I recently got a MacBook Pro and wanted to use it's Time Machine functionality. The only large hard drive I had was in my desktop computer dual booting Windows 7 and Ubuntu - so I decided to add an AFP server to Ubuntu to make it act like a Time Machine server.
I originally tried using NFS and Samba, but the setup procedure turned out to be too complicated and neither of them worked out in the end, for some reason (but I'm sure it could be done). I stumbled across netatalk which includes an AFP (apple file sharing protocol) server. I then followed the tutorial here, to set it up.
However, some things to note:
The tutorial is a year old and the latest version of netatalk has not been uploaded to the ubuntu repositories, so you need to get the latest sources from the netatalk website and compile them yourself (the latest version has Time Machine support).
You can follow the tutorial through, like I did, and just update to the latest netatalk when you've completed the tutorial. Simply download the latest netatalk sources, do a ./configure, make, sudo make install and reconfigure the netatalk configuration files. Make sure to add the "tm" option to the configuration files. I posted a comment on that site, so just search the page for the user "solarwind" to see my comment about that.
Thursday, December 17, 2009
Friday, November 20, 2009
Electronics Supplier in Toronto
creatroninc.com
This store, located on 255 College st., sells Arduinos for $30 as well as a whole bunch of other stuff you'd expect to find at Sparkfun.
This store, located on 255 College st., sells Arduinos for $30 as well as a whole bunch of other stuff you'd expect to find at Sparkfun.
Friday, September 11, 2009
Hamachi is great!
If you're into playing games online, with people you know, the best way to do it is through a VPN such as Hamachi. It took me only a few minutes to download and install Hamachi. After that, I created a network and a password and created a little VPN consisting of myself and a few other (trusted) people.
Hamachi simulates a physical LAN very closely, so every game I tried worked on the LAN setting very reliably: Red Alert 3, Counter Strike Source, and many more.
Hamachi simulates a physical LAN very closely, so every game I tried worked on the LAN setting very reliably: Red Alert 3, Counter Strike Source, and many more.
Friday, August 28, 2009
The Pirate Bay Sold - Alternatives
The Pirate Bay has been sold. Here are some alternative sites: http://torrentfreak.com/25-great-pirate-bay-alternatives-090822/
BTJunkie, Demonoid and EZTV are the best.
BTJunkie, Demonoid and EZTV are the best.
Saturday, August 22, 2009
Bicycle Speedometer Project
Here's a new project I've been thinking about building: a bicycle speedometer.
At it's core, it's just a simple reed switch hooked up to a PIC microcontroller's CCP module (in capture mode) which measures the period of the turning of the wheel. Based on the period data, the microcontroller then calculates the speed and displays the information to the user on an LCD screen. Now, to dive in deeper...
This project can, of course, remain as simple as a mere speed measuring device or can be expanded into a full bicycle computer which maintains trip logs (time, distance, speed, keeping track of rest breaks), control headlights based on ambient light and so on.
The main speed measuring module consists of a reed switch mounted on one of the front forks. A strong magnet shall be placed on one (or more) of the spokes. Every time the wheel turns, the magnet will pass the reed switch and close the circuit, sending a signal to the microcontroller. The microcontroller is then interrupted by the event and the CCP module then measures the period. To compute the speed of the bicycle, only the circumference/diameter of the wheel and the period must be known. Although only one magnet is required, more can be placed to allow for greater accuracy. On the PIC's side, an appropriate external crystal shall be used with the CCP's timer to allow for millisecond timing. With the appropriate crystal, the CCP can then measure the period (in milliseconds) of the wheel to produce very accurate speed readings. Readings can be presented to the user every 1 second, for example. The LCD can be of HD44780 type or this or this or one of the graphic LCDs at Futurlec. The LCD should be small and readable yet consume as little power as possible. The microcontroller itself will be in sleep mode most of the time to conserve power.
A real time clock and SD card (via SPI interface) can also be added to the project to allow for data logging and to add a simple real time clock. The RTC will maintain time via a "backup battery" and the SD card would be written to every now and then.
The entire computer could be powered by batteries. But since the computer consumes less than a few mA at most, a solar panel is also possible. Or it would also be possible to use the energy generated by the bicycle and store it in capacitors.
As for the core of the computer, any PIC would do for such a relatively computationally non-intensive job. However, I was thinking of using the dsPIC33FJ128GP802 :)
At it's core, it's just a simple reed switch hooked up to a PIC microcontroller's CCP module (in capture mode) which measures the period of the turning of the wheel. Based on the period data, the microcontroller then calculates the speed and displays the information to the user on an LCD screen. Now, to dive in deeper...
This project can, of course, remain as simple as a mere speed measuring device or can be expanded into a full bicycle computer which maintains trip logs (time, distance, speed, keeping track of rest breaks), control headlights based on ambient light and so on.
The main speed measuring module consists of a reed switch mounted on one of the front forks. A strong magnet shall be placed on one (or more) of the spokes. Every time the wheel turns, the magnet will pass the reed switch and close the circuit, sending a signal to the microcontroller. The microcontroller is then interrupted by the event and the CCP module then measures the period. To compute the speed of the bicycle, only the circumference/diameter of the wheel and the period must be known. Although only one magnet is required, more can be placed to allow for greater accuracy. On the PIC's side, an appropriate external crystal shall be used with the CCP's timer to allow for millisecond timing. With the appropriate crystal, the CCP can then measure the period (in milliseconds) of the wheel to produce very accurate speed readings. Readings can be presented to the user every 1 second, for example. The LCD can be of HD44780 type or this or this or one of the graphic LCDs at Futurlec. The LCD should be small and readable yet consume as little power as possible. The microcontroller itself will be in sleep mode most of the time to conserve power.
A real time clock and SD card (via SPI interface) can also be added to the project to allow for data logging and to add a simple real time clock. The RTC will maintain time via a "backup battery" and the SD card would be written to every now and then.
The entire computer could be powered by batteries. But since the computer consumes less than a few mA at most, a solar panel is also possible. Or it would also be possible to use the energy generated by the bicycle and store it in capacitors.
As for the core of the computer, any PIC would do for such a relatively computationally non-intensive job. However, I was thinking of using the dsPIC33FJ128GP802 :)
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