DC Motor

Tip: Securely Wire a DC Motor

Robot Nightmares

Do you live in constant fear of your robot being stranded as it gets you Taco Bell all because it’s motor became disconnected? Or do you have to treat your robot with the care of a heart surgeon because it’s connections are weak? Well, fear no more! In this tech tip, I’ll show you how to make sturdy motor connections.



  • DC Motor
  • Wire
  • Heat Shrink
  • Zip Tie
  • Soldering Iron
  • Wire Strippers / Cutters
  • Heat Gun (Or lighter, matches, etc.)

Let's Get Down to Business


  1. Cut wire and heat shrink
  2. Solder motor leads
  3. Put on heat shrink
  4. Zip Tie wires to motor body

Pretty simple, but very useful! Stranded wire provides the best connection, but solid core will also work. Cut however much wire you need. I use about 6 inches. Do the same for your heat shrink. Two small sections of about 1/2 inch or less.

I like using red and black to differentiate my leads, but this isn’t crucial.

Solder on your wires, making sure to get good adhesion. If the motor tabs are too close to a plastic body, use something like needle-nose pliers or tweezers to act as a barrier between the soldering iron and the plastic. The tool will act like a heat sink!

Keeping the wires straight, slip the heat shrink on and get it as snug up against the motor as possible. Use your heat source to shrink the tubing. Rotate the motor so you evenly apply the heat. A heat gun is the best choice, but a lighter or matches are good alternatives.

Now, very carefully bend the wires back towards the motor so that they lie flush against it’s body. Use a zip tie to secure the motors. Get it nice and tight and your motors will last much longer! 

DC Motor
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