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- Darren Hurren@darrenhu12
Darren Hurren published a blog post Article on Pull-Up Resistors September 23, 2019 - 10:07am

Hey everyone, I found a great artice online about the importance of pull-up resistors that I thought I would share. This was useful for my project since I was using pushbuttons. I ended up using the internal 20kOhm pullups on the SparkFun...
Comments
- Andrew Slade@andrewsl
  
  Andrew Slade September 30, 2019 - 8:32am
  Hi Darren,
  This is very informative as I wanted to increase my understanding of pull-up resistors. The SIK guide was brief in its discussion on this topic. I intially thought that the pin only contained 2 states but after going through the article, it appears to be 3 states: LOW, HIGH, and floating. The floating state was a surprise as I didn't realize that the pin can go randomly between LOW and HIGH. This tells me that if I'm using a pin with a pull-up resistor, then I should clearly define the pin state.
  Thanks for posting this link,
  Andrew
- Darren Hurren@darrenhu12
Darren Hurren uploaded the file COMP 444 Final Project - Ultrasonic Distance Sensor - Darren Hurren September 23, 2019 - 9:21am

This is my final project for COMP 444. It is a Ultrasonic distance sensor with Liquid Crystal Display (LCD). Features includes: Store Hold value (red N/O push button), convert from inches to centimeters (toggle switch), Clear hold value (green N/O...
- Darren Hurren@darrenhu12
Darren Hurren published a blog post General Discussion; Haptic Feedback September 16, 2019 - 1:03pm

There are many types of feedback control mechanisms and each has its own strength and weakness (for lack of a better term) depending on your robot design or your environment. Since there always new types of sensors being developed, there are...
- Darren Hurren@darrenhu12
Darren Hurren commented on the blog Questions on COMP444 Assignments August 16, 2019 - 12:51pm

Thank you Arsh! I really apppreciate your help.
- Darren Hurren@darrenhu12
Darren Hurren published a blog post General discussion on sensors August 16, 2019 - 12:03pm

There are a multitude of sensors currently available for robotics, and in addition to that, new sensors are always in development and the ones that are already available are always being improved. Here’s a list of the most common...
- Darren Hurren@darrenhu12
Darren Hurren published a blog post Unit 4 - Food for thought (Chapters 7, 8 & 9) August 16, 2019 - 10:50am

Questions from Chapters 7, 8 & 9 of: Matarić, M. J. (2007) The Robotics Primer. Cambridge, Massachusetts: The MIT Press What’s Going On? (Chapter 7; Food for...
- Darren Hurren@darrenhu12
Darren Hurren published a blog post COMP444 Final Project Ideas August 9, 2019 - 11:44am

I was reading through the prof's Project Ideas blog and it sounds like they would be ok with me creating something using just the materials provided in the SIK, and it doesn't necessarily have to be a robot by definition!...
- Darren Hurren@darrenhu12
Darren Hurren published a blog post Unit 3 - Circuit Programming Task (Elbow Joint) August 4, 2019 - 10:01am

My task here is to build and program an elbow joint using the SparkFun Inventors Kit and the Arduino IDE. There are a number of things to figure out before jumping in to building and coding this project. First off I have to select an appropriate...
- Darren Hurren@darrenhu12
Darren Hurren uploaded the file Unit 3 - Circuit Programming Task (Elbow Joint) video August 4, 2019 - 9:50am

This video shows my Elbow joint circuit for Unit 3 in action.
- Darren Hurren@darrenhu12
Darren Hurren uploaded the file Unit 3 - Circuit Programming Task (Elbow Joint) hookup August 4, 2019 - 9:41am

This image shows how I wired up my circuit for Unit 3's Circuit / Programming task to create a working elbow joint.
- Darren Hurren@darrenhu12
Darren Hurren published a blog post Questions on COMP444 Assignments July 26, 2019 - 12:34pm

This might be ridiculously obvious, but I’m not exactly sure what to do for the assignments 1, 2 & 3 in COMP444. I’ve been completing the weblogs in the COMP444 group as I go, but I’m not sure if I have to copy all my...
Comments
- Arshdeep Sekhon@arshdeepse
  
  Arshdeep Sekhon July 26, 2019 - 1:06pm
  Hi Darren
  For assignments, you basically copy your entire weblogs(including photos and video) and create a pdf document and submit it. You would do the submission in the Moodle course page by clicking on the assignment submission link(https://scis.lms.athabascau.ca/course/view.php?id=368). I hope this helps.
  Cheers
  Arsh
- Darren Hurren@darrenhu12
  
  Darren Hurren August 16, 2019 - 12:51pm
  Thank you Arsh! I really apppreciate your help.
- Darren Hurren@darrenhu12
Darren Hurren published a blog post Unit 3 - Design Question: Robotic Arm July 10, 2019 - 8:56pm

From the comp-444-the_instructors_notebook.pdf(https://landing.athabascau.ca/pages/view/242986/comp-444-the-instructors-notebook):Design Question: How many motors, and of what type, would you require to make a fully functional robotic arm that...
- Darren Hurren@darrenhu12
Darren Hurren published a blog post Unit 3 - Food For Thought (Chapter 6) July 10, 2019 - 7:32pm

Q1: How many DOF are in the human hand? Can you control each of them independantly? A1: I wrote in a previous blog post for Unit 2 that there are 19 DOF in the human hand. In hindsight, since I don't think it's true that each one of the DOF...
- Darren Hurren@darrenhu12
Darren Hurren published a blog post Unit 2 - Food For Thought (Chapters 4 & 5) July 9, 2019 - 9:05pm

Arms, Legs, Wheels, Tracks, and What Really Drives Them (Chapter 4) Food For Thought Q1: How would you measure a motor's torque? How about it's speed? A1: I'm not exactly sure how to measure a motors torque. The easiest way would be to take a...
- Darren Hurren@darrenhu12
Darren Hurren published a blog post SIK Guide v4.0a - Project 5C: Autonomous Robot July 9, 2019 - 5:04pm

I didn't realize how fast the robot would be moving right away. I again had the motors wired backwards so that right away the robot would drive continuously backwards, even though I swear I wired it up according to the diagram in the guide. Once...
- Darren Hurren@darrenhu12
Darren Hurren published a blog post SIK Guide v4.0a - Project 5B: Remote-Controlled Robot July 9, 2019 - 4:46pm

My remote-controlled robot was not behaving the way I expected off the bat. Telling it to move forward made the robot move backwards (I assumed that the side of the robot that the wheels were attached to was the front of the robot). It was also...
- Darren Hurren@darrenhu12
Darren Hurren published a blog post SIK Guide v4.0a - Project 5A: Motor Basics July 9, 2019 - 3:54pm

This circuit is similar to Circuit #12: Spinning a Motor in SIK guide v3.3. This circuit was confusing at first. You input a number (30 to 255 OR -30 to -255) into the serial monitor then hit enter and the motor will turn forward (or backwards...
- Darren Hurren@darrenhu12
Darren Hurren published a blog post SIK Guide v4.0a - Project 4C: DIY "Who am I?" Game July 7, 2019 - 1:22pm

This seemed like it would be a pretty fun game but I don't see myself ever using this circuit again unless I made some modifications. You would definitely have to make it more challenging by using something other then animals for guessing.This was...
- Darren Hurren@darrenhu12
Darren Hurren published a blog post SIK Guide v4.0a - Project 4B: Temperature Sensor July 7, 2019 - 12:58pm

This circuit was similar to circuit #7 in the SIK guide v3.3. This was a useful circuit and very straight forward. It was fairly cold in my room at the time (the sensor was only reading 12 degrees celsius). I found out that only certain text...
- Darren Hurren@darrenhu12
Darren Hurren published a blog post SIK Guide v4.0a - Project 4A: LCD "Hello World!" July 7, 2019 - 12:51pm

This was cool seeing the LCD display in action for the first time. This project was identical to the LCD project #7 from the SIK Guide v3.3. Editing the message was as easy as changing the text inside of the quotation marks in the: lcd.print(" ");...

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