Grounding Post for Desk

When there's little humidity in the air, I seem to build up a lot of static electricity in my carpeted office.  When I touch any computer peripheral, my monitor flickers, my speakers pop, etc.  

I found a old cabinet knob and designed a base to hold it.  I found an old 3-wire cable and connected the ground wire to the knob and terminated both the positive and the negative wires.

Now when I sit down at my desk, I can touch this little grounding post to dissipate the charge and safely use my peripherals (SD card reader, KVM switch, etc.)

Note: device needs to be plugged in outside the surge-protected circuit.  In other words, don't plug this into the same power strip as your computer.