Wireless Charger




About: My name is Sameer Gupta. I am a working engineer. Playing with robots, electronics, embedded system etc. is my hobby and passion. I have always loved playing with all these things since my childhood. I don't...

Here I made a low cost wireless charger for my smartphone which is very convenient in case of wireless power transmission. Not only you can charge your phone but also you can power up any other 5V devices like USB light and USB fan. Wireless means; we don't need to connect any AC supply charging adapter directly with our phone, we just need to attach a receiver part with our phone. You can see the full designing process in the video.

Step 1: Required Components

Step 2: How It Works

The working principle is based on Faraday's law of electromagnetic induction where the power is transmitted in the form of magnetic field from the transmitter coil. The induced magnetic field is collected at the receiver module side and hence further it is rectified, filtered and regulated for DC 5V.

Step 3: Arrangements

Here are some pictures of my arrangements of components and charging system. The SMPS board is energized from AC power supply and its 12V output is connected with the transmitter side. At the receiver side, an USB female pin is used for connecting the mobile charging port.



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    7 Discussions


    2 years ago

    Change the music. Too loud. Oral instructions will be good

    2 replies

    Reply 1 year ago

    Hundred percent agreed.


    Reply 2 years ago

    Thanks for suggestion.


    1 year ago

    Dang, this is smart, but I do hate instructables with loud banging music which has no connection to the video.


    2 years ago

    I prefer banggood links as Amazon stuff costs us a premium in postage here in Australia. The only thing is, does anyone know off the top of their head if this tx module is Qi compatible? Because I can get Qi for my phone, and I have a spot on my desk where I could easily make a rebate underneath and have a "hotspot" on the desk, which would be cool.


    2 years ago

    If you have a phone with built in wireless charging (or a case), then this is a cool DIY and cheaper solution but not when you have to plug something into the receiver coil.

    I really do not wish to be negative but there is no benefit here in the result you are presenting, only loss. The point of wireless charging is built in convenience. This isn't built in or convenient and it's slower and wasteful. You can do the same thing with a USB wall module, which is essentially what you are using anyway (the SMPS 12V/1A) to power the wireless charger.

    Do it because I can is great, don't get me wrong, I am a fan of that, but there is no practical benefit in this configuration, even cost savings to charging anything this way.

    Maybe grab a Qi phone or case and redo or reshow add on the project as a cheap alternative to Qi chargers on the market? That would be neat.

    1 reply

    Reply 2 years ago

    Good idea, and functional. and I do agree on the last part about the Qi chargers.

    if so, this could be a useful way to mount a hidden Qi chargers inside of late model cars, or inside of furniture.

    Also, might be functional to post the Amazon links instead of off-site links.

    Wireless Charging:


    120ac - 12v dc converter:


    All in all, it gave me an idea for my workshop...