How to make a Lego tank with Arduino and RC servos

[oracid]

In this video, I show you how to make a tank with an Arduino board and 360° RC servos.

 

 

[Larry Andersen]

Very nice!  I have been using servo motors driven by an Arduino as well.  I am using 3D printed enclosures to hold the motor and a 3D printed adapter to allow attachment of an axle.   I think I'm going to try you method on my next build.  It look like it could make things more compact.

Edited October 18, 2018 by Larry Andersen

[dr_spock]

Neat. Something to do with the ultrasonic sensor I just received in the mail from China.  There are also various LEGO to servo adapters for 3D printing on Thingiverse.com.

[oracid]

Thank you all.

It is not so easy to couple RC servo to Lego. That is why I used chain at 4'25".

Thank you to give the links in Thingiverse.

[BusterHaus]

Very nice project - I like that you showed everything: building, connections and code. 

[cristi1337]

Awesome project! Have you ever thought to make an Arduino adapter and controller for the lego PF motors ? 

[oracid]

Lego motors have nothing special. You can implement them with a driver like any motor.

Here is an example, but there are many others.

 

Edited November 5, 2018 by oracid

[cristi1337]

12 hours ago, oracid said:

Lego motors have nothing special. You can implement them with a driver like any motor.

Here is an example, but there are many others.

 

Thank you for your reply, but this part I find easy, the hardest part is making an adapter so that we don't have to cut the lego connector from the motor cables :) 

[oracid]

3 hours ago, cristi1337 said:

Thank you for your reply, but this part I find easy, the hardest part is making an adapter so that we don't have to cut the lego connector from the motor cables :) 

Yes, I understand. You can find connector adapter for EV3 wire, but I have never seen for PF.

Here, https://fr.aliexpress.com/item/Dupond-Fil-Jumper-C-ble-Femelle-6-p-Connecteur-Cristal-T-te-pour-Pour-BBC-micro/32891042475.html?spm=a2g0w.search0104.3.2.7b1ad6adLZ10Wd&ws_ab_test=searchweb0_0%2Csearchweb201602_4_10065_10068_319_10892_317_5728815_10696_453_10084_454_10083_10618_10304_10307_10820_10821_537_10302_536_5730115_5733215_5733315_10843_328_10059_10884_5733115_10887_5732715_100031_5733415_321_322_10103_10913_5729115_10912_5733515_5733615%2Csearchweb201603_55%2CppcSwitch_0&algo_pvid=8a2d6047-7b68-4efc-a0a8-5c7241f4422d&algo_expid=8a2d6047-7b68-4efc-a0a8-5c7241f4422d-0

[dr_spock]

13 hours ago, cristi1337 said:

Thank you for your reply, but this part I find easy, the hardest part is making an adapter so that we don't have to cut the lego connector from the motor cables :) 

I desoldered the cable from my burnt out LEGO motors (from too much Great Ball Contraptioning), then I crimped some Dupont connectors on the ends.  It works pretty good connecting to header pins.

[oracid]

Yes, this is the best way.

One more thing, I have notice that only the two wires in the middle are used. I don't understand why there are 4 wires.

[cristi1337]

1 hour ago, oracid said:

Yes, this is the best way.

One more thing, I have notice that only the two wires in the middle are used. I don't understand why there are 4 wires.

Hello for the standard motors they only use the two, but they use all 4 for servo motors