Knex Motor Modification

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Introduction: Knex Motor Modification

About: You can find me over on Knexflux! https://knexflux.net

Are you having the red battery motor of knex and are tired of changing batteries all the time? This is the solution! With this you modify the motors to ones to be plugged in!

Step 1: Gather Materials


First gather the materials.

Step 2: Prepare the Cable


First you preper the cable.

Step 3: Unscrew the Motor


Now you unscrew the motor. You just need that red half.

Step 4: Prepare the Red Lead

Veary simple, just screwing a hole.

Step 5: Using the Soldering Gun

Soldering gun

Step 6: Putting It Together

After you made this step you'll have to put 3Volt on the other end of the cable. Polarity is irrelevant because it still goes through the switch.

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    28 Discussions

    I really want to do this now

    I don't know what you mean with the first half but as long as you don't put enery through the new wires you put there you can still run it via batteries. I don't know if it is a good idea to run it at the same time via power plug AND batteries...
    You must know that you are just adding a new function to your motor when making this.

    Woah that's about 4.5 Watts of pure electricity going through one motor.
    Better if you use smaller ones because the one you're using is very powerful it could burn a motor in minutes, mine is about 150Ma and it smelled bad after minutes of testing.

    oh, sorry, it doesn't say the exact amount at 3Volt, you can tune it up to 12 V and THEN you have 1.5 Amper. :)

    Nice! But I'll probably stick with the plug-in motors Knex makes, because I don't have a soldering iron.

    1 reply

    Oh, I see. Mabe It'll also work whey you twist the cable around that place you'll have to solder, but i think not so good.