Mod Your Trust Multimedia Keyboard

13,807

17

6

Introduction: Mod Your Trust Multimedia Keyboard

When i bought this keyboard for my media center i saw that wasn't any power button, you just put batteries inside and you are ready to use the keyboard.

Unfortunately if you don't use your keyboard for some time your battery discharge rapidly.
So i decided to insert a power switch and a LED indicator to save battery life.

What you need:

- screwdriver
- scissors
- drill
- soldering iron
- electric cable
- little electric switch
- LED (i used 3mm diameter)
- 470 ohm resistance (depending of the type of LED used)

Step 1: Removing Screws

Turn your keyboard backside, remove batteries and find all the screws.
Remove them and remember their position (the screws are not all equals)

Step 2: Open Keyboard

Use a little screwdriver or a knife and find a good place where begin lift up the cover.
Remove the cover and rotate carefully the main keyboard (pay attention at the bus connecting the keyboard to the PCB).

You are now able to see a wire connecting the positive pole to the board.

Now it's time to decide where to drill the holes for the switch and the LED. I drill over the trackball because there was enough space and it is a good position to use with your inch.



Step 3: Switch and LED Circuit

If you just want to add the switch all you need to do is bypassing the wire.
Cut it in a place where you can strip it back easily and connect the switch using 2 pieces of cable.

If you want to add also the LED you need to connect the anode at the positive cable, after the interruption made for connecting the switch, the cathode must be connected to the negative pole of batteries, but in series with the LED you have to insert a 470 ohm resistance. (look the sketch below).
I soldered the resistance directly on one leg of my LED.

Note: 470 ohm is good for a normal green LED but it is not so different if you use another color. By the way you can find information about current of your LED and change the resistance by yourself.

Step 4: Complete Your Mod

 Close the top cover carefully and put your screws back.

You have successfully modded your keyboard.

Be the First to Share

    Recommendations

    • Battery Powered Contest

      Battery Powered Contest
    • Plywood Challenge

      Plywood Challenge
    • Plastic Contest

      Plastic Contest

    6 Discussions

    0
    munchman
    munchman

    10 years ago on Introduction

     Nice, but you really should have used a smaller switch, and positioned it out the back.

    0
    laurentio86
    laurentio86

    Reply 10 years ago on Introduction

     I used that type of switch because i don't like flat switches and i havn't other at home. By the way in my opinion that position rules becouse i personally turn my keyboard on and off continuosly, not only when i start using it.

    0
    tecneeq
    tecneeq

    10 years ago on Introduction

    I wonder why the manufacturers don't just add a switch on the back. And not a standby switch, a real off switch.

    Well done mod. Well done indeed :).

    0
    roblin90
    roblin90

    Reply 10 years ago on Introduction

    Strange, as Trust did add an on/off switch in the model that I have.
    My keyboard is almost identical to laurentio's, but it has a button just below the mouse ball for said purpose.

    Still, it is odd why they would release this keyboard in the first place...

    0
    bowmaster
    bowmaster

    10 years ago on Introduction

    Cool, you should make a mod that uses internal rechargeable batteries.

    0
    kelseymh
    kelseymh

    10 years ago on Introduction

    Very nice!  Well written, with good warnings about what to watch for along the way.  Including the LED indicator is a nice touch.