Thermoelectric generators

Posted by & filed under Hardware.

Thermoelectric generators (also called thermogenerators) are devices which convert heat (temperature differences) directly into electrical energy, using a phenomenon called the “Seebeck effect” (or “thermoelectric effect”). Their typical efficiencies are around 5-10%. Older Seebeck-based devices used bimetallic junctions and were bulky while more recent devices use bismuth telluride (Bi2Te3) semiconductor p-n junctions and can have… Read more »

Vb.net – POSTing multipart/form-data

Posted by & filed under .Net, Programming.

Today I needed to be able to POST multipart/form-data to a form in order to submit for values as well as upload a file. All using HTTP POST. The first step was finding out that there does not seem to be a native way to post both form parameter and upload a file together. WebClient.UploadValues… Read more »

Troubleshooting Cacti’s Poller

Posted by & filed under Server Admin.

Today I had a Cacti server just stop polling out of the blue. It happened around the same time a coworker added a device to monitor though I’m not sure if this has anything to do with it. The box needed a reboot anyway, so I went ahead and gave it a reboot to see… Read more »

Pipe Viewer

Posted by & filed under BASH, Programming, Server Admin.

pv – Pipe Viewer – is a terminal-based tool for monitoring the progress of data through a pipeline. It can be inserted into any normal pipeline between two processes to give a visual indication of how quickly data is passing through, how long it has taken, how near to completion it is, and an estimate… Read more »

Updating OpenWRT packages on a USB stick

Posted by & filed under Uncategorized.

With opkg.conf configured with a usb destination I can install packages with: opkg -dest usb install <<package>> But sometimes, because files are not where the system expects the packages will not run once installed. A simple way to fix this is to run the following command after installing something to USB: !#/bin/sh echo “Making the… Read more »

Data Recovery: Finding VHD Files

Posted by & filed under Data Recovery, Server Admin.

SITUATION: Server had what appears to be a raid controller failure complete with it blowing away the data on the drives. The only backup available is corrupt. BEGINNINGS I began by mounting one of the drives on my local machine. Windows Disk Manager would not recognize the device as having a partition table. I then… Read more »

Flashing OpenWRT without a GUI

Posted by & filed under Uncategorized.

I have successfully completed my custom firmware build and have cross compiled it. I now have bin files ready for flashing. Since I did not opt to select the LuCi web interface that is packaged with OpenWRT, I deemed it wise to research my other options for reflashing the firmware, since once I flash my… Read more »

NHP Theme Options Framework

Posted by & filed under Programming, Web Development.

The NHP Theme Options Framework has an exhaustive list of features, which include… Simple, Easy to use Simple Theme Options Framework for WordPress, Leaving you to concentrate on creating beutiful WP Themes. Built In Field Types Contains many built in field types for easy use (all basic field types like text, checkbox, select, upload are… Read more »

gnokii — phone interface

Posted by & filed under Server Admin.

gnokii provides tools and a user space driver for use with mobile phones under various operating systems (most testing is done under Linux but also Solaris, *BSD family and MS Windows families are known to work). gnokii allows you to communicate with the phone over the serial cable connection, usb connection (support depends mostly on… Read more »

Kerbal Space Program

Posted by & filed under Gaming.

What is better than sitting in my backyard watching rockets blast off from KSC? Building my own of course. Ok maybe not AS cool as the real thing, but hey its interesting nonetheless. kerbalspaceprogram.com