Wireless Power - Easter Bunny

By Andy (31-03-2025)

Following the investigation about wireless power in the Jack-o-Lantern project, I am able to follow online tutorials to make a power transmitter and receivers with LEDs. Tutorial such as this one by The Q. It is fun to play with wireless power but I can't resist to investigate further how it works. I suggest the following videos if you are like me wanting to know more about wireless power and how to make useful applications (e.g., educational or products).

The quest for Nikola Tesla’s wireless power technology https://www.youtube.com/watch?v=z97iOZQd-B4&ab_channel=VergeScience (Science)
Wireless Power Transfer explained https://www.youtube.com/watch?v=jpdNdU5rs24&ab_channel=DENKIOTAKU (Technology)
Wireless Charger | Theory & Homemade Circuit https://www.youtube.com/watch?v=eNZ8KPHYDvg&t=399s&ab_channel=Electronoobs (Enginneering)

Of course there are many more good videos on YouTube about wireless power and wireless power projects.

While I was sourcing electronic componets to try to make proper wireless power transmitter and receiver, I found that there are already many existing modules available on AliExpress, such as those in these searches:

Wireless power transmitter: https://www.aliexpress.com/w/wholesale-wireless-power-transmitter.html
Wireless power receiver: https://www.aliexpress.com/w/wholesale-wireless-power-receiver.html

Wireless charging phone stand

I am particularly interested in the common 5V modules as many maker projects use 5V DC. It is still good learning to make own modules but because these already existing and commercial modules are cheaper and reliable, I instead purchased a few for some quick projects. For example, attaching a 5V transmitter to a mobile phone stand could enable wireless charging of phone.

I also have some wireless power receivers such as the one in the image on the right. This receiver works will the transmitter above and in fact, it works with most (if not every) wireless charging pads for mobile phones.

This means if I place the module (the coil) on a wireless charging pad, it will be able to collect power and output steady 5V and up to 600mA current (depending on its distance from the charging pad). With some distance such as 5 mm, there will be minimal current output.

This module will not be good for phone charging, but is more than enough for projects that need to light up LEDs. Normal LEDs need only 2-3 Volt and 20mA could make them glow very bright. Using those LEDs with this module will need a current limiting resistor of 220 or 330 Ohm. However, I found that the colour changing LEDs run well with 5V and could be used directly with this module.

For knowing some common LEDs used in maker projects, please visit: to be inserted a link here

With Easter approaching, and I happened to print a Easter Bunny with the Bambulab X1C in our makerspace, I thought that I could make a glowing Easter Bunny light for this Easter. Below are four simple steps to make.

Wireless power receiver
5V - 3W - 600 mA

Solder the LED to the module. Note that the long leg to the positive, and the short leg to the negative output on the module.

2. Place the coil (face down) on a mobile phone charging pad to test. The LED sould light up and changing coulors.

3. The module is slightly wider than the hole at the bottom. I use the solder gun to open a wider gap for the module to go in.

4. Insert the LED and module board into the Bunny. The coil has a sticky tape at its back. Remove tape plastic sheet and stick to the bottom of the bunny.

Final product

Now, place the bunny on a phone charging pad, and enjoy the glowing and colour changing bunny lantern for Easter.

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