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June 05 2017

NERP Tonite: MOSFETs with Ste!

Mosfets – They can be “on” — They can be “off” — They can even be in between! Tonight at NERP, entrepreneur, engineer, and really good teacher Ste Kulov will guide us into the world of mosfets. Metal Oxide Semiconductor Field Effect Transistors if you want to impress your friends.

N-Channel MOSFET [wikipedia]

Since mosfets are a wide and deep subject, I asked Ste where he wanted to focus his talk. With great economy of words, he said it better than I could.

“Most of the generic stuff, fairly quickly.  A few simple examples I was probably going to cover are: making a logic inverter, a logic controlled load-switch, and reverse battery protection. Simulating in LTspice [circuit CAD], since I can draw that stuff in two seconds and put it on the screen.  If you want to do a power MOSFET application, I would need to see the datasheet for it.  Also keep in mind that high current stuff is no good for breadboards. If you need a list:  4 vs 3 terminal, body diode, Rds(on), gate drive, switching speed, N-channel, P-channel, CMOS digital logic, CMOS analog switches.”

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. Find NERP and Pumping Station:One at­

Tags: electronics, embedded, NERP, Open Source, raspberry pi, hackerspace, Beagle Bone, Pumping Station One

June 04 2017

Spindles of Wood

“Spindles of Wood” is not the name of the latest album from some obscure Icelandic emo band! Instead they are actually the front wheel spindles for our No-weld PPPRS vehicle. (You probably remember the frame from last time.)

While most teams in the Power Racing Series just buy pre-made spindles and weld them in place, our “No-weld” spindles were built using wood, glue some staples/screws, and use some 5/8″ bolts to attach to the car, and for the wheels to attach to.

We’ve still got to get the whole steering thing worked out, but we’re on our way! (Things are moving a bit slower than we had hoped, so we might debut this thing at Detroit in July instead of Kansas City in June, but we’ll see how it goes.)

June 02 2017

Sommerlukning 2017

Da er det sommer igjen og biblioteket har begrensede åpningstider.

Vi holder da til på digital verksted mellom 16-18.

June 01 2017

3 Scoops of Signage

Julie and Carl of Scoops Ice Cream & Candies of Kenosha, approached new Makerspace member, Brandon Minga, with their project. They were given recommendations from other projects he’s done in the are including Mike’s Chicken & Donuts and the Modern Apothecary. Scoops was looking to enhance and draw more attention to their new location with a large exterior sign. Going through the concept and design process Minga quickly decided that the sign design was also going to become their new logo. Once the final design was rendered he quickly learned how to CNC a template to hand plasma trace the design out of sheet metal. The middle of the sign was also hand cut, roll bent and broke to match the bubbly ice cream cone shape. With a little help from friends a the Makerspace, he ground down welds and drilled 44 holes for the light bulbs. After all the holes were drilled Minga fit the sign with sockets, wired up the sockets and tested the electrical. Working with Prodigy Sign in Kenosha he also coordinated the hanging of the sign.

Any project starts with a sketch.

Nothing wrong with learning a little g-code.

A post shared by Mingadigm (@brandonminga) on May 2, 2017 at 12:47pm PDT

Took that g-code and used the handmade CNC router to cut out a template (note to self, don’t use OSB for plasma templates).

Traced template with hand plasma cutter.

Hand cut, roll bent, metal break and tack welded the bottom shell.

Hand cut and used the break to bend my own c-channel for the stabilizing guts of the sign.

<!--[if lt IE 9]><script>document.createElement('video');</script><![endif]-->

A little help from my friends!

A post shared by Mingadigm (@brandonminga) on Mar 31, 2017 at 3:33pm PDT

A little custom install and wiring….and we have lights!

Can’t forget the paint! Primed inside and out, the sign got coated with some retro color.

Installation day was very windy, they called two crews in to stabilize the sign as they anchored it to the building.

This is a by Brandon Minga

This project was done at the Milwaukee Makerspace,  thank you, gang!

May 31 2017

06-10-2017 An update on Cybersecurity Regulations & Standards

“As infosec professionals, we have to keep up on the latest threats and issues emerging in cybersecurity.  Certainly the recent WannaCry incident is a perfect example of this. But in addition to that, we also need to keep abreast of updates and changes in regulations, standards and the like that can also affect us and […]

May 30 2017

Making stuff for scientific conferences

Last year I was making little things for a conference my work organized in Chicago.

You’ll find more info on my blog posts. But as a teaser, it involved laser-cutting, glue, Inkscape and a lot of mistakes (but I didn’t took pictures of those, too bad).


A person touching a device

Slide Ruler

Circular slide-ruler in acrylic on plywood board.

Demonstration für echte Netzneutralität: Mehr Datenvolumen für Alle!

Am 31. Mai 2017 ab 9:00 vor der Lanxess Arena in Köln. Kommenden Mittwoch findet die Hauptversammlung der Aktionäre der Deutschen Telekom AG statt. Im Vorfeld sorgte die Telekom mit "StreamOn", dem neuesten Angriff auf das freie, offene Internet für große Aufregung. Anstatt den eigenen Kunden mehr Datenvolumen zur Verfügung zu stellen, versucht die Telekom sich als Gate-Keeper für Online-Inhalte zu etablieren.

May 29 2017

We’re open for Craft Night

May 28 2017

Quick Layout: Four Hole Bolt Circle

You don’t always need a CNC machine or thousands of pounds worth of equipment to get the job done. Here, we’ll be laying out a 4 hole bolt circle suitable for mounting something like a stepper motor or bearing flange using just a ruler, compass and centre punch.

Mark out your material, and centre punch the middle. This will be the punch mark for the central spindle of our motor. Scribe a straight line through the centre in the orientation that you want for the first two of your holes. This is your base line.

Set your compass dividers to the radius of your required bolt hole and scribe your first circle. Centre punch the two intersections of your scribed line and the circle.

Set the dividers to around about the diameter of the bolt pattern, and then scribe a short arc either side of the baseline using each of the perimeter punch marks as a pivot.

Now that you have intersecting arcs on either side of the base line you can carefully scribe a line between them, ensuring that you head straight through the centre. Punch on the intersection of this new perpendicular line and the circle.

If you have a lot of further layout to do you can touch up an construction lines with the layout marker to keep the work space easy to understand. As with all these sort of things the amount of care you take when placing your punch marks, and setting the compass width, directly influences the quality of the end result. Use a magnifier if you need to!

Transcyberian Crypto-Party 16.6.2017 18:00h

We are very proud to bring the Transcyberian parties from Paris to Berlin!

Transcyberian is a series of club, noise, queer and nerd friendly events featuring futuristic, crypto and activism workshops and experimental electronic performance and DJs. Transcyberian is a hybrid concept inspired by CryptoParty. Our events are LGBTQI+-friendly. As we want everyone to be welcome, there is no entrance fee at our events – however if you can afford a donation, it would be much appreciated.

For our first event we decided to donate all the money we will collect to the Chelsea Manning legal fund operated by the Courage Foundation.





6pm – 11pm : Workshops
Adam Harvey – Facial recognition
Leif Ryge – The pocket litter exchange
CryptoParty Berlin – CryptoBar
more tba
11pm : Live performance
Widescope – Experimental Silence Performance
Midnight – open end: Party
Various Vegetables DJs:
Eutechnik [A/V]
Vertical 67

Late May and Early June at Tog

Hi everyone, we’ve another two weeks of Tog’s regularly scheduled events for you to enjoy.

Monday May 29 – Coding Group Night from 19:00
Tuesday May 30 – Lockpicking Group Night from 19:30
Wednesday May 31 – Crafts Night from 19:00
Monday June 5 – Electronics/Microcontroller night is on from 19:00

Hope to see you there!

Because 3D Printing…

3D Lock

Sometimes you see amusing things at the space. Take for instance, this lock on the bathroom stall. The black piece is actually 3D printed. Yes, someone took the time to measure, and model, and 3D print a rectangular bar to fix the bathroom stall door lock.

Never mind that a piece of wood, or plastic, or metal could have probably done the job in much less time, sometimes you just need to 3D print a replacement part for a bathroom stall door and you bust out the 3D printer and in a matter of hours you’ve got the part you need!

May 23 2017

OpenChaos am Freitag, 02. Juni: Interim

Das OpenChaos am 02. Juni wird sich mit Interim, einem minimalistischen Betriebsystem mit Anleihen bei sowohl Lisp Machinen als auch Plan 9, beschäftigen.

May 22 2017

Air compressor fixed

Air compressor in workshop died few week ago and finally getting around to taking it apart to see what issue is. Seamed like motor might have ceased however it was quick fix. 

May 21 2017

TOG Calibration

If you work in industry or business, you probably have your electronic test gear and multimeters calibrated regularly. If you’re an amateur you probably don’t. We don’t have a fancy calibrator at TOG which can cost 1000’s and need regular calibration in itself. We do however have a 2 Euro voltage reference based on an Analog Devices AD548 voltage reference. Checking some of the multimeters that we have around, and the results are surprising.

The reference outputs 2.5, 5. 7.5 and 10V. Now this is a bit of a crude test, because this little reference is not calibrated or traceable to any standard. If you assume however that the voltages it gives are “exact”, a 20 year old Fluke multimeter is reading almost perfectly . Some other multimeters that we checked are a bit off, but still not too bad. We’re going to check some of the ultra cheap meters that we have too.

Fluke 77: 2.499, 5.00, 7.50, 10.00
Standard ST-3343 Clamp Meter: 2.495, 5.01, 7.51, 10.02
Velleman DVM890: 2.47, 4.96, 7.44, 9.92

May 17 2017

TOG May Open Social

Our May Open Social evening takes place on Saturday 20th May from 7PM.

If you’ve never been to our Social, you’ll find it a great alternative Saturday evening in town. Come in and look around. If you’ve never been in before, we’ll give you the grand tour of the space. Talk to members and visitors about projects or things you’d like to do. Ask us about the next phase of our plans for the space and our big cleanup. If you like what you see, ask about joining as a full member. If you see lots of excited people playing with small robot cars, don’t worry. We were running our Electronic build-It workshop earlier in the afternoon!

Hopefully there’ll be, caint, ceol agus craic as usual. The space stays open until the last member is left……usually the small hours of Sunday morning. The evening is free to attend for members and visitors alike. No need to book…. just turn up. You can drop in for 10 minutes, or stay the whole night. We have parking available. Bring beer, food, gadgets! Our doors are open from 7PM. Hope to see you there.


Bronze Casting!!!!!!

As you may have noticed, the Small Metals area has moved to where hot metals used to live. The process has been gradual but successful. We conducted an experiment over the weekend involving plaster investment and molten bronze. There were many variables in this process including new-to-the-space machinery: the kiln, the electric melting furnace, and the vacuum investment table. As well as different materials used, possibly expired flux, a new kind of plaster, and a type of bronze that had been melted a number of times before. All in all it was a great success. Here is a brief overview along with some photos to enjoy.

Seen here is the kiln at a glowing red temperature of 1,500 degrees. The molten bronze getting ready for the pour. Also seen in this picture is the vacuum table for the cast to help pull the metal through the investment.

The Termolyne mini melt electric melting furnace! Bronze has a melting point of 1,742 degrees 

The pour!


Fresh out of the pickle!

-Ella Gentz

May 16 2017

Visitor projects: the most excellent blanket

May 15 2017

What We Talk About When We Talk About Russia
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