Make Wireless Charging Mouse

I prefer wired mouse to wireless mouse for one reason, which is about battery. It feels inconvenient for me to look for the charging machine to charge up a dead battery or purchase new battery when it is discharged. Sometimes it goes bad at inconvenient times.

I found wireless mouse not used for sometime in my room and decided to make an wireless charging mouse for myself.

First, you can purchase the inductive charging set online(follow this link). With this module, you can upgrade your wireless mouse into your own wireless charging mouse.

When it comes to the wireless mouse with 3V (uses two 1.5V batteries), the inductive charging receiver makes 5V DC output and it flows into LiPo charger module. LiPo charger module charges LiPo battery and prevent over-charging (and over-discharging). Also we can draw power from LiPo charger module to activate the mouse.

the components and tools for this job:

• wireless mouse
• inductive charging set (input 5~12V, output 5V)
• LiPo charging module
• LiPo battery
• power source(5~12V)
• soldering iron and accessories
• screw-driver
• etc

In the photo above, you can also find major parts that you need to prepare.

You can see the circuit like picture above when you open mouse cover. Remove the AAA battery space and we’re going to locate parts in it. The red and black line is for the power source.

I used LiPo charger module below. It has connection holes for battery, power input and power output (for mouse in this project).

• +, – holes in left side is for the external power source(5V). Connect both to inductive charging receiver.
• B+, B- holes in right side is for the LiPo battery's +, -.
• OUT+, OUT- holes in right side is for the mouse. The red and black lines in your mouse should be connected to each of these.

I’ve soldered parts like picture below. To turn it on/off, I added a button at LiPo battery power line.

And I tested if wireless charging parts works well or not. Above picture is inductive charging transmitter. I connected this to power supply with 12V setting.

When transmitter and receiver’s coils are getting close, LiPo charger module turns red LED on. You can see the blue LED when battery is full.

At this time I found that this white mouse is out of order. So I changed the mouse with another one. At below steps you can see the black one.

I made space for the wireless charging parts by removing the AAA battery area. To be more effective in wireless charging, locate the receiver’s coil at bottom.

And check again if wireless charging is working. If there is no problem close the cover.

Hide inductive charging transmitter under the mouse pad or anything else.

Now you are free from battery!!

This article is written with wireless charging mouse. :)

See also:

• Original document, translated in Korean.
• Inductive charging set
  
• Wireless charging module couple
  
• Details about low power charging