Maker Faire 2011 – belated post

Here’s a selection of photos from last years Maker Faire.I got sick right after the event and forgot I hadn’t upload my photos.

Only 7 more days till Maker Faire 2012 !!

We had an awesome turn out last year, with over ten builders in attendance at some point over the weekend. Don Bies and Grant Imahara joined us for a group photo.


R2 has become so popular at the faire, that they now provide their own droids for people to take photos with


As always lots of children at the faire, some more adventurous than others



Artoo loves to see Star Wars tee’s


Mark demonstrated his awesome 2-3-2 droid


And Artoo always appreciate the hard work from the Make team who put on the faire


Johnathan, our droid security guard, was there again


And there was a ton of Android/Arduino robot mashups


This young girl stopped by to say thank you to Artoo for being there, she gave him a personalized note



The family later emailed to tell me Artoo inspired them to make their own droids




Posted by Chris on May 11th, 2012 in Events | Comments Off on Maker Faire 2011 – belated post

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Kinect Star Wars Midnight Launch Party

I took Artoo out for the Star Wars XBox launch party the other evening. Plenty of fun and games, including free raffle drawings, a costume contents and a Star Wars Trivia competition.


Line was pretty long and the 501st was on hand to keep everyone in check, by the time everyone was inside the store was packed.

Most of the children (young and and old) where excited to see Artoo. This little girl almost fell over when she saw him coming


But some were a little more timid









As usual more photos in the gallery.

Posted by Chris on April 5th, 2012 in Events | 1 Comment


Maker Faire Interview with Steve Simmons

Make:TV interview with Steve from last years Maker Faire.


Posted by Chris on January 12th, 2012 in Events | Comments Off on Maker Faire Interview with Steve Simmons

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Halloween 2011

Halloween has been and gone and as usually Artoo was out to share the night. We mixed it up a bit this year and setup a movie projector to show The Star Wars on a big screen.


I also setup Vader and Yoda in the windows.



We had a big turnout and everyone was very well behaved. Had our far share of SW costumes, but not as many as usual. I would say Mario and his brother was the top choice this year, closely followed by Transformers.








As usual more photos in the gallery.

Posted by Chris on November 1st, 2011 in Events | 3 Comments


Maker Faire Interview

We’ll be at Maker Faire again this year, and running up to the event they’re featuring makers on their blog. Check out my  interview here.

Maker Faire is May 21st and 22nd, at the San Mateo Fairegrounds. We should have a good showing again from local builders as well as a few friends from further afield. I can’t wait.


Posted by Chris on May 4th, 2011 in Events | Comments Off on Maker Faire Interview

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VaderBot @ RoboGames


Posted by Chris on April 24th, 2011 in Events | Comments Off on VaderBot @ RoboGames

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RoboGames 2011

RoboGames was a huge success, and I had a blast driving Artoo around with my new controller. I lost count how many people thought he was autonomous. I could stand 5 steps away and nobody would bug me or even notice I was there. I could mingle in and out of the crowd, walk past Artoo – zero response. A lot of people would ask around who was controlling him, and I would respond “If you find out let me know”.

One downside is that I had my hands in my pockets the entire day, so didn’t take many photos. Big thanks to Jonathan and Matt who took most of these photos.

As usual, Artoo was a big hit with everyone, especially the kids
But I’m also pleasantly surprised the attention Artoo gets from the adult competitors. Here we are in the pit area

On Saturday I hadn’t thought ahead, and hiding the controller in my coat pocket wasn’t such a great idea. It was a hot day and I quickly overheated and paid the price at the end of the day. On Sunday, I remembered to bring my fanny pack to hide the controller in.

Here I am again, standing to the left of Artoo chatting to someone, with most people oblivious that I was really controlling the droid.

On Sunday, I was joined by Matt, his son Max and their droid. I really wanted to hang out with them more, but the only catch was people then assumed that he was driving both Artoo 🙂

Unfortunately, I don’t have any photos of us together, but did find this shot on flickr of our droids and Matt in the background. It’s probably my favorite photo from the weekend.
Original photo by human fiction.

There was a few Star Wars things at the show. Of course there were children in SW Ts

And R2-Heineken made an appearance


And a mini-Darth Vader robot that had trouble standing and keeping his head on

Bonnie Burton from Lucasfilm covered the event live on Twitter, and she also took some great photos.

Onto some of the more technical aspects of the weekend, including problems and lessons learned.

RoboGames was an ideal place to field test my new controller, it’s probably one of the most extreme wireless environments I could find. There are so many different devices and robots in attendance that if something was going to trip me up, this event would. For the most part I don’t think I got any radio interference (I ran with the 900 MHz XBEE’s.) There was one instance, in the hall hosting the BotBall Tournament, where I lost communication, but I’m not sure if it was radio related. I did a reset of the system and control was restored.

I also ended up doing a lot more work prior to the event to integrate the controller into my current setup. The original goal was to only control main drive and dome, but I got that done pretty quickly after moving everything over from my demo platform.

I worked out I could tie in the Arduino and control 90% of what I have in the droid. It required a lot more software and wiring, and I started to hit limits on the basic way the Arduino (and pretty much all simple microntrollers) are programmed. As a result I started to work on some multi-threading code to help coordinate activities.

On Saturday, Jonathan arrived at my house to help load but found me feverishly trying to fix a last minute glitch. Magically overnight a servo had failed and I was busy trying to figure out why. Long story short, a batch of cheap servo from China was having problems returning to center and drawing way too much power. This would probably explain why my dome controller had been overheating this last few months, as it was supplying power to the couple of servos I have in the body. So I cut my losses and disabled the Leia Holographic for the today.

Once we got to the games, I decided to use the hidden joysticks exclusively and was super surprised how easy it was to control. Even though the external joysticks were mechanically the same as the internal, for some reason because I was reading them as direct analog, I had finer control of the droid.

I was having to much fun controlling Artoo invisibly, that I really didnt want to pull out the main Arduino controller. Running on just two sticks limited what I could do (basically dome, drive and random sounds.) So, on Saturday night I added some extra code to allow the one button I had spare on the external stick to trigger events. I could tap out codes (1 for scream, 2 for whistle, 3 for pie panels, etc. etc.). And for the most part it worked, but sometimes Artoo would miss count and I’d get a scream instead of a Leia message 🙂

On Sunday morning I awoke again to problems in Artoo. I have so much new wiring, and none of it really planned, something was bound to go wrong. He’s recharged over night and when I figured him up to drive him out to the van he would move. His normal bootup sound didnt play so I knew something was up. I checked the built in battery meter and it was showing 19V. I knew this wasn’t possible so suspected something had shorted. I’d a similar issue before, and it was one of the small 7805 voltage regulators on the power board. It had overheated and failed, so instead of delivering 5V to some systems it was allow 12V thru – and tricking the power meter to show 19V. I swapped it out and we were back up and running – but I really should think above removing those 7805’s from the setup.

Next steps in the development are to fine tune the internal joysticks, and develop a better way to trigger events on just the two sticks. I have plenty of buttons and the LCD screen, but I loved just using just the joysticks. I’m thinking something similar to the JEDI controller gesture/stroke system. I also need to further develop the multi-threading code to allow me to perform multiple task in parallel. e.g. drive/dome while a routine like the Leia Hologram sequence is played out (panel open, extend Leia, pause, play sound, pause, close panel.)

I’m also not sure if I want to continue the development in my current droid. I still have my old setup in there and can flip back and forth, but the wiring has become and issue (and probably the cause of the short on the 7805.) At some point I will need to decide which direct I want to go and rewire or keep the new controller for droid #2.


Posted by Chris on April 22nd, 2011 in Electronics, Events | 2 Comments

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WonderCon 2011

Well WonderCon is done for another year. Lots of fun, good company, tons of photos taken and a full builders panel again.

I think this was the largest builders turn-out we’ve ever had at WonderCon, by my count there were at least 6 droids and 10 builders in attendance.


No major problems to report, nobody lost any parts, screws or having a droid die half way around the show floor. Although Max’s drive system was making some funny noises by late Sunday, and I did manage to break a door panel off but was quickly fixed in time for the panel.

Here’s some highlights, starting off with the obligatory cute kids. The Jawa is the son of fellow builder Ryan Goff, and he did a great job hamming it up for the crowds.



Gerard did what we be believe was his first interview, the guy was from SiriusXM and was more of a geek than us and asked all the right questions. From the look of it the Geeman enjoyed it!
Looks like Matt also enjoyed showing off his droid

And bumped into a few strange characters along the way

Johnathan played the perfect droid security guard, sporting his new shirt. Can’t wait for the run of these!

But was pretty surprised at the price of pizza the convention center.

Here’s some of my fav costumes/characters

As usual more photos in the gallery.


Posted by Chris on April 4th, 2011 in Events | Comments Off on WonderCon 2011

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