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Automatic Nightly Backups for Your Android Device to Your Computer November 1, 2012

Posted by GuySoft in Android, diy, linux, open source, Uncategorized, wifi, wireless.
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31 comments
Android lifevest

Android backup will keep you safe

Hey all,

Friends keep coming up to me and complaining that they had to wipe all their phone because of some attempt to do something.
However, if you give me a brand-new phone and throw mine out of a high-building window, I won’t stop you, because I have a copy of my phone at home, from that same morning, and I don’t even have to think about it.

Want to feel free again? Not scared that this small thing you carry in your pocket with all your life gets ruined? Well, here is how you do it:

Things you will need

  1. A computer running Linux you can ssh to with Rsync installed, or windows running cygwin with rsync and ssh installed.
  2. Your device needs to be rooted – I am afraid thats a requirement for Titanium backup and all programs that back up app data
  3. Titanium backup – You can use the free version for backing up, but for a single-click restore you will need to pay (I bought it and recommended you do even if its the only thing you ever buy on the play store)
  4. rsync backup for Android – This will back up all your photos and data that isn’t part of your apps, if you don’t root but this is all you want to back up, this post might help you too!
  5. Llama – lets you set location profiles

(more…)

Cheap USB interface to connect Ham radios and other devices to the PC October 14, 2011

Posted by GuySoft in Crictor, diy, Electronics, Hamakor, ITU, linux, open source, wireless.
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12 comments

Ham radio PC interface

Hi all,
As promised in my last post, I have finally finished designing and building a cheap interface to connect ham radios or any other audio device that does not share audio common ground to a PC, including a PTT interface. Price should be around $17 or 60 NIS.  The control is done using a USB interface, so unlike most ham radio hardware that uses serial connections, this one is plug and play in modern PCs. The neat thing is that it uses them same commands as a RigBlaster. So this interface works out of the box with common ham radio programs like Echolink and Svxlink. The interface should also work with soundmodem which can be used for X.25 packet digital communications, without any extra hardware (I am still trying to get this to work). This interface could also be used to connect to other devices that don’t share a common ground. For example like phone lines.

Parts you will need

  1. TTL USB Serial interface – The main part is a simple CP2102 $4 controller that can be percussed from ebay. It simulates a serial device, meaning you can still work with older pieces of software with it. Note though you need to solder a cable from the RTS pin on the board, because normally they don’t come with a pre-made pin.
  2. Audio line isolation transformer – This can be easily salvaged from any old dial-up modem. That’s how I get mine, it seems to be much easier to get them off old modems than finding them in electronics shops, plus they are so easily identifiable (just make sure not to break the contacts when you take them out, happened to me twice). If you can’t find any old dial-up modems you can get it from ebay. (more…)

Echolink Node Native on Linux with Svxlink, and a Cheap PTT Hardware Interface August 8, 2011

Posted by GuySoft in Crictor, diy, Electronics, Hamakor, ITU, linux, open source, programming, wireless.
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10 comments

The Jerusalem Echolink Node

The Jerusalem Echolink Node (4Z7GAI-R)

Hey all,

I recently got my amateur HAM Radio license from the Israel ministry of communication. My call sign is 4Z7GAI.

I have been working on getting an Echolink node running on the Jerusalem repeater using Linux. Echolink is a closed proprietary software that lets you connect ham radios to one another and key them across the Internet. Luckily someone wrote a FOSS program called Svxlink, which lets you connect to the Echolink network on Linux., A remote radio control with an echolink server, svxlink-server and an Echolink graphical client, Qtel. I am going to explain in this post how to get svxlink compiled and working (compiling is the hard part). I will also giving out here an Ubuntu package for the lazy ones among you.

I will also add a small section on the physical connection to the radio, an old Icom IC-02AT from the 80s (around my age). (more…)

Connecting a programmable chip to a remote Controlled Car September 11, 2009

Posted by GuySoft in Crictor, Electronics, Hamakor, ITU, linux, open source, programming, Uncategorized, wireless.
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35 comments
Car and the controller breadboard

Car and the breadboard

Hey all,

I have been playing with electronics the last few days, and I thought I might show you the outcome.

I basically took a remote controlled car, and connected it to a 16F84 programmable chip, and now I can control the car using C code.

Although I am using a car in this guide, you should be able to close and open any kind of switch. Anything under 15 volts.

For people who have don’t feel like reading all this (and also for those who do), here is an action-packed video of the outcome:

After you saw that, here is how I did this.
(more…)

I am flying to the UN’s ITU Telecom in Bangkok August 23, 2008

Posted by GuySoft in Hamakor, open source, Uncategorized, wireless.
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3 comments

Hi all,

I am happy to announce that I am flying to represent my country in the ITU Telecom conference in Bangkok. I am going to be there between the 30th of August and 6th of September. I am going there as a part of the youth forum, which is a nice way because all expenses are taken care of.

The goal of the ITU is to take care of telecommunication standards and you can read about them in Wikipedia. However I am going to a conference  whose main objective is closing the digital gap in third world countries.

(more…)

How to build “cantenna”, a wave guide antenna out of a coffee can November 27, 2007

Posted by GuySoft in cantenna, Crictor, diy, Hamakor, linux, open source, wifi, wireless.
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23 comments

This is really a translation of a post I wrote in Hebrew out of Linmagazine.

Here is my own DIY guide to build a waveguide antenna. This antenna will dramatically boost your wireless connection to a specific direction, enabling connectivity to great distances.

(more…)

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