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IBM 5161 Expansion Chassis Extender and Receiver Cards
Today is an exciting day for people who collect vintage IBM PCs and XTs! IBM had a somewhat obscure add-on product called the 5161 expansion chassis, which looked exactly like an IBM PC but with a difference case badge. It allowed customers to add two additional full-height drives (typically 10MB MFM hard drives) and 7 usable expansion slots (excluding the one used for the MFM disk controller). And yes, with those full-height hard drives, it sounded like a jet engine.
Connecting the expansion chassis to the host PC were two expansion cards. One, the extender, was placed in the host PC....
Free Stuff, June and July 2018
junio 2018
El destinario de Cosas Gratis para junio es Gabriel Martín Miguel de Salamanca, España. Él quiere hacer una plataforma de radio asequible a los nuevos radioaficionados para acercarles las nuevas formas de hacer radio. Él tiene un grupo de Facebook sobre SDR para usuarios, programadores y radioficionados en español, tanto en España como en latinoamerica, aqui: facebook.com/groups
July 2018CTRL-H Hackerspace of Portland, Oregon asked us for a HackRF One. They plan to use it for SDR workshops and their Electronics Lab Radio Closet, where they'll be capturing and hosting as much data as possible through SDR. It looks like they...
Still alive, just not blogging
It's been months without any update to this blog, and I feel sad about that. Nothing particular has happened to me, everything is proceeding as usual.
At the Osmocom project we've been making great progress on a variety of fronts, including
3GPP LCLS (Local Call, Local Switch)
Inter-BSC hand-over in osmo-bsc
load Based hand-over in osmo-bsc
reintroducing SCCPlite compatibility to the new BSC code in osmo-bsc / libosmo-sigtran
finishing the first release of the SIMtrace2 firmware
extending test coverage on all fronts, particularly in our TTCN-3 test suites
tons of fixes to the osmo-bts measurement processing / reporting
higher precision time of arrival reporting in osmo-bts
migrating osmocom.org services to new,...
Free Stuff, May 2018
We sent Oleksandr Tytko a HackRF One. He is studying at Lyceum No 1, Chernivtsi, Ukraine. He and his classmates plan to use the HackRF One to learn about SDR and to write and test their own code. He is also very enthusiastic about starting an open source project studying the influence of radio frequencies on plants and people. He sent us a picture of the greenhouse in his local Botanic Garden where he plans to do the research:
Dan Groeneveld is an instructor at Northland Pioneer College in Show Low, Arizona. He is going to be teaching net security and...
Free Stuff, April 2018
April's Free Stuff recipient is EFF (The Electronic Frontier Foundation). EFF is a nonprofit organization that defends civil liberties in the digital world. From their website: Founded in 1990, EFF champions user privacy, free expression, and innovation through impact litigation, policy analysis, grassroots activism, and technology development. We work to ensure that rights and freedoms are enhanced and protected as our use of technology grows.
Andrés Arrieta, Technology Projects Manager, has asked for a HackRF One because: At EFF we are looking how technologies impact our rights in our daily lives. Research has already shown many vulnerabilities in the standards...
Free Stuff, March 2018
The Free Stuff recipient for March is Jan van Katwijk, a hobby programmer from the Netherlands. He plans to use his new HackRF One to finish his work on DAB software by providing a library for HackRF, then for experimenting with wideband receiving issues. His current developments include software support for ACARS and ADS-B decoding.sdfsdfdsf A full overview of his work is available here and here.
If you'd like to submit your project idea for consideration to receive free hardware from Great Scott Gadgets, please visit the Free Stuff page and send us a message!
www.apertus.org: AXIOM Team Talk Volume 14.1 - Moving Facilities, Updates and GSoC Projects
https://invidious.privacyredirect.com/watch?v=z4KE4gE_jB0
Moving Offices
For the last two years the AXIOM headquarters has cohabited from the modest Amescon facilities in the 15th District of Vienna, Austria. This is where most of the electronics manufacturing for the AXIOM Betas has taken place. This spring we began the process of moving to a new, bigger and better shared office called Factory Hub Vienna - this was quite a challenge as the pick and place machine was built and assembled inside the old office and so it wasn’t clear whether or not the machine would fit through the doors… it didn’t. In the first Team Talk...
Re-launching openmoko USB Product ID and Ethernet OUI registry
Some time after Openmoko went out of business, they made available their USB Vendor IDs and IEEE OUI (Ethernet MAC address prefix) available to Open Source Hardware / FOSS projects.
After maintaining that for some years myself, I was unable to find time to continue the work and I had handed it over some time ago to two volunteers. However, as things go, those volunteers also stopped to respond to PID / OUI requests, and we're now launching the third attempt of continuing this service.
As the openmoko.org wiki will soon be moved into an archive of static web pages only, we're also moving the list of...
Калькулятор скорости UART для AVR
Калькулятор скорости UART для AVR-микроконтроллеров. По умолчанию отображаются таблицы для основных популярных частот процессора и скоростей обмена. При желании эти параметры можно изменить.
Значения в таблицах подсвечены разными цветами в зависимости от отклонения реальной частоты передачи от желаемой: менее 0.1%, менее 0.5%, менее 1%, менее 2%, менее 3%, более 3%.
Bit Rate:
Clock Freq, MHz:
fCPU = 1 MHzBit RateU2Xn = 0U2Xn = 1UBRR(dec)UBRR
(hex)Actual
Bit RateErrorUBRR
(dec)UBRR
(hex)Actual
Bit RateError3002070x00CF300.480.2%4160x01A0299.76-0.1%6001030x0067600.960.2%2070x00CF600.960.2%900680x0044905.80.6%1380x008A899.28-0.1%1200510x00331201.920.2%1030x00671201.920.2%1800340x00221785.71-0.8%680x00441811.590.6%2400250x00192403.850.2%510x00332403.850.2%3600160x00103676.472.1%340x00223571.43-0.8%4800120x000C4807.690.2%250x00194807.690.2%960060x00068928.57-7%120x000C9615.380.2%14.4 K30x000315.625 K8.5%80x000813.889 K-3.5%19.2 K20x000220.833 K8.5%60x000617.857 K-7%28.8 K10x000131.25 K8.5%30x000331.25 K8.5%33.6 K10x000131.25 K-7%30x000331.25 K-7%38.4 K10x000131.25...
A Vacuum Tube ROM?
Is such a thing possible?
Turns out it is, and it’s called a Monoscope. I recently got a Raytheon CK1414 Monoscope with a good getter and a working filament–naturally, I decided to fire it up.
The Monoscope is essentially a CRT; it has an electron gun and deflection plates which create a thin electron beam and points it towards the screen. Unlike a CRT, there is no phosphorescent coating on the end of the glass envelope. Instead, there is a metal plate that has an alphanumeric character set printed on it (an 8×8 array for 64 possible characters). There is also a...