Feed SparkFun Electronics [copy] http://www.sparkfun.com/feeds/news has loading error: cURL error 22: The requested URL returned error: 405
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!
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...
OsmoCon 2018 CfP closes on 2018-05-30
One of the difficulties with OsmoCon2017 last year was that almost nobody submitted talks / discussions within the deadline, early enough to allow for proper planning.
This lad to the situation where the sysmocom team had to come up with a schedule/agenda on their own. Later on much after the CfP deadline,people then squeezed in talks, making the overall schedule too full.
It is up to you to avoid this situation again in 2018 at OsmoCon2018 by submitting your talk RIGHT NOW. We will be very strict regarding late submissions. So if you would like to shape the Agenda of OsmoCon 2018, this is your chance. Please use it.
We will...
openmoko.org archive down due to datacenter issues
Unfortunately, since about 11:30 am CEST on MAy 24, openmoko.org is down due to some power outage related issues at Hetzner, the hosting company at which openmoko.org has been hosting for more than a decade now.
The problem seems to have caused quite a lot of fall-out tom many servers (Hetzner is hosting some 200k machines, not sure how many affected, though), and Hetzner is anything but verbose when it comes to actually explaining what the issue is.
All they have published is https://www.hetzner-status.de/en.html#8842 - which is rather tight lipped about some power grid issues. But then, what do you have UPSs for if not for "a strong...
Mailing List hosting for FOSS Projects
Recently I've encountered several occasions in which a FOSS project would have been interested in some reliable, independent mailing list hosting for their project communication.
I was surprised how difficult it was to find anyone running such a service.
From the user / FOSS project point of view, the criteria that I would have are:
operated by some respected entity that is unlikely to turn hostile, discontinue the service or go out of business altogether
free of any type of advertisements (we all know how annoying those are)
cares about privacy, i.e. doesn't sell the subscriber lists or non-public archives
use FOSS to run the service itself, such as GNU...
CH340G - преобразователь USB - UART
CH340G
Микросхема CH340G - преобразователь интерфейсов USB - UART, выпускаемая китайской компанией WCH появилась на рынке сравнительно недавно, и очень быстро обрела широкую популярность. Из основных причин этого можно выделить:
низкую стоимость хорошую поддержку основными операционными системами - Linux, Windows (XP, 7, 8, 10) и Mac OS X работа с уровнями 3.3В и 5.0В микросхема требует минимум дополнительных компонентов и имеет удобный для пайки корпус SOIC-16В частности, эти преобразователи широко используются в китайских клонах ардуино.
CH340G создаёт виртуальный последовательный порт, эмулирующий все функции реального COM-порта (с полным контролем сигналов управления передачей данных...