The Doing a Raspberry! team's Pi Wars journey

 I found this to be one of easiest challenges as the attachment I used had been been made previously. We decided not to do this challenge Autonomously as it would have taken a lot more time which we didn't have because I had my GCSEs and having to do everything over zoom and email slowed everything down. However, I think doing it by remote control, whilst meaning we get fewer points, I do still think it was a very effective way of doing it. Video - https://youtu.be/GuJnDeJ1pFw (James)

One of the team's main goals for Virtual Pi Wars 2021 was to successfully get our robot line following. We managed to get the code working, although getting the robot to consistently follow the line, especially on an uneven course (as mentioned in the Feed the Fish Challenge post). We used a raspberry Pi camera and  code based on several tutorials, from  https://www.pyimagesearch.com and the algorithm presented by Brian Starkey - computer vision from scratch, presented at the piwars mini conference 2019. An encoder would have helped with this challenge as it would have allowed us to better control the robot. The code and some comments can be found on GitHub under  https://github.com/ windy54/webLineFollower . (Steve). Video -  https://youtu.be/i83fyuJIeoo (James)

I found this challenge very difficult as I wasn't sure how to get the nerf bullets in the top, because they would always either go straight over or hit the container.  I decided to try and raise my nerf gun attachment up so I could just point the gun into the top and drop the bullet in, however when I did this I hadn't read the rules well enough to realise there was a height limit. This resulted in me realising that the attachment was 170mm too high, although it did work very effectively (video of the mechanism in action - https://youtu.be/7mnbfLNHEIY)! Another problem was that it was slightly too wide. Although I did find a solution to this it didn't matter because we couldn't get the attachment below the height limit. I then tried to modify my original design to allow the nerf gun to fire straight up. However, this didn't give me enough accuracy and I couldn't find any other way to fire into the top within the rules. This meant I ended up just pushing golf bal

We created the Obstacle course on a Doing A Raspberry (our team name) and a DYI theme. We used all sorts of items that we found around our house, here is the video https://youtu.be/_G9JDnGe1sU (James)

 James has been taking pictures of his robot for his Arkwirght Scholarship Application and has now sent them to Mike for his Pi Wars talk, two of which are attached below.

 I think it was back in February 2018 when  James  turned up at Leicester Hackspace along with his mother and sister with an interest in building a robot and learning some electronics and software. That summer he successfully applied for PIWARS 2019, now we just had to build a robot. Our first entry, team RATAE, was based on hardware that James already possessed, a PI0W, Pimoroni Explorer Hat and a PI Supply Controller. So James set-to designing the chassis and I said I would help with the software. We did not realise it at the start, but we were effectively building the Tiny 4WD robot. The first chassis was built out of Mecanno . Documentation on the PI Supply website led us to “Approximate Engineering’s Python Game Controller”. This is going to be simple I thought, as the software for controlling the robot was already done, I just had to interface to my Je-Vois camera, add some line following sensors and we would be started,famous last words.   James would have no problems at home