Schlagwort: Andy Baker

  • Remembering Andy Baker

    Remembering Andy Baker

    Reading Time: 2 minutes

    We are immensely sad to learn of the death, on 1 June, of Andy Baker, joint founder and organiser of the brilliant Cotswold Raspberry Jam. Andy had been suffering from brain cancer.

    andy baker pistuffing

    Together with co-founder Andrew Oakley, Andy worked incredibly hard to make the Cotswold Jam one of the most exciting Jams of all, with over 150 people of all ages attending its most popular events. He started working with Raspberry Pis back in 2012, and developed a seriously impressive degree of technical expertise: among his projects were a series of Pi-powered quadcopters, no less, including an autonomous drone. Many of us will forever associate Andy with a memorably fiery incident at the Raspberry Pi Big Birthday Weekend in 2016, which he handled with grace and good humour that eludes most of us:

    Raspberry Pi Party Autonomous drone demo + fire

    At the Raspberry Pi IV party and there is a great demo of an Autonomous drone which is very impressive with only using a Pi. However it caught on fire. But i believe it does actually work.

    Andy maintained his involvement with the Raspberry Pi community, and especially the Cotswold Jam, for several years while living with a brain tumour, and shared his skills and enthusiasm with hundreds of others. He was at the heart of the Raspberry Pi community. When our patron, His Royal Highness the Duke of York, kindly hosted a reception at St. James’s Palace in October 2016 to recognise the Raspberry Pi community, Andy joined us to celebrate in style:

    Cotswold Jam on Twitter

    @ben_nuttall @DougGore @PiStuffing @rjam_chat Cheers, Ben! Fab photo of Prince Andrew being ignored by @davejavupride & Andy Baker @PiStuffing who are too busy drinking… “It’s what he would have wanted…” 🙂 https://t.co/FK7sk1CoDs

    Andy suggested that, if people would like to make a donation in his name, they support his local school’s IT department, somewhere else he used to volunteer. The department isn’t able to accept online donations, but cheques in pounds sterling can be made out to “Gloucestershire County Council” and posted to a local funeral director who will collect and forward them:

    Andy Baker memorial fund
    c/o Blackwells of Cricklade
    Thames House
    Thames Lane
    Cricklade
    SN6 6BH

    We owe Andy immense gratitude for all his work to help people learn and have a great time with Raspberry Pi. We were very lucky indeed to have him as part of our community. We will miss him.

    Website: LINK

  • Autonomous drones (only slightly flammable)

    Autonomous drones (only slightly flammable)

    Reading Time: 3 minutes

    I had an email a little while ago, which opened: “I don’t know if you remember me, but…”

    As it happens, I remembered Andy Baker very well, in large part because an indoor autonomous drone demo he ran at a Raspberry Pi birthday party a couple of years ago ACTUALLY CAUGHT FIRE. Here’s a refresher.

    Raspberry Pi Party Autonomous drone demo + fire

    At the Raspberry Pi IV party and there is a great demo of an Autonomous drone which is very impressive with only using a Pi. However it caught on fire. But i believe it does actually work.

    We’ve been very careful since then to make sure that speakers are always accompanied by a fire extinguisher.

    I love stories like Andy’s. He started working with the Raspberry Pi shortly after our first release in 2012, and had absolutely no experience with drones or programming them; there’s nothing more interesting than watching someone go from a standing start to something really impressive. It’s been a couple of years since we were last in touch, but Andy mailed me last week to let me know he’s just completed his piDrone project, after years of development. I thought you’d like to hear about it too. Over to Andy!

    Building an autonomous drone from scratch

    I suffer from “terminal boredom syndrome”; I always need a challenging hobby to keep me sane. In 2012, the Raspberry Pi was launched just as my previous hobby had come to an end. After six months of playing (including a Raspberry Pi version of a BBC Micro Turtle robot I did at school 30+ years ago), I was looking for something really challenging. DIY drones were emerging, so I set out making one with a Raspberry Pi and Python, from absolute ignorance but loads of motivation.  Six years later, with only one fire (at the Raspberry Pi 4th Birthday Party, no less!), the job is done.

    Here’s smaller Zoë, larger Hermione and their remote-controller, Ivy:

    Zoë (as in “Ball”), the smallest drone, is based on a Pi ZeroW, supporting preset- and manual-flight controls. Hermione (as in “Granger”) is a Pi3 drone, supporting the above along with GPS and obstacle-avoidance.

    Penelope (as in “Pitstop”), not shown above, is a B3+ with mix of the two above.

    Development history

    It probably took four years(!) to get the drone to simply hover stably for more than a few seconds. For example, the accelerometer (IMU) tells gravity and acceleration in 3D; and from sum math(s), angles, speed and distance. But IMU output is very noisy. It drifts with temperature, and because gravity is huge compared to the propeller changes, it doesn’t take long before the calculated speed and distance values drift significantly. It took a lot of time, experimentation and guesswork to get accelerometer, gyrometer, ground-facing LiDAR and a Raspberry Pi camera to work together to get a stable hover for minutes rather than seconds. And during that experimentation, there were plenty of crashes: replacement parts were needed many many times! However, with a sixty-second stable hover finally working, adding cool features like GPS tracking, object avoidance and human control were trivial in comparison.

    GNSS waypoint tracked successfully!

    See http://blog.pistuffing.co.uk/whoohoo/

    Obstruction avoidance test 2 – PASSED!!!!!

    Details at http://pidrone.io/posts/obstruction-avoidance-test-2-passed/

    Human control (iPhone)

    See http://pidrone.io/posts/human-i-am-human/

    In passing, I’m a co-founder and assistant at the Cotswold Raspberry Jam (cotswoldjam.org). I’m hoping to take Zoë to the next event on September 15th – tickets are free – and there’s so much more learn, interact and play with beyond the piDrone.

    Finally, a few years ago, my goal became getting the piDrone exploring a maze: all but minor tweaks are now in places. Sadly, piDrone battery power for exploring a large maze currently doesn’t exist. Perhaps my next project will be designing a nuclear-fusion battery pack?  Deuterium oxide (heavy water) is surprisingly cheap, it seems…

    More resources

    If you want to learn more, there’s years of development on Andy’s blog at http://pidrone.io, and he’s made considerable documentation available at GitHub if you want to explore things further after this blog post. Thanks Andy!

    Website: LINK