[HELP] Making a Simple PF RC Car

[MarkoZorec]

Hello,

In previous post I asked for help, so I make a little research and know about PF parts in more details now...

My new question would be How to make the simplest PF-motorized RC Car? I isn't nessesery to look like car, I mean just to drive it with remote like RC car and to learn about PF creations through it...

More precisely, which parts should I buy before doing that with my kids? I think I will need:

• motor (L, M, XL, servo, just one ore more?)
  
• IR receiver (8884?)
  
• Remote (8879?)
  
• Battery box (what is the difference between AA and AAA boxes? More power? Both do with any motors?)
  

Any ideas or instructions out there?

Thanx a lot...

Marko

Edited August 16, 2016 by MarkoZorec

[syclone]

Try searching YouTube for simple cars.

The battery boxes :

They use different power sources. (AA and AAA are battery types) The AA one is used in all Technic sets

The best option is the rechargeable battery box, you won't have to worry about buying batteries and it is a lot lighter.

The best option for motors are the l-motors and a servo.

Controller: here it is better to have both, the speed remote offers 7 levels of speed for normal motors and precise steering on a servo. The normal one is just on / off

I will post some small RC chassis from Internet in a few minutes

Edited August 16, 2016 by LXF

[MarkoZorec]

Try searching YouTube for simple cars.

The battery boxes :

They use different power sources. (AA and AAA are battery types) The AA one is used in all Technic sets

The best option is the rechargeable battery box, you won't have to worry about buying batteries and it is a lot lighter.

The best option for motors are the l-motors and a servo.

Controller: here it is better to have both, the speed remote offers 7 levels of speed for normal motors and precise steering on a servo. The normal one is just on / off

I will post some small RC chassis from Internet in a few minutes

Than you... Is servo the only one for steering?

[Alasdair Ryan]

Than you... Is servo the only one for steering?

To keep it simple yes.

[syclone]

[JM1971]

I have done a couple alternates to set 9398 the skid steering robot and honda 3 wheeled bike are fairly simple. (click the pics on my sig to find LDD files)

1 or 2 XL motors, 1 servo and a AAA battery box probably offer the best all round performance and price, the AAA is smaller and lighter with the same power as the AA but has less runtime.

Avoid using bevel gears if possible, they slip.

[Nils_O]

As you want to make it as easy as possible, you will need the servo motor.

It's the one and only "simple" way to center the steering "to zero" after each steering process.

You can improvise with a "normal" motor and a clutch gear, but the centering will always be an issue.

Skid steering with wheels or tracks is an alternative for less "dynamic" vehicles, espcially for off road use.

You'll only need two motors of the same size, one for the left side and one for the right side.

The steering is a whole different experience and not very precise, but you'll be able to make a turn "on the spot" and the chassis is quite easy to build.

You'll always need a controller, a receiver and a battery box.

The rechargeble battery box has a speed controller included,

but the box isn't cheap and you'll also need a proper transformer (like 45517 or 8887) to recharge the battery.

For a skid steered model it's still my preferred solution (combined with a "simple" controller).

[Samer]

If you want to make your first nice RC car I advice you to get the 42037 (before it retires) and try to motorize it with one L (or XL but L takes less space) and one Servo motors. You will enjoy and learn a lot.

[MegaRoi]

I would recommend 8258 B model car. It is quite simple, uses no special parts (suspension, etc.), has already space for a normal BatteryBox, and has axles for propulsion and steering, plus enough space. And you can build it in almost any available color with official LEGO instructions.

Pick any motor, M is the cheapest and most available, L is still small but powerful and has good connection points, XL is quite rare for a beginner.

Servo motor for steering, less complex and space consuming, easy to attach to any model for steering.

Receiver for two different channels, steering and transmission.

Controller and a normal BatteryBox.