot about induction, so I was hoping someone could help me out a bit. Here is my setup: I'm using coils from old 5 1/2" floppy drives. I used them once before in a BEAM bot pendulum.. I set one coil on top of another. So far, by pulsing 9v DC through the coil, It sparks a little (because its shorting I assume) and the multimeter in the adjacent coil gives me a small spike of voltage, but quickly returns to zero. Zapping repeatedly gives me at best 2.5v, which is totally acceptable, if only it was sustainable. I've tried using AC 9v.. but I didn't seem to work either. I also tried some different on/off cycles with a BS2.. no luck. Any info would be quite appreciated..

Topic by sam   |  last reply


Rechargable Wireless Mouse

I had this idea a while back and have yet to see one made. Unfortunately I don't have the means to try it myself. What I thought was a wireless mouse which would be recharged with its own dongle. When the dongle is plugged into the computer the batteries inside would be charged up then when it is put into the mouse for storage those batteries would charge up the mouse. I don't really know a whole lot about electronics - despite perusing instructables now and then ;) - so I don't know if this is even possible. But I don't see why it couldn't be done, or why it hasn't been done yet {unless I just haven't found it}. Peace to you and yours, Matthew "Dra'Gon" Stohler

Topic by BlueDragonFire   |  last reply


Using and charging at the same time?

Here is what i am trying to archive: 3 LED's to run off a small rechargeable battery or USB. It should also run off USB while recharging the battery.  Lake a wireless headset.  Thanks.

Topic by Squashie   |  last reply


does a solar panel interfere with a qi charger? Answered

I was wondering if a qi wireless charger could still charge if there was a solar panel in between the qi receiver and the charging pad. I was wondering for a phone. If you have a phone with the wireless charging capabilities then would making a solar case to charge it interfere with the wireless charging? I know that qi cant go through metal but is a solar panel made of metal?

Question by pucksurfer   |  last reply


Wireless charging of smartphones anywhere within a 30 foot radius, without-pad !

Just read there is a 10W transmitter IC that has been developed to power a receiver IC collecting 6W of that energy... Both are ASIC chips that can operate and power power mobile devices up to 30 feet apart. Even though the RF energy is deemed safe. I would plan on using a Faraday helmet and maybe lead under wear when next I visit a coffey house.

Topic by iceng   |  last reply


Please help with qi coils! A chance to inform my ignorance!

Hi! I am working on a small wirelessly powered project and am having considerable trouble with finding a qi coil that is small enough and also has a charging circuit. Specs:1" square at most5v at 500maferrite shieldcharging circuit just as smallMy questions:1) Can I use any prebuilt coil and swap the circuit from a larger one? I feel like there is a reason I can't!2) Recommendations of specific coils?Thank you so much!

Question by Moonman0922   |  last reply


easy recharging method for child's toy

I want to use a rechargeable battery inside a toy, and I don't want to remove the battery for charging.  I'm looking for a simple and safe method for charging that a young child can do by themself.  Here are some thoughts I've had: wireless (such as with a qi pad) = Is there any way to actually keep this from getting hot?  I'm assuming the base would be always on, and the toy would be left on it all night or longer. solar = This requires a light or the sun to charge.  I'm considering putting the solar cell in the bottom of the toy and making a light base that it could be placed on, but I'd need some type of sensor or switch so it only lights when the toy is on it. metal contact pads = This would be easier than a plug since you'd only need to set the toy down, but can it be done safely?   Anybody have suggestions?  Thanks.

Topic by aliasjanedoe   |  last reply


*HELP* PCB reworking for charge status

Hi All, My company has tasked me with finding a solution to finding the charge status on our equipment mainly headphones we use.This allows us to meet more tight time deadlines/quick turn arounds for masses of headphones,thus saving us time charging when its not always needed/necessary. The problem I have right now is the headphones allow charging & sync(programming) via usb mini b, However they act like a one way valve not allowing power to flow back out via the usb mini b.. We are looking to be able to use one of these usb volt meters to read the charge status. From my research so far I know a reading of 3.80v - 4.20v is a 'roughly' fully charged battery that will last roughly around 8 hours, Anything less than 3.30v - 3.00v will be recharged due to events usually lasting anywhere from 6-7 hours this will not be sufficient enough to keep going.I have asked my company for schematics for this pcb, However the factory is located in china & emails/questions are not always answered quickly... so any input on this would be amazing to speed this process up.I have attached photos;If anyone is able to help reverse engineer the pcb to allow this to work, your input would be massively appreciated!!(After this is sorted, I had been tasked to integrate wireless charging if possible)

Question by SamuelSDK   |  last reply


Repurposing a Sonicare wireless charger into a Galaxy S3 charger- anyone tried that?

Hi All, I have a spare Sonicare Flexcare travel charger, which is used to wirelessly charge my toothbrush. I've tried to charge a Nexus phone with it, but it didn't charge - I think this can be for two reasons - some kind of incompatibility, or the distance was too high due to the little round bulge on the charger. Does anyone have an idea if this might work? I didn't want to remove the bulge before some inputs from the forum :-) To charge a Galaxy S3 I'd need an insert to stick to the battery, but that's cheap enough. Thanks, Daniel

Topic by DanielF4   |  last reply


Ideas for powering a wireless camera

Hi, I have a 2 car lots, One has power and the other one has not, I want to run a wireless camera to the one with no power. The car lots are about 20-25 yards apart. I was thinking maybe being able to run the wireless camera off a car battery and how? and wondering how long this would last before the battery would need charging again? And would like any input on camera's to use.. Thnanks Hoey

Topic by hoey78   |  last reply


DIY plug and play(charge) controller mod?

Hey does anyone know how to make the xbox 360 wireless controller a power cable. kinda like the plug and play cable make by microsoft? plz and thx.

Topic by halosaveyer 



how can i use my wireless Xbox 360 controller on the pc with the play and charge kit?

I have an Xbox 360 wireless controller and i also have the charge and play cable for it, and i was wondering if i would be able to use this cable to connect my controller to the pc, and use it for gaming

Question by    |  last reply


why won't my xbox 360 wireless controller recharge?

I bought 2 AA lithium ion batteries for the controller and i expected that when i connected it via the usb cable that is used to charge the xbox controllers with the rechargeable battery pack that it would charge the lithium ion double A's. why doesn't it charge them? when i insert dead AA batteries and then put the charging cable on the batteries heat up because (i presume) that the cable is trying to recharge non-rechargeable batteries. so if it will recharge rechargeable battery packs and attempt to recharge non-rechargeable batteries why won't it recharge lithium ion double A's?

Question by cdubnbird   |  last reply


Using a wireless portable phone jack

I have dish network t.v. and I need a phone hooked up to the t.v. so I won't have to pay an extra charge each month. I have a wireless portable phone jack, which a person from dish network told me to buy. How do I make it work?

Question by    |  last reply


Is there a way to connect a 360 Wireless controller to a PC without the Microsoft receiver?

What I was originally thinking was to use the Play and Charge kit wire along with maybe some drivers to do so, but that proved not to work. I have a dongle for my Logitec Wireless mouse and I was wondering if there was some way to hack that or use some program to get it to receive the signals, while using the Microsoft drivers to recognize the controller. Any help is greatly appreciated

Question by Hadokendude   |  last reply


USB charging and data transfer problems

I recently got some mobile phones given to repair the USB ports. You might know the problems claimed on faulty USB problems first hand: charging takes forever, device is not always recognised in Windows, data transfers are interrupted or the device disappears suddenly and without any reason from your explorer. Although a lot of devices can suffer from from those symptoms and will work fina after paying money for a new USB port I also discovered a totally different source for the problem. In my case the cables itself. It is obvious that you should try a different USB cable before going through the lengths of replacing a USB port, but: a) not all cables are the same even if they have the same connectors! Some cables contain resistors to regulate the max charging current, others simply have flimsy and hair thin wires inside, prone to breaking. b) not all chargers are the same either! For example Apple chargers provide a voltage on the data lines that in return tells the device how fast it can charge - totally against the USB standards but Apple claims it is fine because they don't use a USB connector on the device side... Why does my device get problems with the USB? Well, to be honest, I don't know as it is not my device ;) Joking aside I will narrow it down to wear and tear. Both the connection on the phone and inside the USB connector can and will wear down over time. With daily charges for power users it is obvious that at some stage one part has to fail. Having a spare, quality replacement cable at hand often helps to find the source of the problem. In my case I had the cables for the phones but also a brand new and with 5$ quite expensive cable to spare. Guess what? None of the supplied cables worked while my new cable performed perfectly with all "broken" phones. After checking the USB ports with good light and a magnifying glass I could see dust, dirt and worn contacts. For 3 of the 5 devices a decent cleaning with methylated spirit and a small brush fixed that issue, the other two will either need a proper new cable or a port replacement. What to do if I have USB problems? 1. Check on a different PC or for the charging use a different charger. 2. Try a different, if possible new cable. 3. Check and clean the USB port. Only if the above won't help at all you should consider that the port itself might be faulty! Is there something to prevent the repair? Yes: don't use your USB port too often ;) This means, you can use a QI charger (wireless) and for the data transfer WiFi, on Android Airdroid is a really good choice. Keep your device clean! This does not mean you are a filthy pig, but more that a phone with an uncovered port tends to collect dust and dirt over time. In your hand bag, pocket or car, it does not matter time will get unwanted stuff in there. If you want to keep your device happy use a cover that also covers the USB port. I checked all the above and think I need a new port - what are my options? If in warranty go the offical way. Out of warranty a repair shop will fix it fast, but not always at reasonable costs, depending on the device and labour involved. Some devices are easy, others require the display to be removed to acces the port electronics. Online tutorials on how to dismantle your device should be available and if you are good with sensitive stuff you can do the repair yourself. Some sellers of replacement ports not only include all the tools you need (watch out for this if you don't already have them) but also videos on how to do it. I hope this little info helps people to avoid high repair costs for no good reason.

Topic by Downunder35m 


Saving energy on my wireless router

OK, so I've lagged my loft, put switches on all my chargers, installed intelligent thermostats. I've even put our cordless phone chargers on timeswitches so they charge at night (cheap leccy!). But I have a wireless router: it's always on, 24/7. I'd love to be able to put it to sleep and wake it up only when I'm using it. Notes: i) I access the web at all times of day (and sometimes night!) from the second floor; the router is on the ground floor. And I'm NOT going to go up and down two flights of stairs to switch it on/off. ii) I'm not buying a new router. It took me FOREVER to set the darn thing up the first time (yes, I know I'm a dunce, but what would you?). Any ideas?

Topic by LDW   |  last reply


does any one know if can you charge a phone or ipod with a tesla coil?

I was just woundering since a tesla coil is like a wireless energy transfer could it be used for charging a phone or ipod or kinda like puting a magnet next to your phone!! THANKS been woundering for a while!!!

Question by teslasrule   |  last reply


Wireless energy transfer and resonant coupling?

I am getting a bit sick and tired of frying expensive parts, entire coils and sitting in stinking smoke for hours, so time to gather some new ideas from you guys ;) Problem as short as possible: I am working on wireless energy transmission. Not with the usualy distances we know from charging pads or electric toothbrushes though, I am aiming for 30cm and more of distance here. After endless hours wasted on testing different coil designs I think I got that one nailed quite good but the thing is that I seem to be unable to keep resonance under load. The coils require a very tiny window for the right operating frequency in the 40kHz range or for the other design in the 150kHz region. When the frequency shifts more than 3 or 4kHz from the resonant point the efficiency drops to useless. Since this entire thing is planned to be as simple as possible so everyone can do it I would like to prevent complicated electronics. The few I need so far are done through ready to use modules. Of course a microcontroller would be the most obvious choice here but that does not fit in as I like "old school" for this one. Two ways I considered so far with more or less success: a) Fixed frequency feed and limited output power. This works actually quite well but only allows for tiny power levels like charging a mobile phone or tablet if you have some time. Problem however is that load changes affect the frequency and without a link back to the sender the efficiency goes down and not enough energy reaches the receiver for usage. b) ZVS driven coil. So far this approach gives the best output power but also uses huge amounts of juice. Good to make a fancy glass stand for your TV and supply the power through a hidden receiver in the base of the TV but since there is no limit or link between sender and receiver it is full power only. Is there a really simple way to provide a limited amount of power together with automatic resonance keping? Next one might be a bit tricky: Is there a simple way to increase the harmonic frequencies? As we know every simple oscillator also creates and reacts to the corresponding harmonic frequencies. On the sender's side I would like to be able to not just feed the primary frequency but also one of the harmonic frequencies with a similar power level. Again without a microcontroller or extensive electronics where possible.

Question by Downunder35m   |  last reply


Charging NiMh batteries using a small motor - Help!!

I want to build a battery charger that is capable of charging 12v (2x6v) of NI-Mh PCB type batteries (varta packs from farnell) . I think the batteries are button types bound together. The input will be from a small 1" diameter motor spun to give 12v out (I assume this is a dynamo). The output from the batteries needs to power : a 12v wireless reciever (6mA standby/66mA switching) a 12v - 24v dc/dc converter powering a solenoid at 25mA@24v. I have seen a 12v charge regulator in Maplins but it is designed for car batteries. If I send the 12v motor/dynamo output to the charge controller and then onto the batteries will they blow up? As I am a mechanical engineer this is new to me so can anyone help ?

Topic by bluegitty   |  last reply


I need help for a coffee table with built-in bluetooth speaker and wireless charging capabilities

Hey people, Hakan here! I'm planning to start a diy coffee table with built-in bluetooth speaker and wireless charging dock. I ll start with electronics and I want to have high quality high volume sound because I ll be using the table also a home theater system. Unfortunately I know nothing about elecronics, can anyone help?

Topic by hakantopaloglu 


how do I make a wireless power supply for my bike lights? Answered

If I created a generator for my bike (using pedal power) how can i wirelessly transfer this to bike lights or ipod charger ect...? I know induction is a way of wirelessly transmitting power and there are several instructables on this though I haven't seen a fully functional one and they're all worded in a very technical language that I don't understand.

Question by cdubnbird   |  last reply


I have a Psyclone Essentials wireless Wii sensor bar, but I lost the cable. Any cool projects for it?

I lost the cable for it, but I've already ordered a new (wired) sensor bar. This one doesn't have the option for batteries, since it charges directly from the console. Anyone have any ideas?

Topic by JJTheJetPlane5657 


Wireless or bluetooth rechargeable button attached to PC with a dongle

Hi, I am trying to find details of a cheap wireless/bluetooth largish 3 or 4 inch single button that uses a dongle connected to a Windows PC via USB.  It'll be used for push-to-talk type stuff. It should be rechargeable via USB (a mini connector, or some such thing).  While the button is held down it should send some kind of signal to the PC, and any advice on how I can detect that in C# would be appreciated.  There should also be a status light that will show green when the unit has sufficient charge, red when the button is pressed and blinking yellow when the battery is running low. Any ideas or suggestions? Thanks reaxion

Topic by reaxion   |  last reply


Repurpose Bluetooth Chip from Wireless Headphones?

I've got a pair of Bluetooth headphones that I'm pretty sure is about to kick the bucket; they don't hold a charge properly and they seems to be falling apart.  Kinda what I get for being cheap I guess. I don't feel like spending money on getting a new LiPo battery to attempt to fix anything (especially considering shipping, etc. repairs will probably cost more than the headphones themselves), and so I was wondering if I could take out the Bluetooth chip inside and repurpose it for some other project with an Arduino or Raspberry Pi, probably for transmitting data from a sensor. A side note, if there are any ways I can refurbish the headphones themselves in a way that's worth the time, money, and effort, I'd like to hear about that, as well. Thank you!

Question by DoctorN1   |  last reply


Power AND Data Transfer Using Inductive Coupling aka Wireless Power?

I'm sure that many people are familiar with Wireless Power. https://www.instructables.com/id/Wireless-Power-Transmission-Over-Short-Distances-U/ Especially with ALL the new products out in stores that power your iPod and Cell Phones without wires! Through the air, these products raise your dead battery from the grave, and return them to full power through the air! Obviously this is an amazing feat of physics. My instructable on Wireless Power has gotten a lot of people exited about the "no-wires" future that we can enjoy. I've been working on this project for a long time, and I feel that inductive coupling has so much more potential. One day I thought of the possibilities. I though wouldn't it be awesome if I could sync my iPod wirelessly while charging it wirelessly. Here's my question: Transferring data using inductive coupling? Good idea? My goal is to make an instructable on data transfer with inductive coupling. I'm looking for motivation, so if you're interested in this please post a comment. I think it would be awesome if Powermat, or some other company would make data transfer possible. So, wire free data transfer w/ inductive coupling, good idea? THANKS

Question by robotkid249   |  last reply


How do you connect a wireless headset phone cord to standard stereo/mic jacks?

I need to know how to make a wireless headset function as a wired headset.  At the base of the charging station is a standard phone jack.  I need this phone cord split to where it will plug into the pink/green, audio/mic parts of a modified speaker phone.  There is already an existing cord where this was done, but the person who did it is no longer available.  In addition, they didn't put it on the 2 separate jacks, just one large audio jack.

Question by austinatc 


Help with a wireless fireworks igniter and other functions withing it Answered

Hello Everyone, My name is Glenn and I'm new here. Last year I built a 10 cue fireworks igniter. It was really simple and straight forward. This year I disassembled it and am trying to build a wireless RF igniter. Question 1: I want to make it a 48 channel igniter but all I can find is 15 channel boards, does anyone know how I can overcome this issue? Question 2: I'm using a 12V DC lead acid rechargeable battery and would like to add an internal battery charger with a red charging light and a green charge complete light. I'm definitely electronically challenged so I have no idea how to accomplish this, can someone help? And finally, Question 3: I would like to also add in internal continuity tester but once again, I have no idea how to do it without setting off the firework it's attached to. If someone could help me I'd certainly appreciate it, thanks for reading and I hope everyone has a blessed day. -Glenn?

Question by Music_Man608   |  last reply


SOLAR POWERED IP CAMERA RUN ON 3G MODEM

Hi everyone, im a new member and have a task at hand which is a puzzle to me but would probably be a breeze for u tech savvy bunch :-) Ok heres my dilemma: I have a remote location where i want to setup an IP Camera run on Solar Power. I have purchased a wireless 802.11 ip camera with pan and tilt capabilities as well as an audio in (internal mic) and an audio out (1 x audio line out interface) along with 4 alarm in and out male ports. Heres what i want to be able to do: 1. View the cam remotely via PC/Mobile Phone. 2. Utilise the Pan and Tilt capabilities 3. Have a text message/email sent to me everytime the alarm is activated/motion is detected 4. Be able to have audio in and out 5. Have the camera on standby until motion is detected 6. Have the solar power as the only source of energy for the camera and the camera to be able to run 24hrs a day (standby and in use) 7. Was also wanting the solar power to charge batteries so at night time the cam would still work or if its a cloudy day etc etc Now im thinking that i would need a modem with a sim card in it to work the internet side of things. But how would i go about getting the audio and alarm functions working? I can plug an ethernet cable into a modem and put a sim card into a modem and connect the cam and modem up to a solar power source, but where the heck do i plug the audio and alarm cables into??? In the below link theres specs on the cam as well as pics of the types of connections available on the cam. I wouldnt have a clue about Volts and Watts and amps etc so am stuck at just buying the cam which is here: http://www.aliexpress.com/fm-store/107302/211328538-491571938/Promotion-free-shipping-cctv-wirless-ip-camera-wifi-802-11-b-g-9-language-m-jpeg.html Please help ladies and gents it would be kindly appreciated. Thanking you in advance for your words of wisdom.  p.s. i have scoured the forums and google for this type of setup and have got close but need something custom for my situation and my low level of knowledge in these areas.    

Topic by dom791114   |  last reply


Is it possible to step up the voltage of square wave ac coming out of a function generator from 5ppv around 10ppv? Answered

I'm trying to use a square wave function generator for the purposes of inductively charging a cell phone. Also, would magnetic shielding be necessary for this application or is the magnetic field weak enough to not interfere with the phone?

Question by phillystealth   |  last reply


So I'm thinking of entering the 'Dead Computer'contest, but I can't think of anything!? Answered

So I'm thinking of entering the 'Dead Computer'contest, but I can't think of anything!? I have quite alot of old computer stuff around my house, some of this stuff includes: An old wireless phone The old wireless phone 'hub'? A few disposable cameras An old video player 2 computer screens A tv remote DVD player Computer speakers A wireless mouse with charging stand Old headphones (The big ones that go over your ears) So, any ideas on what I could make with any of this stuff? Thanks! '

Question by Hiyadudez   |  last reply


How do I wire a 5v regulator?

I am just hooking up a wireless weather station and it uses 4 AA batteries to power it. (it's a 3v supply to the unit) I want to use a solar panel I have to power it. It's a very small solar panel with a 15-16v output and really low current so that is not an issue. Anyways, I want to use a 5v regulator to charge rechargeable batteries in the transmitter, but I've seen capacitors used in the wiring and what is that about? Also, it's 3 pins, and the middle is ground, but how do you wire it and do you even need it? Thanks

Question by tinstructable   |  last reply


How do I send and receive data on an arduino via wifi using a router with Open-WRT?

My friends and I are building a remote controlled turret (call it cliche, I think it's awesome). They have charged me with the programming and design of the motor chassis. I read the MAKE: article on a Roomba that was controlled via a serial out on an Open-WRT router. However, with the turret, I would find it much more easier to use an Arduino interface. Is there any easy way to communicate between a router running Open-WRT and an Arduino? Thank you for any help.

Question by spel3o   |  last reply


Can I switch off a smartphonecharger with bluetooth / arduino?

Hi Everybody! After doing nights of searching on instructables.com an Google, I decided to ask my question here. What do I have in mind?  I purchased a Qi wireless cellphone charger and receiver for my phone. The charger I would like to connect to an Arduino (or similar) with bluetooth module, so that when my phone reaches 100% charging the power will be cut off. As soon as the battery's charge drops below 20%, I would like to start teh charging again.  Is this possible through Android/Bluetooth/Arduino? Thaks for sharing your thoughts on this!!!

Topic by mooviobot   |  last reply


Hub motorized 4 wheel drive wireless electric skateboard kit  

Landwheel drive is the newest drive system for skateboards that can be mounted under any deck. Just unscrew your rear truck and replace it with the landwheel Drive .    Specification of Landwheel Skateboard Drive:   Model Landwheel Drive( Dual Brushless in-wheel motors) Distance 20km Power 2 X 1100W Max load: 120kg Max Grade 20% Waterproof Water and dust proof (IP65) Frame Material Aluminum alloy + ABS Battery Li-Poly batteries Range 12-15km Weight 3.2kg (Include Battery) Size: 313 x 174 x 41 mm Certificate CE, FCC, RoHs, MSDS, UN38.3     Details of electric skateboard drive : 1. The Motors Two in-wheel motors Power 2* 1100w  Topspeed  35km/h Maximum Grade 20% Water and dust proof (IP65) Freewheeling when you push Exchangeable wheels 2.The Frame Solid magnesium single frame Click-in mechanism for the battery   3. The Battery Pack Range 12-15km Charge 2-4hours Weight 700g        Energy 94.08Wh    Capacity 3200mah Swappable via click-in mechanism Certified for airtravel Water and dust proof (IP54)   4. The Remote One button device Switch between 2 riding modes LED displaying state of charge Rubber coated for better grip Safety wrist strap

Topic by Hollie hua 


BLE Beacon finder, how to ?

Hi everyone,I am mechanical engineering student and haven't expertise in difficult circuits, so I am here to ask for your helps guys!I am working on a personal project in which i want to create the smallest BLE Bluetooth device possible which could be charged by induction. What i want is just to connect this device to my smartphone.I did some research and i came up with the following components : Qunqi-HM-11-Bluetooth BLE (1.7 V to 3.6 V) Rechargeable Lithium Battery (3V or 3.7 V ) TP4056 Lithium Battery Charger (5V, With micro USB) Wireless Charging Module 5V/300mA (SKU:DFR0363 Brand:DFRobot)So my questions are : Is the TP4056 required to charge with the wirless charging module ? Are those compnents can work together ? Is it possible to make all those components in one PCB by designing it ?Thank you very much,Nabil

Question by dzproject24 


Please could anyone Confirm what i intend to do is Correct ???

Hello again ! Ok well, after another week of major research, i have a theoretical concept for my battery packs that i intend to create but would very-much-so appreciate it if anyone could confirm that what im about to do is correct in the sense that it will serve my purposes! Scenario: I Have a pinhole wireless Camera & Receiver, the camera will be attached to an RC 1/10th Scale Buggy and the receiver will be near me, in a bag, on the floor... Instructions that came with the gear states: The Camera should receive 8 volts DC and will consume up to 200mA per hour... The Receiver should receive 12 volts DC and will consume up to 500mA per Hour... (Yet the receiver runs off a 9v battery!) As i am still waiting for some battery holders & a few other components to arrive i have put together the following for prototyping, please could anyone confirm that this would  work as i intend it to ? : Li-ion Pack (For Wireless Camera): 14.4v { Four x 3.6v Cells } Connected in series Charging Start @ 13.2v Charging Finish @ 16.8v To Emit 8 Volts, 1A Max: i will Use an ''LM2940T'' Semiconductor i will want to Either BUILD (preferably) a charger OR Buy this CHARGER... -------------------------------------------------------------------------------------------------------------------------------------- Normal Battery Pack for Wireless Receiver: 24v { 16 x 1.2v Cells } -Individually charged- + FOUR x 4-AA Battery Holders (In Series) To Emit 12 Volts, 0.5mA Max: i will Use an '' L78M12CV'' Semiconductor -------------------------------------------------------------------------------------------------------------------------------------- The usage i currently get from a humble 9v battery connected to the camera and receiver (two 9v batteries in total) is WORSE than abysmal and i only get upto 15mins of decent record-time from the wireless gear so i will be making the two battery-packs above to get a much-longer run-time.... Questions: 1. Will my power-packs work as i intend to use them ? 2. When i go to build the Li-ion battery-pack i really want to include some circuitry for Deep-Discharge Prevention & Over-Charge Protection, could anyone please point me in the right direction for a schematic please ??? A MAJOR thank-You to all that have helped me in the past & A-MAJOR Thank-You in advance for everyone's help again!

Topic by offtherails2010 


Don't you hate it when.....

...you make something and forget to document it because you're so engrossed. I made a night light for my daughter. It is inside a coffee jar usually but for getting a good picture of the tree I took it out. It has a tilt switch for on and off. Upside down is off. It's also got.... A lithium battery Wireless charging Magnet wire construction I'm posting this because I don't know if I'll make another.

Topic by xn1ch1   |  last reply


(newsletter) Wireless Power, Bike-Powered USB Charger, 6 Cent Throwie...

Sign-up for this newsletter: Welcome back! Get the LED Out! Contest - New contest! Enter any Instructable that involves LEDs and win some amazing lights from Monkeylectric! Mother's Day Contest - Closes for entries on Sunday! Make something special for Mom and win a sewing machine from Singer! Vote for the entries in the Earthjustice United States of Efficiency Contest to help decide who will win a MacBook Pro! Vote now!Help the Robot travel in our Cutout Contest. Post your photos and get a patch!Become a fan of Instructables on Facebook and get updates from the Robot. Laptop Bubble Stand Charge any USB Device with Your Bike Build a Woodworker's Workbench Pie in a Jar Make it glow, and win Monkeylectric lights! Closes for entries this Sunday! Wireless Power Web Based Water Metering 3D Anamorphic Street Art The LED Lightbulb Felt eeePC / netbook Pouch for $8 3D-Printed Combination Lock Make a Diamond Engagement Ring Make a Solar iPod/iPhone Charger Get outside! Vote for your favorites! No-Sew Duct Tape Zipper Pouch Portable 12V 17 Watt Wind Generator 6 Cent LED Throwie Urban Prospecting Detector Sign-up for this newsletter:

Topic by fungus amungus 


Building: wireless monitor/tablet recycling old laptop parts

Please be positive and constructive with your questions and comments.Building wireless touchscreen ar1100 to bluetooth transmitte by Fearlessleader on Tue Mar 20, 2018 5:04 am Hi I have 15.4 samsung laptop screen I am converting to 4 wire touch overlay and want to us the ar1100 but need to go from the usb out bluetooth wireless mouse transmitter. I would need the same type of transmitter like any bluetooth mouse would have inside. The mini pc I am building has both bluetooth and wireless display.Parts list so far15.4 samsung screen pulled from a Dell laptop modle LTN154W1-L01Control board for the screen with hdmi ebay 30$ link https://www.ebay.com/itm/HDMI-DVI-VGA-LCD-Lvds-Con.. 12v 3 amp power supply for the screen controler I already have but later I would build voltage control unit that would charge or power the whole unit. Again YouTube has videos and links for the part for this. And I really don't want to have a bunch a supplies to run it. While prototype it I will the final will run from the laptop I got the screen from. It should plenty of power for a single board computer like the new pi 3 to be added and the audio amp15.4 4 wire overlay conversion many sorce's about 50$ link https://www.ebay.com/itm/15-4inch-4-Wire-Film-to-F... $Ar1100 touch to usb mouse adafuit 10$ link https://www.adafruit.com/product/1580Hdmi wireless receiver. 20 to 40$ depending on features like if it has chromecasting and such I just need video so I think the 20$ unit will do nice. These can be found in many places, so I would think this to be open end item depending on features the builder wants. I would buy the best you can afford to leave it fexible .The last thing I need to make work would be usb transmitter to make the ar1100 bluetooth or matched pair of 2.4 dongles usb this is the only item missing. I could test the whole set up but would have run 1 usb cable, but that's a deal breaker for full wireless... If I had a old bluetooth mouse and knew how take its transmitter out, that work but a bluetooth usb adapter the would plug in the ar1100 board would be the thing I need.If someone would know how to remove the mouse transmitter and wire it to male usb plug I would be happy to buy it. I real want this to made from as much recycled parts as possible.I just don't want to have run a usb cable from ar1100 to the pc.I don't think the same usb dongle that's used to the pc is the same as the one used in every bluetooth mouse or keyboard. That's my idea for a wireless touchscreen handheld All the parts are easy to get I just need make the ar1100 usb board and wireless usb transmitter. The pc would use GA-h77n-wifi mini itx as it has both bluetooth & wireless display and wifi.Part 2The idea sound lol! I want to build a frame for the screen with speakers and laptop battery and used the power supply from the Dell laptop I got the screen from, that would need a small amp. Since the receiver is hdmi, I would think the audio would be there if not that would be simple to just use a bluetooth stereo headphones and run the earphone wires to the small audio amp.I would like any comments on this idea and a sorce the one part that missing the usb mouse transmitter for the ar1100 and this could be built.So What do you folks think? A portable monitor 100% wireless that could even double as touchscreen remote! I even thought down the road to add the new pi 3 to it as that would completely independent as low power tablet or connect to the pc that nvidia gpu and could stream pc games to My Nvidia shield too. With all the power of I7 2700k oc to 4.2ghz.The possibilities here are endless you and all kinds a features adding a mic and Webcam for video calls with sckype or google voice and messenger and bingo u have a voice and video over IPThis do able you think?All comments good or bad give to me straight.Oh but go easy on the grammar thing. I technology geek but a 56 year old high school drop out. But hay at 37 I was disabled with fractured spine by time I was 40 I did all computers repairs for my local high school and was building white box computers out of my home office. If there is 1 thing I have learned in this life anything is possible but you have to try!Please be positive and constructive with your questions and comments.

Topic by Fearlessleader62   |  last reply


match potential emergency energy sources w/ critical equipment

Trying to match potential emergency energy sources (solar, inverters, auto/marine batteries, wind turbines) with particular devices necessary for emergency response planning (laptops, flashlights, refrigerators, handheld radio units, other RF gear, wireless/wired networks) 1. Trying to calculate how much energy and in what form we'd need to, for instance, reliably keep a laptop running during power failure. 2. With respect to devices that need DC power - such as walkie-talkies - which are usually recharged (at least in North America) from AC power, through a DC converter, and then charged:: is it possible with devices which generate DC power - such as solar PV generators - to charge them directly without converting to AC and back to DC? We're looking not so much for particular matches between power source X and device Y - more methods for making the calculations.

Question by jsoroko   |  last reply


request, 12vcd (automotive) to 12 vac power supply

Why?  So I can run a pile of 'pro' audio equipment on a parade float without resorting to a generator or an off the shelf 120vac (barely) inverter. The equipment I'm talking about is a pair of 4 channel wireless mike receivers (8 mikes total) and a 10 channel mixer.  Other input comes from an MP3 player or CD player.  We also have an AM/FM/HD radio on board for those long waits in parade linup.  The power amp is an automotive (12vdc) unit, 4 x 1000 watts.  Main power is a pair of deep-cycle NAPA (optima clone) spiral cell batteries topped-off from the tow vehicle via a charge isolator.  There is also an 35watt solar panel (again, for those long lineups) run through the charge isolator.  The solar panel maintains the batteries while the float is parked or in storage. Cracking open the gear we have, every single one of them uses a 10:1 step down transformer to drop 120 vac line to 12vac before dumping it into the mainboard. It looks like 12vac @ 3 amps will do it for the wireless mike receivers and mixer, but why not shoot for 5 amps to be safe? Ideally, there would be some serious filtering and regulation/protection on the output. In a Perfect & Ideal world, there would be multiple 12vac outputs each capable of 2 or 3 amps and isolated from each other. Too much for a request?  You never know if you don't ask. And, in advance, many thanks!  

Topic by snoeclipse   |  last reply


request, 12v dc-12v ac power supply

Why?  So I can run a pile of 'pro' audio equipment on of a parade float without resorting to a generator or an off the shelf 120vac (barely) inverter. The equipment I'm talking about is a pair of 4 channel wireless mike receivers (8 mikes total) and a 10 channel mixer.  Other input comes from an MP3 player or CD player.  We also have an AM/FM/HD radio on board for those long waits in parade linup.  The power amp is an automotive (12vdc) unit, 4 x 1000 watts.  Main power is a pair of deep-cycle NAPA (optima clone) spiral cell batteries topped-off from the tow vehicle via a charge isolator.  There is also an 35watt solar panel (again, for those long lineups) run through the charge isolator.  The solar panel maintains the batteries while the float is parked or in storage. Cracking open the gear we have, every single one of them uses a 10:1 step down transformer to drop 120 vac line to 12vac before dumping it into the mainboard. It looks like 12vac @ 3 amps will do it for the wireless mike receivers and mixer, but why not shoot for 5 amps to be safe? Ideally, there would be some serious filtering and regulation/protection on the output. In a Perfect & Ideal world, there would be multiple 12vac outputs each capable of 2 or 3 amps and isolated from each other. Too much for a request?  You never know if you don't ask. And, in advance, many thanks! 

Topic by snoeclipse   |  last reply


Bluetooth pc game controller

Hi guys! I'm building a dtm series racing steering (replica) and i have 11 push buttons plus 1 rotary encoder with push so 14 inputs in total. I'm able to make it work with an Arduino pro micro but i want to make it wireless! Bluetooth is in my mind for this project. I was looking for the bluefruit ez-key but it's discontinued so the feather line are probably the way to go Now but there's more than one models that are bluetooth and i want to choose the right one for my project! If someone can recommend me one ore even other brand. I'll need all the stuff like lipo battery, charging board .. thanks!

Topic by AlexS229