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Comment: Re:charge 'em (Score 2) 332

by cr0nj0b (#38715146) Attached to: Ask Slashdot: Setting Up a Wireless Catch-and-Release

I've done this with m0n0wall. http://m0n0.ch/wall/
A computer with 2 network card. One network card plugs into your network. The other network card goes to your guest wireless AP.
In order to block access from the guest wifi to your internal network, you can put in a Firewall ACL to block access to your internal network.
For example, if your internal network is 10.10.1.0/24:
Setup the second interface as 192.168.1.0/24 (or take your pick). On that interface set a block Firewall rule for all traffic with a destination of 10.10.1.0/24. The guest Wireless can still get to the internet, but not to anything on your internal network.

With either m0n0wall or pfsense, you can setup captive portal. This will block outgoing connections until the user registers or logs in.
http://doc.m0n0.ch/handbook/captiveportal.html

Data Storage

+ - Hitachi ships world's first 4TB hard drive->

Submitted by
MrSeb
MrSeb writes "Hitachi, seemingly in defiance of the weather gods, has launched the world’s largest 3.5-inch hard drive: The monstrous 4TB Deskstar 5K. With a rotational speed of 5,900RPM, a 6Gbps SATA 3 interface, and the same 32MB of cache as its 2 and 3TB siblings, the 4TB model is basically the same beast — just with four platters instead of two or three. The list price is around $345 — not great, but definitely reasonable, given the current hard drive climate."
Link to Original Source

+ - Slashdot Q&A with LightSquared Team->

Submitted by Anonymous Coward
An anonymous reader writes "I work with LightSquared and we would like to offer our EVP of Ecosystem Development and Satellite Business for a Q&A with the Slashdot community. Given the timeliness of the news, we would like to propose we immediately solicit questions and close by noon tomorrow. We will provide written responses by Wednesday morning.

Please let me know if this is a workable timeline and format. We hope to hear from you soon!

Patrick Kerley
patrick.kerley@bm.com
(907) 317-3012"

Link to Original Source

Comment: Re:2.4GHz? (Score 2) 375

by cr0nj0b (#38158392) Attached to: Smart Meters Wreaking Havoc With Home Electronics

Because smart meters are probably using some sort of zigbee or other 802.15.4. It makes sense for smart meters to run in a mesh. That way they do not have to have direct connection to the data collection unit. They can use the mesh network to hop over multiple nodes to get the data to where it needs to go.

Comment: Re:Busybox-based linux (Score 1) 135

by cr0nj0b (#37786088) Attached to: Ask Slashdot: Which OS For an Embedded Display Unit?

I will second both points of this. Using buildroot for multiple types of boards/chips. buildroot helps in creating a reproducible toolchain, kernel, apps, and filesystem images. You can add your own application (The main thing to run) as a custom package.
http://buildroot.uclibc.org/

The Atmel at91sam9 series runs fine. Both in graphical and non-graphical environment. I use this for quick proto type testing/dev:
http://www.mini-box.com/pico-SAM9G45-X
(however, I add NAND Flash for os/apps)

As others have stated, Angstrom is also good for building the OS/applications. The build system takes a little bit more care to setup than buildroot.
http://www.angstrom-distribution.org/

Comment: Re:We *CAN* win, if we treat our soldiers well! (Score 1) 244

by cr0nj0b (#37046872) Attached to: Why The US Will Lose a Cyber War

This has created a unstoppable force with one exception. the test unit of 12 team members were highly effective until their DSL connection at the pentagon was DDOS attacked. The Government is asking for Congressional funding to get more DSL lines installed but the current Tea-Party members are claiming that it is an un-needed expense.

Of course DSL lines are an un-needed expense. Each solder needs their own array of fiber optic links to each country.

Comment: Re:DP and Seeedstudio (Score 1) 48

by cr0nj0b (#36649848) Attached to: Dangerous Prototypes: Open Source Hardware Seeding

@HiThere.

Thanks!

I forgot to mention, if you are in the U.S.A, then is is also quicker chipping wise to go with dorkbotpdx mentioned above. Simply for shipping times alone. Seeedstudio's fusion service only e-tests 50% of the boards by default. Even then, I have still had boars that pass e-test, but where the copper meets the pad, it is too thin. This will break the connection. Yes, plated through holes are a little bit harder to re-wrok, but with a little flux and the heat turned down, it is do-able. I have ordered from Seeedstudio's fusion service over 10 times. Although they are cheaper, I ended up spending more time repairing bad boards. I have switch to dorkbotpdx and have not looked back.

There is also batchpcb, but their prices are higher. Also last time I check batchpcb only had green silkscreen and a minimum of 8 mil traces.

-JC

Comment: DP and Seeedstudio (Score 4, Informative) 48

by cr0nj0b (#36646388) Attached to: Dangerous Prototypes: Open Source Hardware Seeding

I have a few of DPs products. The webplatform is cheaper and more useful to me than an arduino/ethernet shield or even the new EthernetPro http://www.sparkfun.com/products/10536

Seeedstudio's fusion service is good price wise, but I will not have PCBs made through them again. Too many bad traces. Pads lift if you try to re-work them.

Slightly more expensive, http://dorkbotpdx.org/wiki/pcb_order , but I have never had a bad board and the quality is much much better.

-JC

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