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Messages - fcobcn

4
Project logs / Re: PAW9 - MrRef
Made a very simple voltage reference using the max6350 2.5v and a 9v battery a couple of weeks ago.
My cheap multimeter is spot on, something I didn't expected.

[attachment=1]

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In any case, I would rather have one of Matseng's boards : )
7
Project development, ideas, and suggestions / MMA7455L BOB free build
Got two PCBs from Ian some months ago, I was waiting to finnish building a reflow oven, and planned to use them as a test board.
Finally this weekend I got everything sorted out and did a first test. It wasn't a complete succes, one of the boards got shorted pins.
This is probably because I didn't use a stencil. In any case the bad board was later fixed using hot-air.

[attachment=3]

I'm using a DIY version of rocket scream's reflow oven controller. http://http://www.rocketscream.com/shop/reflow-oven-controller-shield-arduino-compatible
NOTE: I have six PCBs left, and I won't be using them...
Here's how things look at the moment,

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The two populated boards were quickly tested using the bus pirate.

[attachment=1]
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Thanks DP!
10
Project logs / Re: CNC Stepper Controller
Fantastic work!
I would happily change my current setup for something like your driver:

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viewtopic.php?f=19&t=2414#p23139

Only one suggestion, think of adding a fourth axis driver, I'm currently planning to add a divisor head to my small CNC for jewelry work, having everything on a single PCB would be really cool.
11
General discussion / Re: What homemade test gear have you built and still use?
I really enjoy building test gear and small electronic tools,
Here are some of them already published in the forum.

-The AVR transistor tester: viewtopic.php?f=19&t=3260&start=15#p32204

-Pickit2: viewtopic.php?f=19&t=2848#p28084

-LC Meter: viewtopic.php?f=19&t=3260&start=120#p32725

-Superprobe: viewtopic.php?f=56&t=2751#p27032

ATM I'm working on a ESR meter, based on this design: http://kripton2035.free.fr/digital%20es ... ssian.html
, currently I have laid out the schematic and started to route the pcb.
12
General discussion / Re: Component Organizer (open source)
[quote author="msr"]
Why CO?
One of the reasons I decided to rewrite it was the fact of noticing that there are some cloud-based alternatives (partkeepr, arena partslist - not free nor os) [/quote]

Hi msr, partkeepr is free and open source, the only downside it that you need a AMP server in order to use it, this could be in fact an advantage if you need to access your db from many computers, or if you work with a group of people.
To use it, I created a virtualbox linux server with partkeepr. I have been loading it with data for a couple of months now, I'm very happy with it.
My intention is not to discourage you, just clarify.
I haven't tried your app yet, but it looks great from the screenshots. Keep the good work!
14
Project logs / Re: TMP006 BOB free build
quick update,
I wouldn't recommend soldering this IC with hot air, it's very likely to damage the infrared sensor.
After a couple of tries, I decided to stop frying sensors, until I sort out a reflow method.
On a damaged sensor, everything works OK except for a funny output on register 00h, this problem is documented somewhere in the ti forums.
15
Bus Pirate Support / Re: WIP - Bus pirate v4c case
[quote author="arakis"]you can try exportin our whole SketchUp 3d model into solid works... just make sure you scale it down by 1000. as in SU uses metrers for milimeters[/quote]

I looked into that option, the problem with sketchup is the nasty habit of duplicating polys in order to allow texturing on both sides of a face. When exporting, you need to do a large amount of post work to get a workable model. And to be honest, I tend to avoid sketchup like the plague.

On the other hand, I was looking to learn a proper way of transfering board designs into solidworks, wich is now my cad/cam of choice.

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