Step by step guide of how to convert a wired PS/2 keyboard to wireless.

After a long overdue upgrade of my desktop PC towards the middle of 2025 I was looking at reluctantly retiring my old SteelSeries 7G. It’s a tank of a keyboard, but its PS/2 connector wasn’t supported with my new motherboard. This guide will show you how I converted this wired classic into a modern, multi-device wireless keyboard. This build will work for the SteelSeries 7G mechanical keyboard but the method outlined below should work for other wired keyboards, as long as basic checks of space inside the keyboard body are undertaken (for battery, wireless module etc…)

Build Overview:

Difficulty: Easy to Medium (requires soldering, basic multimeter, and gluing skills).

Time: 3 hours

Parts list:

Keyboard: SteelSeries 7G (or similar PS/2 mechanical keyboard).

Wireless Module: WSCome WBT-V3 DIY Kit.

Battery: 3.7V 2100mAh Li-ion battery.

Converter: PS/2 to USB adapter.

Hardware: Push switch (for toggling power button), scrap wiring, and epoxy, double-sided tape, polyimide tape (kapton tape).

Build Steps:

1. Disassemble keyboard and work out how much space there is for cable routing, battery, wireless module, LED indication light and power switch.
2. Order parts for the build.
3. Connect everything and test to make sure it works end-to-end BEFORE modifying or cutting things inside the keyboard. Make note of how everything connects.
4. Layout cable path and loosely fit all components inside the keyboard body.
5. Begin preparing and soldering all of the components together. I test as I go, so after each step of the build is completed I retest to make sure the last step was successful.
   
   My process was as follows: Connect Battery -> test -> solder keyboard cables to wireless module -> test -> solder PS/2 to USB to cabling -> test -> solder in power button and LED indication light -> test -> complete.
   
6. Fix components and cables into place, using double sided tape and polyimide (kapton) tape.
7. Test one last time.
8. Put keyboard back together and enjoy.

Wireless Module:

At the start of the build I was considering making my own wireless module, but i’m pretty time poor these days so went down the google rabbit hole to find a solution. I Ended up finding the WSCOME WBT-V3 module.

I found it surprisingly good and it worked really well with my old SteelSeries 7G. All of the multimedia keys on the 7G still function in wireless mode and the unit came with a bunch of spare cables of different length and even some solder. If you are looking to save time and probably money this module does everything you need including charging the battery.

Note: I tired the module on a custom mechanical keyboard I made a while ago using the Pok3r V2 board. Its USB but the keys were not translating very well, so pressing keys had random outcomes (i didn’t bother checking or troubleshooting, but something to note).

Note 2: LED states and what they mean.

Blue = Wireless Mode
Red = Charged
Flashing Red = Charging

Charging the 2000mAh battery through the wireless module.