Sudden voltage drop on MAX756

I got the MAX756 that I was waiting for from Futurlec. The idea was to implement the very same circuit that comes in the MAX756 datasheet. In my first try I got very strange results which I posted to ladyada forum hoping to get some advice on how to solve. Eventually I set up the circuit in another breadboard and got it working the way I expected or at least I thought so. ...

April 6, 2009

Firefox detecting wrong Java Plugin version on Windows.

First read this Mozillazine page In my case the problem was that some program overwrote the registry entry HKEY_LOCAL_MACHINE/SOFTWARE/JavaSoft/Java Runtime Environment/BrowserJavaVersion with the old value 1.6.0_01. When I set it back to 1.6.0_06 everything worked fine again. Now the addons window looks like before it showed Java Platform SE 6 U1 instead

December 12, 2008

dropbox not syncing files

Today I fixed my dropbox installation on mac os x . It was not updating (sending) files from the Mac to the Dropbox servers. In fact it was sending new files to dropbox servers but some old files that were supposed to be on dropbox account were not synchonized and I couldn’t get Dropbox to notice that, until today. I found this post and it seems that if you close dropbox, delete the ~/.dropbox directory and restart dropbox you’ll get the account linking screen again and dropbox will index everything and make sure that your local Dropbox directory match the online one. It took a while but all the files are safely transferred to Dropbox now.

October 20, 2008

Netbeans Paint Application

My first try with the Netbeans Paint Application tutorial didn’t work as expected. For some reason I got this stack trace when I tried to run it: java.lang.IllegalStateException: Module was supposed to be OK: StandardModule:org.netbeans.modules.projectuiapi jarFile: C:\Program Files\NetBeans 6.0\ide8\modules\org-netbeans-modules-projectuiapi.jar at org.netbeans.ModuleManager.maybeAddToEnableList(ModuleManager.java:1087) at org.netbeans.ModuleManager.maybeAddToEnableList(ModuleManager.java:1104) at org.netbeans.ModuleManager.maybeAddToEnableList(ModuleManager.java:1104) at org.netbeans.ModuleManager.simulateEnable(ModuleManager.java:1048) at org.netbeans.core.startup.ModuleList.installNew(ModuleList.java:379) at org.netbeans.core.startup.ModuleList.trigger(ModuleList.java:341) at org.netbeans.core.startup.ModuleSystem.restore(ModuleSystem.java:275) at org.netbeans.core.startup.Main.getModuleSystem(Main.java:171) at org.netbeans.core.startup.Main.start(Main.java:322) [catch] at org.netbeans.core.startup.TopThreadGroup.run(TopThreadGroup.java:110) at java.lang.Thread.run(Thread.java:619) I managed to solve it although I don’t really know the cause. ...

February 21, 2008

bash: clear: command not found

If your are getting “bash: clear: command not found” on you first install of cygwin you have to make sure that you include ncurses packages in your cygwin installation. clear.exe doesn’t come in the standard installation. You must include ncurses to get clear.exe in your system. If you are using bash you can use Ctrl-L and get the same result though. UPDATE: ncurses is a cygwin package in libs category in Utils category. You can install it using the the Cygwin Setup utility (just run setup.exe again). See screenshot below ...

September 26, 2007

avahi and .local domain troubleshooting

I got the “avahi-daemon disabled because there is a unicast .local domain” but I have no .local domain so I was a little bit confused. ~$ sudo /etc/init.d/avahi-daemon restart * Restarting Avahi mDNS/DNS-SD Daemon: avahi-daemon * avahi-daemon disabled because there is a unicast .local domain After a while I realized that my ISP is playing tricks with the DNS. It will never return a “DNS lookup failed”, it always resolve any dns name you pass to it. If the name is assigned it will return the proper IP but if the name is not assigned it will return the IP of the ISP portal. (Nice trick to get more page hits in their home page). ...

August 19, 2007

Subversion error: 503 Service unavailable

If you faced the following subversion message in windows: svn: PROPFIND request failed on '/repos/demosystemeic' svn: PROPFIND of '/repos/demosystemeic': 503 Service Unavailable (http://x.x.x.x) Probably the problem is caused because you are proxying your request via a proxy that doesn’t support HTTP methods like PROPFIND, etc. If you don’t really need the proxy to access the repository edit the file c:\Documents and Settings_username_\Application Data\Subversion\servers (Note: Subversion directory is hidden) and comment out the following items ...

March 7, 2007