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SEEDStack

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UCSSPM - Unified Clear-Sky Solar Prediction ModelOpen Solar Power

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Mission-Log

Freeswitch and Sipgate-Team Trunking

Just a quickie and not really Apollo related but it took me a while to figure out how to implement Sipgate-Team trunks into Freeswitch, since the wiki only covers the single user sipgate accounts:

→ Read more...

2012/09/20 08:12 · chrono · 14 Comments
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Elonics E4000 complete reference documents leaked

Good news for anyone playing and developing cheap SDR technology with the Elonics E4000 (e4k) tuner chip: Until now, working with the chip has mostly been guesswork and trial and error through reverse engineering, in order to get the SDR's to work. Today the complete Elonics E4000 reference documentation was leaked, so grab and mirror the e4k datasheets and application notes, while they are hot and available:

https://skydrive.live.com/redir?resid=E55F3F5F75B5A7BB!1160

Thanks for sharing :)

Related Mission-Logs:
rtlsdr-osmosdr-gnuradio-fm-receiver
active-wideband-receiver-antenna-for-sdr

2012/08/22 14:11 · chrono · 15 Comments
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UmTRX publicly released

The UmTRX is a dual-channel, wide-band SDR transceiver (so it can send & receive) with 1GbE connection. It is developed by Fairwaves team to be used as a transceiver for OpenBTS GSM base stations, but due to its software defined nature, it could be used for many other radio applications as well.

[UmTRX SDR]

If the speed of development continues at this pace and more and more people finally realize the benefits of open resources and release their projects under an open & free licence, in less than 10 years, there won't be any proprietary, patented and overly expensive, hardware-based radio left on the planet. Awesome!

2012/08/05 12:31 · chrono · 25 Comments
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HOWTO disassemble a brushless outrunner motor

Shortly after the collet-chucks-for-picocnc-arrived, the brushless outrunner motors for this project followed suit. After closer inspection, both motors appear to be as equal as their datasheets suggested so the first prototype will be assembled with the brandless 50EUR C5045 890KV brushless outrunner (the red/black one on the right).

In order to progress picocnc we have to replace the original shaft with the new collet. But how do you take it apart without special tools? The following 7-step HOWTO will guide you through the simple dis-assembly process:

→ Read more...

2012/07/17 21:40 · chrono · 23 Comments
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Motor-Porn: Honda GX25 moved into new APU rig

What started out as a simple thread on a mobile-home board, ended up in more than 50 pages of discussion about a neat and small generator project based on a Honda GX25 and a Torcman 430-30 brushless outrunner motor. Some people always seem to ask, why anyone would build something like that, if they could get more output power for less money from a ready made product? Because available products don't really match the requirements and why would anyone pay money for something one actually doesn't really want or need?

Apollo-NG needs multiple independent energy sources to be able to function autonomously and independently from grid infrastructure. Although the basic requirements are supposed to be covered by alternative power technologies like solar and wind power, it never hurts to have a fallback for a rainy day. That's where the apu comes into play:

[Honda GX25 in new APU rig's frame]

→ Read more...

2012/07/17 09:41 · chrono · 9 Comments
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ER16/11 Collet-Chucks for PicoCNC spindle arrived

Leave it to the Chinese, to come up with good quality products, completely unavailable anywhere else, for a really awesome price. After 3 weeks of waiting, the collet-chucks (ER11 & ER16) for the picocnc spindle finally arrived directly from Hong-Kong:

[CTC-Tools ER16/ER11 collet-chucks, collets and clamping nuts in comparison]

There are a lot of ER11 and ER16 collet-chucks out there, so what makes these one so special? Simple: These ones come with an 8mm shaft, which is going to be inserted as a drop-in replacement for the 8mm motor shaft of a 5045 class brushless outrunner.

After a preliminary review, the first prototype will be built with the more massive ER16 collet-chuck, since the threading will probably survive longer and the collets also seem to be more heavy-duty than the ER11.

If it works and all other parts play equally well, it should be possible to build a robust and precise enough power spindle for a CNC router/gantry system for less than 100EUR. It might also be an attractive option for other Hackerspaces and FabLab's who are building CNC routers as well.

More Details
PicoCNC Main Page

2012/07/08 18:59 · chrono · 76 Comments
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The Illuminator - A LED Light built from trash

Building things can be a lot of fun. Even more so, if the parts you use are things, that other people threw away. A while ago, the workbench needed a more appropriate lighting and 3 Luxeon 1W LEDs were lying around in the MISC box, other parts were collected from trash found in containers.

[Illuminator in Low-Power mode (Red - 0.5W)]

→ Read more...

2012/07/06 06:18 · chrono · 19 Comments
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Hacking devices always comes with the risk of breaking them in the process, which makes it often undesirable to hack on something, when you know, that you only have one device you may need for production purposes. Luckily, cosmo had a look at the Apollo-NG Wishlist and donated one more TL-MR3020 for the cause and as a result, it was pretty easy to figure out how to connect an external antenna to the TL-MR3020.

Details about the hack can be found on the Argus Project page

Thank you cosmo :)

2012/07/04 09:32 · chrono · 13 Comments
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Intelligent Turn Signal

While watching some fast cars on a multi-lane street from above today, one observation came up with repetition: Fast movers, that wanted to overtake slow movers (on the right line) almost never used their turn signal (blinker) to indicate their intention to move to the left lane and afterwards to move back to the right lane. Why is that and how could that be helped?

→ Read more...

2012/04/26 07:44 · chrono · 5 Comments
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Exciting News: MediaGoblin moves to SQL tomorrow

A7B5BC2V79RH. Helping upstream projects directly seems to be a much more logical choice to put work into, instead of rewriting code to enhance it for oneself only. Today, the development time was invested into the new video.js interface for MediaGoblin, to give it a real “production grade” finish with MediaGoblin visual identity and to make it easier for other hackers in the future, to change the skins to their liking.

For tomorrow, MediaGoblin promises a real treat: The change from MongoDB to SQL.

You will have to wait to find out, if it's just one of April Fools' Day's hoaxes or the real thing :)

2012/03/30 21:38 · chrono · 6 Comments
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