Feed SparkFun Electronics [copy] http://www.sparkfun.com/feeds/news has loading error: cURL error 22: The requested URL returned error: 405
Feed The RFID Weblog [copy] http://www.rfid-weblog.com/index.rss has loading error: cURL error 22: The requested URL returned error: 404 Not Found
Feed tqfp.org [copy] http://tqfp.org/rss/ has loading error: A feed could not be found at `http://tqfp.org/rss/`; the status code is `200` and content-type is `text/html; charset=utf-8`
How we run CI for our open source silicon projects
...
We will run Soldering workshop for RVPC – the Retro Style RISC-V computer on FOSDEM 2026
FOSDEM 2026 will take place in Brussels on 31 January and 1 February 2026. It is the largest European event dedicated to Open Source Hardware and Free/Libre Open Source Software, bringing together thousands of developers from around the world each year. Our proposal for a Soldering Workshop at FOSDEM has been approved. On Saturday, from […]
olimex
The stack circuitry of the Intel 8087 floating point chip, reverse-engineered
Early microprocessors were very slow when operating with floating-point numbers. But in 1980, Intel introduced the 8087 floating-point coprocessor, performing floating-point operations up to 100 times faster. This was a huge benefit for IBM PC applications such as AutoCAD, spreadsheets, and flight simulators. The 8087 was so effective that today's computers still use a floating-point system based on the 8087.1
The 8087 was an extremely complex chip for its time, containing somewhere between 40,000 and 75,000 transistors, depending on the source.2 To explore how the 8087 works, I opened up a chip and took numerous photos of the silicon die with a microscope. Around the edges of the die, you...
The DC-ROMA II is the fastest RISC-V laptop and is odd
The DC-ROMA II is the fastest RISC-V laptop and is odd
Inside this Framework 13 laptop is a special mainboard developed by DeepComputing in collaboration with Framework. It has an 8-core RISC-V processor, the ESWIN 7702X—not your typical AMD, Intel, or even Arm SoC. The full laptop version I tested costs $1119 and gets you about the performance of a Raspberry Pi.
A Pi 4—the one that came out in 2019.
Jeff Geerling December 8, 2025New Open Source Hardware board with ESP32-C6 WiFi 6, Bluetooth 5 LE, Zigbee, Thread / Matter and LiPo UPS
The ESP32-C6-Devkit-Lipo is a evaluation board built around the ESP32-C6-MINI-1-N4 module from Espressif with 4MB Flash and 512KB RAM, designed to bring WiFi6 wireless connectivity, ample memory, and robust control features into one compact, breadboard friendly versatile package. All available signals are are on two 0.1″ step headers spaced at 0.9″ to may plug directly […]
olimex
Кустарные вакуумные триоды Клода Пайяра. Часть 4. Вакуумные насосы
Мы уже познакомились с Клодом Пайяром — французским радиолюбителем, в бытность, редактором журнала Radio-REF, энтузиастом-электровакуумщиком, воссоздавшим в своей мастерской кустарное производство практических триодов ТМ [1] (первых, 1920-х годов, промышленных «жёстких» — с высоким вакуумом, электронных ламп), и рассмотрели его самодельное огневое оснащение (Часть 1), установку для контактной сварки и технологическую печь (Часть 2), ламповую установку ТВЧ для дегазации электродов ламп при откачке (Часть 3). Сегодня мы взглянем на высоковакуумную установку Клода, самодельную, как и всё его оборудование.
Читать далееПервые отечественные электронные лифты. УПЛ-10
Приветствую всех!
Давным-давно, ещё в советскую эпоху, большинство лифтов были релейными. Но уже в восьмидесятые начали появляться электронные станции. Конечно, до современных микропроцессорных систем им было очень и очень далеко, а построены они были на дискретной логике. Тем интереснее взглянуть на устройство таких блоков.
Так получилось, что ко мне в руки попала одна из таких станций управления. Так что сейчас у нас есть возможность посмотреть, как она устроена, и попробовать разобраться, как она работает. Традиционно будет много интересного.
25 этажThe RAM Shortage Comes for Us All
The RAM Shortage Comes for Us All
Memory price inflation comes for us all, and if you're not affected yet, just wait.
I was building a new PC last month using some parts I had bought earlier this year. The 64 Gigabyte T-Create DDR5 memory kit I used cost $209 then. Today? The same kit costs $650!
Jeff Geerling December 4, 2025New Open Source Hardware board MOD-ESP32-C5 adds dual band WiFi6, Bluetooth 5 LE and Zigbee, Thread-Matter connectivity to any development board with UEXT connector
MOD-ESP32-C5 is compact 40x20mm development board which can be plugged to any development board with UEXT connector and adds dual band 2.4/5Ghz WiFi6 connectivity via Espressif ESP-HOSTED SDK. MOD-ESP32-C5 is available at olimex.com for only EUR 5.95
olimex
Why doesn't Apple make a standalone Touch ID?
Why doesn't Apple make a standalone Touch ID?
I finally upgraded to a mechanical keyboard. But because Apple's so protective of their Touch ID hardware, there aren't any mechanical keyboards with that feature built in.
But there is a way to hack it. It's incredibly wasteful, and takes a bit more patience than I think most people have, but you basically take an Apple Magic Keyboard with Touch ID, rip out the Touch ID, and install it in a 3D printed box, along with the keyboard's logic board.
...