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Charles Steinkuehler
Worked at NewTek
Lives in Topeka, KS
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Charles Steinkuehler

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The season 2.0 premier of +BattleBots airs tonight! Tune in or set the DVR!
https://www.facebook.com/Megagreg/posts/10154362971774225
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Charles Steinkuehler

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Vacuum tube cell-phone trivia from the latest Embedded Muse (http://www.ganssle.com/tem/tem306.html):

A smart phone has well over 100 billion transistors. If we built one using tubes the phone would be about the size of 170 Vertical Assembly Buildings (the largest single-story building in the world). That would certainly discourage texting while driving. Weight? 2500 Nimitz-class aircraft carriers. And what a power hog! Figure over a terawatt, requiring all of the output of 500 of Olkiluoto power plants (the largest nuclear plant in the world). A tube-powered phone would run a cool $50 trillion, almost the GDP of the entire world.
And that's before AT&T's monthly data plan charges.
The Embedded Muse 306 with some neat firmware tricks and a briefing on vacuum tubes.
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Charles Steinkuehler

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An interesting twist on a CNC machine. More cool stuff from the +Pocket NC folks!
 
PocketNC (http://www.pocketnc.com/) is showing off their new FR4 Machine Shield which is made entirely from an +OSH Park PCB panel.  Find them in Redwood Hall (a.k.a. Maker Pro building) next to PancakeBot:
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5 axis milling machine was fantastic. Also Machinekit on BBB.
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Machinekit running on a Xilinx Zynq processor, with Hostmot2 VHDL firmware in the FPGA fabric controlling motors.  Both Xilinx and Altera SoC+FPGA parts are now supported by Machinekit, with full continuous integration of working uSD images (boot-loader, kernel, OS, FPGA bitfiles, and Machinekit packages) very close to complete.
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Necitec has a kickstarter going for their new CNC cape, which supports 16 isolated inputs and buffered outputs for 4 step/dir drivers and 8 additional signals. Along with the cape, you also get a uSD card for the BeagleBone ...
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Man that thing is tiny. 
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Charles Steinkuehler

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For any of my European friends interested in Machinekit and CNC
We are pleased to invite anyone interested to the first Machinekit meeting in Europe, taking place on July 2nd and 3rd at the Electrolab Hackerspace in Paris/Nanterre, France. Please feel free to join us - share your plans, e...
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I'm looking to convert an old HP LJ8100 fusor into a PCB laminator by adding a drive motor and intelligent temperature control. Anyone know a good starting point for open-source software for PID temperature control? Ideally with a stepper motor speed control as well, but I can probably add that if needed. I'd like something with an LCD display and an encoder/push-button interface like the various 3D firmwares.
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Koen Kooi's profile photoRyan Carlyle's profile photoCharles Steinkuehler's profile photo
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I haven't looked at the Repetier code...thanks for the suggestion.  I'm not real worried about the motor part...it's a laminator so basically a constant speed would be fine (and no sudden accel).  It's something a 555 and potentiometer could handle well, but I figure there will already be something 'smart' to control the temperature...might as well have it generate some step/dir pulses at the same time!
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I'm having a horrible time trying to get a workable stencil for some prototype SMT boards.  Laser cut plastic just melts and has horrible edge quality, and toner-transfer has been a complete failure so far:

* Vinyl: melts at about the same temperature as the toner and doesn't peel off like it's supposed to
* Parchment paper: poor resolution and fill density
* Direct etch of epoxy coating on soda can aluminum: Doesn't actually etch on the 75W laser at our makerspace

I've ordered some "real" toner transfer paper (Dextrin coated paper from Pulsar) but it won't show up for a couple of days.  Got suggestions for anything else I should try?
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This was a universal ils-12.150 but on super low power and high speed. You should have no issues on your laser. 
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Super awesomely cool!
 
Now testing .kicad_pcb uploads to OSH Park!
"This means that you can place an order without going through the plot process, worrying about drill formats, or fiddling with CAM settings. It also means new users can simply grab your design files and place a pcb order without worrying about installing Kicad at all."
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Best SMT Reflow Controller?  What's the best open-source reflow controller for making a small home reflow oven?  I found the ControLeo2 (http://whizoo.com/), which looks pretty nice.  Is that the best option, or is there anything better?
Lead-free solder requires higher temperatures than leaded solder. Leaded solder is dangerous and socially irresponsible so you shouldn't be using it! Take a look at a typical reflow curve for lead-free solder: It is easy to think that the most important part of the reflow curve is the maximum ...
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I have one of these, but haven't found the time to assemble it.
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Just ordered new boards from OSH Park.  These are to adapt Mesanet DB25 adapter cards to the DE0-Nano ARM SoC+FPGA development board that can now run Machinekit.  True analog servo support and MHz+ step and encoder count rates!

https://oshpark.com/shared_projects/ZSjsiCUd
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