Ok so not very Linux related, but it is running OSS and is a nice little toy for those of us who have been playing with Arduino etc.
Arm DSO DS-203 based pocket oscilloscope, £80 delivered....Grab yourself a little Xmas present.
http://www.seeedstudio.com/wiki/DSO_Quad
Oscilloscope, Logic analyser, SigGen (with freeform wave generation mode) and Spectrum Analyser. Spare memory slots for additional applications.
Latest FPGA image is loaded so it is now capable of 72Ms/s in dual channel or 144ms/s in single channel. 72Ms/s still isn't lots though. In real terms it is usable up to 20Mhz or so so ideal for Arduino projects.
Does all the usual, X-Y mode, Math functions, extended trigger functions.
Measurement range up to 80vpp on a 1x probe.
Open Source software, Currently a fork is loaded of the factory image which has a vastly improved UI over the screenshots you see on the internet. It's easy to revert though
https://github.com/gabonator/DS203
Comes complete with 2 switchable 1x/10x Probes, soft carry pouch and the usb/charging lead. Hardly used and in as new condition, when I tinker I'm bench based now and I have a really good Tektronics scope for that.
It's not by any means a serious reference instrument. I'll run it up against my Tek and get it as close to calibrated as it is possible to get these before it is posted. It's a great little indicator tool though. The software is getting better and better.