Comments by Jon

  • PID line follower with 5" robot chassis

    PID line follower with 5" robot chassis

    - 12 February 2019

    Hello, vinay.

    The maker of that robot, Enigmerald, links to a tutorial about PID for line following that they wrote.

    -Jon

  • PyTic - Python interface for Pololu Tic Stepper Motor Controllers

    PyTic - Python interface for Pololu Tic Stepper Motor Controllers

    - 23 November 2018

    Hello, anon.

    We changed the blog post's wording to address your concerns.

    -Jon

  • New product: Sharp GP2Y0A51SK0F Analog Distance Sensor 2-15cm

    New product: Sharp GP2Y0A51SK0F Analog Distance Sensor 2-15cm

    - 29 October 2018

    Hello, marco.

    We noticed your post on our forum and I responded to it:

    https://forum.pololu.com/t/gp2y0d815z0f-slotcar-application/15939

    Please continue the discussion there.

    -Jon

  • Building a Raspberry Pi robot with the Romi chassis

    Building a Raspberry Pi robot with the Romi chassis

    - 24 September 2018

    Hello, Gregg.

    You can just call a_star.motors(200,200); the int() function is for converting strings to integers.

    Also, we noticed that you created your own topic on our forum:

    https://forum.pololu.com/t/romi-raspberry-pi-motor-control/15704

    The forum is our preferred place for troubleshooting code, so please continue your discussion there.

    -Jon

  • Know your units

    Know your units

    - 2 August 2018

    Hello, Pedro.

    On our website and in our documentation, we try to specify torque in metric units of kg⋅mm or kg⋅cm, and it is implied that the letters kg represent kilogram-force (kgf). This is a common way to express torque; you can read more about this convention under the "Units of force and acceleration" section of this blog post.

    By the way, the weight of a mass of 1kg is 1kgf. So, there is no multiplication by 10 involved in converting between those. Factors of 10 (or 9.8) would come up if you need to convert between N and kgf or mm and cm.

    -Jon

  • Now available: VL53L1X library for Arduino

    Now available: VL53L1X library for Arduino

    - 25 June 2018

    Hello, Badri.

    I am sorry you are having trouble interfacing with your sensor. We would have to know more about your system in order to figure out why you are getting that message, but the comments section of a blog post is not a good place to begin troubleshooting. Can you create a new topic on our forum and tell us more about your setup? In particular, it would be good to know which Arduino you are using and how you are supplying power to the VL53L1X. It would also help for you to share pictures that show all of your connections and soldered joints.

    -Jon

  • New product: Pololu USB AVR Programmer v2.1

    New product: Pololu USB AVR Programmer v2.1

    - 9 May 2018

    Hello, Stephen.

    Thank you for the compliments. Yes, it possible to use this programmer to directly program AVR chips. We do not have any breadboard adapters, but you can use solid core wire or something like our premium jumper wires to make your connections.

    -Jon

  • Video: MyoWare Muscle Sensor demonstration with Maestro servo controller

    Video: MyoWare Muscle Sensor demonstration with Maestro servo controller

    - 24 April 2018

    We noticed your post on the forum and responded to it; the forum is a more appropriate place for troubleshooting. So, please continue the discussion there.

    -Jon

  • Jon's line following robot: Usain Volt 2.0

    Jon's line following robot: Usain Volt 2.0

    - 26 March 2018

    Hello.

    I do not have a wiring diagram for my robot. However, we describe the connections for our electronics on their product pages, which should make it easier to understand how to make your own connections. If you have questions about how to use any of our products, you can always email us or post to our forum.

    As for code, I do not think it is useful to upload mine seeing as how its entirely based on and not much different than our 3pi's PID line following code, which you can find inside the 3pi's user's guide.

    Also, I wrote my code in the Arduino IDE, which uses a language based on C/C++ (not Python).

    -Jon

  • New product: Logic Level Shifter, 4-Channel, Bidirectional

    New product: Logic Level Shifter, 4-Channel, Bidirectional

    - 3 August 2017

    Hello, Scott.

    Someone posted to our forum about using that level shifter with a 3.3V Teensy to control a NeoPixel ring and it worked for them. Like Jeremy mentions in that same thread, in our tests we were able to use a 3.3V signal directly with our WS2812 addressable LEDs. So, if you are using a 3.3V microcontroller, you might try connecting it directly to your NeoPixel to see if it works without any level shifting. You might also consider adding a 10kΩ pull-up resistor in parallel with the existing pull ups to Lx and Hx on each channel, which should effectively reduce the time constant by half.

    -Jon

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