Posts from 2011-07
Estimate the transform limited beam duration of a laser pulse from its spectral width in nm in Python
Here are a couple of Python functions to find the minimum duration of a gaussian pulse with a certain spectral FWHM (measured in nm) at a given central wavelength plus the...
9-pin D-type connector with the following pinout as viewed from the back of the unit (see p. 38 / 34 of the manual):
|2||Tx - Transmit (to computer)|
|3||Rx - Receive (from computer)|
Sometimes you have to use the middle mouse button, sometimes it's just convenient to do so. Either way, if you want to use it on a virtualised Linux machine on a Parallels 6 (or any other virtualisation software) you can't out-of-the box on a MacBook Pro as the touch pad...
Plug'n'Play on Linux
Plug the Prologix GPIB-USB Controller in on your Ubuntu 11.04 machine (most probably it will work on most older versions too) it directly shows up as a serial port via USB, such as
/dev/ttyUSB0. No additional drivers needed. Here is the output of
dmesg when you plug it...
Basically you cannot update the firmware of the modem; it is pushed by the CMTS. However there seem to be plenty of new firmwares out, such as the SB5120-126.96.36.199
- SB5120 Firmware on the Surfboard Hacker forum (requires registration): http://www.sbhacker.net/forum/index.php/forum/94-sb5120/
- Firmware download files: http://www.sbhacker.net/forum/index.php/files/category/9-sb5120-sbv5120-firmware/
- Hardware Modifications:
- Cruise Control Switch
To replace it, the "horn cover" (the airbag) has to come off.
- or SW-5919
Resources specific to this model:
- There is one by Helm Inc. 1-800-782-4356
- Heyns... http://www.malaysiaminilover.com/ford-ranger-repair-manual
You can search for used cars on craigslist, ebay or ask your friends...
brew install libusb
Usage in Xcode
Using libusb in an Xcode project is easy:
- Project Settings → Your Target → Build Phases → Link Binary with Libraries and add
- Project Settings → The Project → Header Search...
This power meter from Newport has a serial RS232 and a USB connection. This page tries to find out how it's possible to talk to the device via USB. For RS232 connection, look at the blog post Newport Power Meter 2935T-C – Serial Connection via Python.
USB Connection Info
Fuse4X is a port of FUSE - The Filesystem in Userspace to Mac OS X and allows you to mount all different kinds of remote / local filesystems on you Mac computer. A very popular 'filesystem' is sshfs, which allows you to mount a directory of a remote...
A quite new and powerful alternative to the TP-Link TL-WR1043ND running OpenWrt is the Buffalo WZR-HP-AG300H.
About the Hardware
The Buffalo WZR-HP-AG300H contains a powerful set of hardware, maybe the strongest for SOHO routers currently on the market:
|Atheros AR7161@680MHz (MIPS)||128MB||32MB||4+1 using an Atheros AR8316 Gigabit Ethernet switch||2x -...|
You can either download a *.dmg from http://octave.sourceforge.net/.
Or you can also install it via homebrew using:
brew install octave
I also wanted to install gnuplot including its AquaTerm terminal via homebrew (see Soeren's comment on http://slashusr.wordpress.com/2010/01/17/gnuplot-with-aquaterm-on-osx-snow-leopard/). But the build for AquaTerm failed :( :
cd /usr/local/Library/Formula/ wget...
You can get the latest driver for PL2303 based USB to serial adapters from the Prolific download page: http://www.prolific.com.tw/US/supportindex.aspx?id=7 (Login as GUEST / GUEST).
More information about the use of a PL-2303 chip based USB-RS232 adapter can be found on http://www.planet-rcs.de/article/mac_serial_port/....
To query a DNS entry for a domain name, here
www.example.com run this command on the Windows PowerShell:
And the opposite, get a hostname from an IP address: