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October 25 2014
October 20 2014
Since my previous post I have added a couple additional temperature sensors to my piHouse project. One is an outdoor temperature sensor that I previously programmed but never installed outside, and the other is a new sensor in my bedroom. This involved some hardware planning and effort installing because I had to run a cable through the house and outside, but once I tested the new cable run, it was relatively simple to duplicate the software for the sensors I already had.
The part of this that took the most time was pulling the cable and then soldering the connections. The biggest problem I have is placement of the outdoor sensor. I am having issues with direct Sunlight.
Here are some highlights, you can find the whole story here. This time I also include some examples of the commands I use on the raspberry pi to obtain the data.
When testing my hardware connections, I use this command to ask the pi to take a reading and then display the result to the command line:
house@raspberrypi ~ $ cat /sys/bus/w1/devices/28-00000512f401/w1_slave 2>&1
Five years ago, a dear friend designed the logo for my business, which I subsequently protected with a service mark. Although I paid her for her work I wanted to say thank you with more than just money.
Having an interest in decorative etching (among other steampunk pretensions), I decided to etch the service mark from the patent office into a 9 x 12 sheet of solid copper. After trying to transfer etch resist to the plate a number of ways (transparency and newsprint and a hot iron didn’t give sufficient quality), I finally hit on success after BrantH suggested I spray paint it, and remove the paint with the laser cutter. Here’s the process from start to end.
First, the plate was spray painted with gray primer. I originally tried Krylon, but I think it was ironically too durable, and resulted in a poor etch on the first attempt. I had to buff that out and start again. It also led to an interesting conversation at the hardware store, where I had to explain why I wanted a “less durable paint.”
Once the plate was painted, I laid out a border in Corel Draw, and imported the image downloaded from the USPTO. Then the design was cut from the paint. After some trial and error on smaller test pieces, I used speed 40%, and power 40% on the 50 watt laser cutter.
After the completion of the cut:
Once the cut was complete, the plate was bathed in a solution of 1x muriatic acid, 2x hydrogen peroxide. I eventually ended up making about three times the amount of solution shown here in order to get a stronger reaction.
This is after the etch was completed. You have to watch and determine when you have a sufficiently deep etch, it took me about 30 minutes.
The final proof the etch is deep enough is unfortunately only when the paint (acting as etch resist) is removed using acetone. If it’s not deep enough, get out the buffing wheel, and start over. This time however, it works!
Rubbing a bit of black enamel paint into the cut helps it stand out a bit better, particularly for the smaller text.
The final product, framed for presentation:
Thanks to everyone who made it to the warm, cosy, October book club meeting. Great to be back to the tea and biscuits model. Due to popular demand (and scheduling conflicts) we’ve decided to move the meetings to the second-Friday of every month. The next meeting is Friday, 14th November, at 19:30.
The book chosen is one that swept the awards this year, ‘Ancillary Justice’ by Ann Leckie.
The novel follows Breq — the sole survivor of a starship destroyed by treachery, and the vessel of that ship’s artificial consciousness — as she attempts to avenge herself on the ruler of her civilization.
New members, both tog-members and non-members, are welcome! Just bring a sacrificial snack See you next month!
October 19 2014
October 17 2014
As halloween is drawing near, Tog will be holding an electro luminescent wire workshop this Saturday 18th October from 2pm until 5pm . This is a great way to add a glowing element to any costume or accessory.
For €20 you will receive two metres of precut el wire, colour can be picked and paid for on the day. Along with this there is the portable power pack, batteries included. The power back can be set to flash the el wire, turn on and off. Guidance in soldering el wire and appending to garments on the day. The 2 meter lengths come presoldered so soldering is not neccessary unless you need to attach several wires together. For this reason it’s over 18s only. Bring any clothing or wearables you may need to work with on the day. More el wire can be purchased if required. No pre booking required.
The Open Organization of Lockpickers’ Chicago chapter is hosting it’s annual event at Pumping Station One! The Bavarian tradition of Oktoberfest is celebrated every Autumn in Munich, with amusements, traditional German/Bavarian fare, and of course, Bier!
TOOOL’s Locktoberfest celebrates our love of locks and locksport through locksport themed amusements, presentations, games, contests, and of course, bratwurst and beer!
Join us, 3pm-10pm, Saturday, October 18th at Pumping Station: One
Locktoberfest 2014 is a BYOB event.
Check out our pictures from previous years here: http://toool.us/gallery
October 16 2014
I am collaborating with the Betty Brinn Children’s museum to create something similar to this.
This sculpture has 844 balls hanging from strings wound around a pulley on a DC motor shaft. Ours will feature somewhere between 320 to 500 balls. I am currently working on a prototype to test and qualify different electronic and control platforms. It’s made out of 40mm x 40mm aluminum extrusion, laser cut wood motor mounts, 5V steppers, and ULN2003 based stepper drivers. I have been using an Arduino mega for now to test the motor and drivers.
The next step is to write software to create “voxels” with instructions akin to G-code. Additional software will be necessary to simulate the animation. G-code like instructions will be used by microcontrollers to control steppers in order to create an animation.
Saturday’s Solder Party was fantastic! We got all the circuit boards trimmed and tinned.
I’m thinking of doing this again for future projects (and I’m looking for circuit knit ideas and collaborators!). A few things I learned from Saturday’s event that will be helpful:
- Removing the scrap wire beforehand would be helpful and/or we need better diagonal cutters in the lab.
- A piece of cardboard behind the board keeps flux off the table, and provides a guide for blocking the knit.
- Boards to practice on would be helpful. Also, wetting down the boards will prevent scorch marks.
- We have replacement soldering iron tips in the lab.
- Bacon really is the best pizza topping and La Villa is the Pizza In A Bag place.
We didn’t get everything done, so I’m hanging out in the lab this week to finish. (Jay Hopkins apparently has become addicted to soldering knit circuit boards, and has been working on them even when I’m not around! Thanks, Jay!)
Everett took great pictures. I’ve posted a few here but you can find the entire album on our Meet Up page. Please visit, and tag yourselves!
October 15 2014
Massive thanks to everyone who attended and raised points.
After a number of years sterling service, we’re sad to announce that Mick has stepped down as Director. Mick has been a LHS director since we were in the previous space and has been instrumental in putting us into profit and sorting out the finances. I’m extremely sorry to see him go and massively thank him for all the work done (insert mailing-list compatible standing ovation here).
Fresh from the success of the Cube, we’re pleased to announce that Matt Collins has stepped up and joined the directorship. He was nominated by a couple of people and confirmed unanimously.
Minutes and other paperwork to come shortly, but thanks again to everyone who’s been involved over the past year; old faces and new.
October 14 2014
There will be an AGM tonight (Tuesday 14th October), the meeting is open to all (member and non-members alike) and is a chance to discuss issues around the space, review activities that have taken place over the year, and put forward suggestions about Hackspace. There will also be elections for the positions of Directors of the space.
If you have and points of order/interest that you would like raising add them below or to the mailing list and we can get a running order together.
Hope to see you there!
October 13 2014
NERP is not exclusively Raspberry Pi, the small computer and embedded systems interest group at Pumping Station:One in Chicago. NERP meets every other Monday at 7pm at Pumping Station:One, 3519 N. Elston Ave. in Chicago.
Joao (“Gamblit” on the PS:One mailing list) will give an introduction to JTAG at NERP on Monday. JTAG is an important tool for embedded developers, manufacturers, and hardware hackers who do reverse engineering. The JTAG interface is included in all but the smallest processors. For use in degugging, JTAG provides real-time read/write access to a chip’s cpu, i/o systems, ram, and mass storage. It gives a user live access points inside a running cpu from which they can take over its brain, or just burn a fresh rom.
Physically, JTAG consists of a small set of pins on a microprocessor, a hardware interface device, a cable connected to a host computer, and a (not physical) protocol. JTAG is most generally useful for programming the flash in embedded controllers. That much is simple. The rest, of course is software.
Joao’s tools and target will include:
– Linux Host (Fedora VM)
– GDB (GNU Debugger) and DDD as debuggers
– No IDE (VIM and direct GCC if I need it)
– Olimex USB JTAG and TIAO USB generic interface
– Olimex Atmega128 board (Atmel Atmega128 MCU)
I’ll be talking about flash programming and debugging software running on a
micro-controller. I’ll also be showing that it can read and set
micro-controller pins but not getting into depth about how that actually
works, as that would need some additional low-level explanation. Depending
on feedback and available time I might explore a bit of it.
Find NERP and Pumping Station:One at
Doors open at 6:30pm. The next meeting is October
NERP is free and open to the public.
Ed Bennett ed @ kinetics and electronics com
Tags: electronics, embedded, NERP, Open Source,
raspberry pi, hackerspace, Beagle Bone, Element14, Pumping
October 12 2014
There are a lot of online mask patterns that can be printed and cut out with scissors, but it would be much nicer to laser cut one. Let the laser do the hard work. I did these four mask designs tonight; they are perfect for a last minute costume for makers on the go or their kids. Now you can put the roll of toilet tissue back and do better than being a mummy this year. Download the patterns on Thingiverse here.
October 11 2014
Pumping Station: One is having a Halloween Party! The theme for this party is: MONSTER MASH! Bring your best ghouls, wights, Frankensteins, wizards, and werewolves to celebrate the holiday with us.
The party will start at 20:00 on Saturday, November 1st. We’ll have some beer and food available, even a Pumpkin Ale which we will be brewing at PS:One this Sunday! If you want anything in particular, feel free to BYOB.
Entrance to the party is free, but a donation of $20 to support the hackerspace is suggested. While it’s not required, you can RSVP on the meetup group to let us know you’re coming.
(We would also really appreciate if anyone wants to come by Sunday morning to help with the cleanup.)
October 10 2014
Thanks to RUA RED for hosting an excellent event!
If you’d like to get into beer brewing or are already a brewer, or just like & appreciate beer, then come down to the space at noon on Sunday. We’ll be having a beer tasting and brew day. We’ll likely taste a brew we made recently and make something new. Justin will be the brewmaster. Of course, you must be at least 21. See you Sunday!
You can RSVP on meetup if you like but it’s not required.
October 08 2014
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