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About oracid

  • Birthday 08/01/1953

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  1. oracid

    [EV3] Climber Robot

    Yes, you can !
  2. oracid

    [EV3] Climber Robot

    The french touch ? I presume.
  3. Awesome! Thank you for sharing.
  4. oracid

    [EV3] Climber Robot

    Wait and see...
  5. 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.
  6. 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.
  7. Thank you for links and notes. They are not expensive !
  8. This is very good as usual ! Can you give us a link for the cam ?
  9. 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
  10. 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.
  11. Ok, me too, I will try to measure. So we can compare.
  12. 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.
  13. 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.
  14. 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.
  15. 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