Qi Wireless Charging Transmitter with 3D Printed Enclosure

For my Hexiwear university research project I’m exploring wireless charing options. I have built a DIY Qi charging station and created a 3D printed enclosure for it:

Qi Charging Transmitter

Qi Charging Transmitter

A weak point of the Hexiwear is that it needs a wire connection to charge the battery: either micro USB or with the docking station connector. That connector is fragile and subject to wear out: that connector is specified for 50 cycles (insert/removal) (see DF12(5.0)-30DP-0.5V(86) Spec Sheet) only!

Hexiwear Docking Station Connector

Hexiwear Docking Station Connector

So why not using wireless charging?

Qi Charging Standard

Qi  (pronounced “chee” means “natural energy) is an interface standard developed by the Wireless Power Consortium for inductive electrical power transfer. It is getting popular for charging mobile devices. Adafruit offers a wireless transmitter hardware (https://www.adafruit.com/product/2162):

Qi Transmitter Board

Qi Transmitter Board

The board takes 5V input (2A max) and is able to charge up to 5W. For the board and transmitter I have designed a simple 3D printed enclosure:

Qi Transmitter Enclosure Models

Qi Transmitter Enclosure Models

Below how to use it to charge an iPhone with a max charging input of 900 mA:

Charging iPhone with Qi

Charging iPhone with Qi

Some mobile devices already have a built-in charging receiver, otherwise a receiver can be added:

Qi Transmitter and Recveiver

Qi Transmitter and receiver

I plan to add a LiPo battery to the charging station to have a true mobile charger. For the Hexiwear I have ordered a Qi receiver, but it is out of stock now. So not there yet, but making progress. Until I can charge the Hexiwear, I charge my mobile phone :-).

Happy Qi-ing 🙂


4 thoughts on “Qi Wireless Charging Transmitter with 3D Printed Enclosure

  1. Pingback: DIY IKEA Wireless Qi Charging for the Hexiwear | MCU on Eclipse

  2. Hey I’m a secondary students, so I got a project where I need to create something. So my plans is i want to make charger like this.. I know there’s a lot right now..but I guess maybe my idea is different.. I don’t know if I stoled anyone idea.. BTW I just wanna ask what are the name of the prototype. I need to buy it cause i just have one week yet..hope you can help me..


  3. Pingback: DIY Stepper Motor Clock with NXP LPC845-BRK | MCU on Eclipse

What do you think?

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.