Techgenie

The design you showed seems good but the batteries cannot be charged with a 5v mobile adapter because the two batteries connected in series have resultant of 7.4v 4000mah current(two such piar makes it 7.4v, 8000mAh), for this you atleast need a 9v 2A power adapter to efficiently charge all the 4 batteries in around 5 hrs. Also, there is no over-discharge protection.

Thanks #RobertS251...a conductive paint is a commercial solution and an aluminium foil is a simple home solution. I don't have any idea but i think that may be conductive paint might also cost more.

Thanks, I am glad you liked it. Although, i have disassembled a keyboard from PC, so i am unaware if this method can work. This method is not useful for laptop keyboard as the keys there use metal contacts.

Ohh yes, this is a great idea, paper will surely help to glue more reliably.

No, this solution only works for the remote. Phone buttons are much more compact and sealed differently. You can remove the keypad but there is a metal contact beneath it which cannot be removed without damaging it.

Hello #Augusto Tamayo you can do a bit of cleaning but using aluminium foil in car key remote will not work. Disassemble the key remote and see, if there are contacts similar to that of a remote then it will work but mostly, the car keys have metal contacts that can work just by cleaning the corrosive residue.

Yes, SIN1T2, it seems like a great tip to use gears and shafts but the motor from a printer has very low rpm, it takes quite a long time to wrap the coil.

Its really great #XiR_ Thanks for the wonderful tip to tight the wire. Seems like a very good build. After observing, i see that you are using TP4056 with protection module, is it allowing the wire to get red hot..?? Because when i tried, it restricted the current output to the wire and thus, the wire was not able to get hot quickly.

Thanks EarlWallaceNYC....thanks a lot..:)

Thanks Thorondor95....But if you wish, you can give your vote for my other instructables that are participating in the contests. One if them is DIY Coil winding machine - https://www.instructables.com/id/DIY-Coil-Winding-...Please, only vote, If you like the project....Thanks..

Thanks...

Thanks NeilRG...its a great tip. I will definitely get my hands on 3D printing and post some useful projects soon.

Thanks EarlWallaceNYC...I am glad you liked this project. Also, thanks for the interesting insights and important points to note.Only, if you really liked the project. Can you give me your vote for this instructables contest?

Thanks #PeteBuxton...really thanks for the vote..

Hehe...Yes, i think so, but this project is very tiny to cause any harm.

Thanks Count Volta...I am glad you liked it..)

Thanks Techno_Bot01....I am glad you liked it.

Thanks a lot ravijag...:)

Hehe....Thanks Javier AdrianU....but there was no ongoing contest when i posted this instructable.

Thanks ScottyGolden,Yes, it will work with any bottle caps..:-p..but yes, i think with a 3D printer this can be improved a lot.

Yes, it can be used with any number of cells. Only thing to consider is that they should be connected in parallel, so the input voltage if 3.7v.Also, the charging time of power bank will increase with more batteries.

I am glad you liked it....Thanks for appreciating my work..:)

I am glad you liked it..Thanks...

Great build..Yes getting the wire to tense is quite difficult but a simple method will be to use a spring from any ball pen at one of the ends. The spring will keep the wire straight.

A turn ratio of 100:1 will work for any gauge of wire. However, it all depends on power supplied. Wind about 200 turns of wire and it should work with 9v 500mA power source.

I do have a 3D printer but i am not very good in designing. Although i am slowly learning to 3D design objects. Can you suggest me some good sources from where i can learn 3D designing?

I am glad you liked it, yes this mechanism can be used as a rope if it is scaled to a bigger project with a more powerful motor.

Thanks a lot..:)

Muchas gracias..:)

Yes, you can give it a try but i don't think you would be able to wrap about 200 turns on a 10cm length but yes, you can surely overlap them.

You can now easily get the wire online from ebay or amazon. You only need know the required AWG of the wire. Here i have used 32 AWG enameled wire.

#PeteBuxton Your machine looks awesome. Thanks for appreciating my work..:)

Thanks bro..

Yes, quite a lot..

#Gadisha Thanks..

Thanks for the great tip and thanks for appreciating my work..:)

Thanks..

Thanks a lot..

I am glad you liked it..Do you have the link to the other person's work?

Thanks..:)and yes, it does feel amazing when it works..

Yes, it is completely safe to touch the coils and the ball, if the project is powered by a 9v battery, however, the transistor can get very hot, so avoid touching it.

Thanks for the tip Techno_Bot01, is 2N3055 much better than 2N2222..??

Seems like a good idea. A computer cooling fan will also work great.

Hello Thorondor95,This design is not quite practical to be operated for very long periods. However, using a heat sink with transistor can surely increase the run time but still i don't thick that it can be used a desk lamp.

Thanks..I'm glad you liked it..

Really?It is quite simple to make, however, If you plan on making this i would suggest you to use a mini quadcopter like propellers instead of any other. They help in blowing a lot more wind.

Yes, that's right but with 9v battery you don't need any clips because it already has clips over it. However, you can use the wooden case as ice cream holder.

Thanks....m glad you liked it..

Thanks bro...Your support does matter a lot..:)

Highway wildflowers from youtube audio Library

It also works great..and fulfill its purpose.

Shukriya...

Yes, any motor with voltage above 6.5v will work.

Thanks..i am glad you liked it..

Thanks...

Hehe..yeah, it seems to be fun.

Hello RahulR277,I have searched for SF-801R online but i am unable to find any receiver board by this name. Can you send me the pics of the circuit, so that i can identify the connections and help you locate them?

Yes, it is an entry in pocket sized contest because of the small size. It is not advisable to keep it inside a pocket though.

I haven't yet used LiFePo batteries for any of my projects. However, i did get some info, have a look if this can help - https://hackaday.io/project/7700-collection-of-misc-small-project/log/54262-modifying-lipo-charger-for-lifepo4

Making a spy camera from a phone camera is quite complex process.First you need to disassemble the phone and extract the camera module.Carefully open the camera module to remove the IR filter from the camera.Fit the camera module and assemble the phone.Use a circular IR LED panel available on ebay or amazon and paste it around the camera lens.Power the IR LED using the phones charger port or an external battery.Now, turn ON the IR LEDs & switch to camera app in the phone. You will be able to clearly see through the camera even in pitch black.

I am glad you liked it but i didn't quite get what you meant by analog of TP4056

It depends on the gauge and length of the nichrome wire. You can refer to the datasheet for the nichrome wire that shows the relationship graph between the temperature and current to the length and gauge of the wire. However, i used a 26 AWG nichrome wire of about 4" length and current source of about 2000mAh.

Yes, its absolutely true that if not used properly Li-ion batteries can be dangerous, that is why i have recommended to use a TP4056 charging module that will prevent the over charging and discharging of the batteries.

Its quite easy, although, i would also recommend to use a TP4056 charging module, that will protect over charging and dis-charging of the battery, making this a wonderful gadget.

Yes, it is true, but just using a TP4056 charging module in the circuit will prevent the batteries from overcharging as well as discharging. It will also make it simple to charge the lighter with just a 5v wall adapter.

Yes, it is also quite simple to make.

I am glad you liked it. However, i have not yet faced the issue of decreased magnetic force due to heat or battery voltage. Also, since nickel is one of the metals with high electrical conductivity, there is no significant loss of current as compared to conventional copper wires.