Filament width sensor, mini quadcopter and more … (Meetup 10/17/2014)

We had another awesome meetup last night, lots of different projects going on and some more new faces.

Chris showed of his filament width sensor , we built the pcb last week in the reflow oven. He got it to work and was testing it the past week. Looks like it works great. Next step is to integrate it into a 3d printer so that it can measure and adjust the printing according to the actual diameter of the filament.

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Some of the other projects currently happening is the LED POV Globe that Albert and Gerhard designed. We cut their first prototype last night and they hope to have it spinning by the next meetup. It’s an impressive design and I can’t wait to see it in action:

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Another project that grabbed every-bodies attention was the mini-quad experiments that Romeo is busy with. He got his hands on some of the motors used in the Crazyflie Nano Quadcopter. Last night the goal was to get them spinning and lifting a basic lasercut frame.

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After some power tests it was decided to tie it down to the table… (before someone loses an eye)

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Success!! (Though not stable by any means…). Here is a video of the first lift:


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(Some more raw video footage here)

Next up is some control electronics and with a bit of luck there will be a bunch of these flying around at BinarySpace soon…

Other projects worked on included the sumobot builds, standalone arduino compatible boards etc. There was so much cool stuff going on that I never got to my own projects :p

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All in all it was a good evening. Thanks to all and see everybody next week for the Infinity Mirror build :)

T

 

Google Cardboard Event

Last night we had our Google Cardboard event, and what fun it was. Lee did the presentation and helped everybody get up and running with their Google cardboard setup (even if they used an iPhone ;))

DSC_7453There are a variety of cool apps available from flying demo’s to first person shooters. You can even watch YouTube videos in a very cinematic experience!

DSC_7447The rest of the evening was spent with everybody staring at their phones and behaving strangely…

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Thanks to everybody who joined us last night and a special thanks to Lee who organised everything. Hope you guys enjoyed it!

Till next time :)

 

 

GeeXpo – ‘Show and Tell’

We were invited to do a little bit of show and tell at the GeeXpo this weekend at the North-West University (Vaal Triangle Campus). We weren’t sure exactly what to take along so we decided to take as much as possible!

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We ended up with two tables filled with 3d printers, various robots and lots of 3d printed items.

It was deliciously geeky and colorful…

We met with a lot of great people and discussed various fun activities/projects for the future.

It was a great experience showing people how all the robots worked and explaining the whole concept of 3d printing. I guess we sometimes get immune to the wonders of 3d printing and robotics and it was a great experience to see how people react to printers printing objects and little robots running across the floor.

Young and old asked all kinds of questions and we had loads of fun explaining it to everybody

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We hope to do more show and tell’s in the future so if anybody wants us to come do a show and tell at your school, club or event then please do let us know :)

Thanks to Lee, Sebastian and Chris who came out on Saturday to help with the Show and Tell. Thanks to Sune from the NWU who invited us.

Hacking MyEskom

[written by Chris Swart]

Eskom recently introduced their new grid power status tracker; where Eskom keeps us up to date with their Green/ Yellow / Red power status, where Green indicates the grid is stable, orange shows an increase in grid congestion and red indicates the grid is saturated. At the orange level, it is recommended you switch off unneeded electrical appliances, while at the red level Eskom request you switch off any appliances that is not critical.

This new status tracking website does make it easier to stay up to date, but a stand alone display will make it much more visible, and maybe help reduce electrical consumption when a bright red display confronts you. To get the data from Eskom’s website, a BinarySpace challenge was launched on a Friday morning, with a midnight deadline. The goal was simple: Create a Python script that will return the current status, without using too many libraries. Normally this involve scraping html pages for the appropriate tags and posting back the results. But Eskom threw an oddball in using a dynamic page that does not contain any real data in the html code.

Chris managed to get the values using webkit.WebView but more as a workaround as a true solution. Lee found a way in bash, but still had to parse the JSON with an external tool, and had to rewrite the code to work in Python. Between Sebastian and Lee the script was perfected.

A red herring appeared in the form of City level status. The MyEskom website allows you to view the status of your specific area instead of the national status. This can become handy for a visual indicator, or for building hardware that automatically switches off heaters, geysers and pool pumps. Passing the city to the website is a possibility, but makes the script slightly less user friendly since area ID’s are used instead of names.

The solution: sign up on the Eskom site, set your area, and pass the username and password into the Python script.

And the resulting Crowd Sourced Code writing script is available here: http://pastebin.com/t9hGGigU

Now to implement some hardware. Tom added the script to his homeserver, sending the data to an Arduino to display the status on some Neopixels. He laser cut a perspex square and stuck the Neopixels in.

Now a display lives at Binaryspace to indicate the power saturation status.

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BinarySpace T-Shirts

Hey Guys and Galls,

We now have shirts :)

On the front is the text: “Will Hack for Beer”

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And on the back is the BinarySpace logo and url

IMG-20140724-WA0001These are the shirt sizes available.

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We will take orders until Tuesday the 29th and then place a big bulk order.  You can use the button below to place your order. Remember to send us an email with the size(s) you want to tshirt@binaryspace.co.za

* Quantity

BinarySpace Monthly Project Premiers on 31 July 2014

We have seen lots of people come and go at BinarySpace. Unfortunately they sometimes get bored because they don’t have a project of their own to work on and we don’t always see them again (although they do stay in touch).

Bringing a project to work on is definitely not a requirement to come and visit and even have a beer, but let’s face it, It’s more fun working on something cool. We’ve done a few group projects in the past (Valentines Day Flower and xMas Beer Xylophone just to name a few) and they have been very popular and loads of fun.

To solve this problem we are now going to try and do a monthly project at BinarySpace. We will have a new project every month with one or two project build nights (depending on complexity of the project). The idea is that you can show up for the meetup and build something cool to take home. We will try to keep costs as low as possible, but also keep in mind that we do not want to build a blinky light every month.

For the premier of our Monthly Project night we will be building a pocket sized robot arm!


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This project will be done over two evenings. It’s possible to build it in one evening, but this way you don’t need to rush it. Also if you can’t make the first evening then you can still start on the 2nd evening.

The monthly project concept is still highly experimental and this is a test to see how well this would work. If you have any project ideas for the monthly project then feel free to mail us on projectnight [at] binaryspace.co.za

Details

More details on the pocket sized robot arm: http://www.thingiverse.com/thing:360108

Project Nights are 31 July 2014 and 7 August 2014

Even if you don’t participate in the monthly project nights you can still come and visit

The pocket arm consists of a few servo motors, some lasercut parts, nuts and bolts and a “brain”.

You need to provide your own “brain”, for example an arduino. There is currently code available for using either an arduino or a raspberry pi. You can ofcourse use something else but would probably need to do your own kit.

The kit for the robot arms comes in two flavours:

Mechanical Hardware Only (Lasercut pieces and nuts/bolts) - R150

This Kit provides you with all the required lasercut pieces and all the nuts and bolts needed to assemble it, but you will need to bring your own servo motors and “brain” (arduino)

You would need 4 9g Micro Servo’s:

Please note that you can’t assemble without the motors, since the motors are part of the structure.

Mechanical Hardware + Servo Motors - R350

This Kit provides you with all the required lasercut pieces and all the nuts and bolts needed to assemble it including the required motors, but you would need to bring your own”brain” (arduino)

To reserve your kit(s) please send an email to projectnight [at] binaryspace.co.za. The cutoff for kit reservation is the 28th of July

 

This week at BinarySpace – 17 July 2014

We had another great meetup last night, even though we were only a few. The keg system got a few bugfixes and seems to be running smoothly. The NeoPixel behind the tap now spins while pouring beer. We are currently investigating adding an RFID reader, but we’ll see how it goes. The actual top still needs attention as well and the electronics needs a cleanup. But it works great!

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Beer consumption is now being logged reliably and you can view it at “The Keg @ BinarySpace” site.

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We recently got our hands a a numeric led display which didn’t work (or atleast we weren’t sure how it worked). We opened her up, tossed the old electronics and spent a good time reverse engineering the display (Sebastian did a good job of tracing all the signals). Once we knew how it worked it was a matter of putting a small test program on an arduino and giving it a go.

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We were rewarded with an animation of all the segments being turned on one-by-one. Gys and Lionel have plans to make a wall mount bracket for it. As soon as it’s attached to the wall we just need to decided what to show on it, time? beer consumption? naughty words? Only time will tell :)

Lastly I powered up the pocket robot arm for a quick spin. This will be the first project in our planned monthly project evening. More info coming soon!

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Till next week!