Make: Projects

Scratch-Built RC Car

Create a unique remote-controlled car with easily available parts.

Steps

Step #1: Open electric drill

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  • Remove battery pack from drill.
  • Remove screws as shown.

Step #2: Remove drill motor and speed control

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  • Split electric drill in half.
  • Remove electric drill motor and throttle switch assembly.
  • Remove drill motor from casing and throttle switch from throttle body as shown.

Step #3: Build chassis

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  • We recommend that you arrange the PVC connectors on the table to determine your chassis profile. Here was our initial step.
  • We cut pieces of PVC tubing to create the chassis frame.
  • Here is the final chassis design.

Step #4: Create suspension system

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  • Mount upper and lower swing arms to RC wheel mount as shown. Ensure movement of swing arms.
  • Test wheel on suspension arms for clearance between chassis frame and ground.
  • Use medical syringe with cap to create strut.

Step #5:

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  • Mount handle of syringe to chassis frame as shown.
  • Create recessed notch for syringe cap to interface with lower swing arm as shown.
  • Repeat for all four wheel positions.

Step #6: Throttle system

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  • Modify throttle switch by removing inner throttle button spring and replacing with lighter-duty outer spring as shown. Use a washer and pin to keep outer spring in place.
  • Next, drill a hole through the throttle button, through the throttle assembly and fish through fishing line as shown.
  • Tie ends of fishing line to servo arms as shown.

Step #7: Drive system

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  • Use RC axles to connect rear wheels together. Route the axles through a piece of PVC tubing with a hole to feed the vacuum belt through as shown. Secure PVC tubing to chassis.
  • Mount electric drill motor to chassis as shown. Create a wooden drum with a shoulder to ensure that the vacuum belt stays in place.

Step #8: Steering system

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Mount servo to chassis as shown. Create and mount steering servo connector piece as shown. Connect steering arms to the connector piece as shown.

Step #9: Radio-control system

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  • Mount receiver to chassis.
  • Mount battery pack for receiver to chassis.
  • Connect steering and throttle servo wires to receiver.

Step #10:

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Finished product!


  • jared

    hey cool mate,
    how fast does it go?

  • Rob

    Hello. I was curious as to whether you have instructions to follow based on the above RC Car that was built or perhaps another design? I usually buy the Tamiya Kits but they are a bit expensive; plus I would rather build my own from store bought materials. I have been involved with this lucrative hobby since 1985 and I am always looking for fresh ideas to come up with. Thank you very much for your time.

  • Miguel

    How do you drive it?

    • Noah

      No freaking idea :3

  • KwaQz

    you should put an outer body piece on it to make it look better

  • KwaQz

    oh and your front left and back right wheels are mixed up

  • sunayana

    i am a bigginer for this,i want more information about this built..please help

  • http://facebook chad

    please help me to built one of these car please i beg of you i want information about how to attatch thee important parts like the servo and how can i get them.

  • john

    this is great but it would be nice to get some dimensions, or some more detailed steps. your descriptions are very vague and it’s hard to tell just from pictures how everything was put together.

  • JDFiner

    Please post dimensions and a specific parts list so people who want to build don’t have to guess from pictures.

  • Noah

    Cool

  • Noah

    Btw, more specific instructions :3?

  • ajay balaji

    I am beginner i need more information about it……………..but it is nice

  • ajay balaji

    Can any one help me……….

  • elankunran

    please tell how make remote control

  • N.a.t.nirmal

    Please help me to create a Rc car

  • dewaldt

    Need better instructions like step by step stuff. And it seems like I’m not the only 1. But it doesn’t look like you ppl reply to any of the comments. If you decide to. Could you plz give better instructions

  • Teal

    Hey guys, I was trying to implement my own project similar to this.

    But I was having issue finding the wheels and the axle you are using with the servo, to rotate the front wheels. Can you help me find those online? Are those even called axles (the metal thing connected to the servo and the wheel)..

  • ROBOT

    you can find a simple way to learn and make rc car from here(http://www.instructables.com/id/REMOTE-CONTROLL-CAR-A-PIECE-OF-CAKE/)

  • Chad Hummel

    I like how none of the parts links work

  • Seth

    Having tried to make something of this sort myself, and being in the process of making a larger scale version, I’d have to say that using the mechanical speed control for a drill isn’t the best idea. Having to buy two servos instead of one so one can control the speed and the other the steering is pretty much the same price as buying a cheap ESC and a single servo, and that brushed motor ESC will likely work far better since you can do helpful things like, oh I don’t know STOP. Or even GO BACKWARDS. I tried a mono-directional ESC car and I can tell you not being able to go backwards is a huge pain. Plus, most ESCs have a BEC or Battery-Elimination-Circuit such that you hook your battery pack up to the ESC and the ESC plugs right into your receiver to both supply a safe voltage (usually 5V) to the receiver as power and, obviously, allow the receiver to communicate with the ESC. So you are actually saving a bit more money there. At my local hobby store I got a nice servo for $38 (https://www.spektrumrc.com/Products/Default.aspx?ProdID=SPMSS6020) but my 20A ESC online was under $20. (http://www.dx.com/p/320a-brushed-esc-speed-controller-w-brake-cooling-fan-for-car-boat-221133) It says 320A but that’s burst current, it’s really 20A continuous current. They also may have sent me the wrong model since the one I got looks just like the one on the product page except it has twice as many (4) motor leads and actually functions as a dual ESC with both motors responding to the same RC signal.