oracid

Awesome! Thank you for sharing.

Wait and see...

Thank you for sharing. I like very much the idea of the motor speed increment. I did not know you could use the PF IR remote with the light sensor to control the NXT. I presume it is the same with EV3.

I have never seen this. In variable block, you can select "tab of numbers". Unfortunately, port is not a number but a letter. Try [1;1] for Layer 1 and port A.

Thank you for links and notes. They are not expensive !

This is very good as usual ! Can you give us a link for the cam ?

What is the voltage of the EV3 output port ? In this video, I show you the answer. I was wrong ! It is always better to measure. In this page, you have all the technical links about EV3, https://education.lego.com/en-us/support/mindstorms-ev3/developer-kits

Things are not simple. I agree with you. I have tested this morning. The motor is in 8V for me, but the output voltage for servo electronic is in 5V. I would like to make a new topic and a video to show all this. I hope tomorrow.

Ok, me too, I will try to measure. So we can compare.

Thank you Jorge, you should make a topic about this Pololu Maestro USB Servo Controllers. It seems very good. Nice video. Here is the official EV3 Lego documentation, https://education.lego.com/en-us/support/mindstorms-ev3/developer-kits at the bottom of this page you can see a link to download "the EV3 Hardware Developer Kit". In this zip file, there is the file "LEGO MINDSTORMS EV3 Hardware Developer Kit". In this document, at the first page you can see this : POWER 9V battery 5 V buck boost 2 A> 3V3 1 A 1V8 1 A 1V2 1 A Power up sequence 5 V Current limiter 5V on/off Current measurement on overall current Voltage check on Batteries 5V BURN OUT and this OUTPUT 4 Output Pin 1: Motor Out PWM Pin 2: Motor Out PWM PU to pin 6 Pin 3: Ground Pin 4: 5 Volt +20 mA Pin 5: I/O (OC), Tacho, PD,PU, ADC Pin 6: I Tacho, PU from Mx1 Auto Detect Motor and Sensor This means that the output is definitely 5V. The same with the LiPo 7.4V ou with 6 AA batteries.

Hi Jorge Can you give us a link about your USB servo controller ? About EV3 voltage, did you measure it ? Myself, I have an EV3 with a 7.4v LiPo battery and don't use Alkaline AA.

Thank you. In this video I use the JX BLS-HV7146MG, I have notice it at 0'5", which is 46kg.cm torque. You can find it here : https://www.banggood.com/fr/JX-BLS-HV7146MG-46KG-180-Degrees-HV-High-Precision-Steel-Gear-Digital-Brushless-Servo-For-RC-Robot-p-1180610.html?rmmds=myorder&cur_warehouse=CN But for my quadruped project, https://www.eurobricks.com/forum/index.php?/forums/topic/168446-gato-my-quadruped-project/ I have choosed the JX B7640HV RD-360 which is a 40kg.cm torque, here :https://fr.aliexpress.com/item/JX-RD-B7640MI-360-40-KG-Double-axe-Brushless-servo-induction-Magn-tique-complet-CNC-en/32866647426.html?spm=a2g0s.9042311.0.0.40696c37ZEg6mX To compare, remember that Lego says is big servo is 4.5kg.cm with 9V and 175RPM, but it is only 5V output in EV3.

In this video, I show that you can use RC servos with the EV3 as easily as with an Arduino, thanks to the NXTServo-v3 from Mindsensors. http://www.mindsensors.com/ev3-and-nxt/25-8-channel-servo-controller-for-nxt-or-ev3

I haven't any feedback about your printer. For this printing size I have good feedbacks about CR10S (30x30x40), https://www.gearbest.com/3d-printers-3d-printer-kits/pp_796481.html?wid=1090517

Yes, I print my parts myself with a DiscoEasy200 which is a french printer. https://dagoma.fr/imprimantes-3d.html I am not very fond of 3D printing because not precise enough, even with a good printer. But I made some compatible Lego parts when unfortunately parts are missing.

Gato is my project of study for the construction of a quadruped. I have already done some quadrupeds as part of this study that you can see on this forum. To begin this new thread, I propose a test adaptation of a high power RC servo in the world Lego. Unfortunately, the Lego servos lack power for this project. To start, I chose the servo-B7640HV RD-360 JX is a continuous rotation servo. Rather than to make an adaptation box with Lego holes, I had the idea to make a "sock" rubber (NinjaFlex) that wraps the servo and is blocked by contact with the Lego beams. For the blocking to be even more efficient, I increased each internal and external dimensions of 0.5mm. So I can easily adapted to my servo mounting without any constraints. https://www.thingiverse.com/thing:3208808

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.

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

Lego motors have nothing special. You can implement them with a driver like any motor. Here is an example, but there are many others.

I will take care of this for the next video. Thank you.

@Splat Glad you like my linkages. Thank you for this new software. I will try it next time. But tell me, do you think my screen capture software is not good ?

A big thank to @Splat for recommending me its linkage software. With this software, I made 3 videos of studies for the gait of my next quadruped.The first two studies are not strictly for Lego.Nevertheless the third study was specifically devoted to the adaptivity with Lego. https://youtu.be/-FS4TKkBR8s https://youtu.be/yp_R0U7BvwY

This is very good ! Why you don't make a new topic about this ?

Thank you @Jim In this topic, https://www.eurobricks.com/forum/index.php?/forums/topic/156061-variable-geometry-tank-climber/ you can see one of my tank which use the NXTMMX multiplexer (previous version) because I needed 6 servos, as you can see. 4 servos for the tracks and 2 servos for the actuators.

Yes, it will be good idea to start a new topic. Anyway, my last picture. https://www.flickr.com/photos/146789920@N05/shares/03d99Q