Posted by jpluimers on 2018/07/11
An interesting re-use: [WayBack] Transform Your ESP8266 Board into a USB to Serial Board Easily with Arduino Serial Bypass Sketch
Via: [WayBack] If you don’t have a USB to TTL board around, you can use an +ESP8266 board instead (or any other Arduino compatible boards with USB). – Jean-Luc Aufranc – Google+
–jeroen
Posted in Development, ESP8266, Hardware Development, IoT Internet of Things, Network-and-equipment, Power User | Leave a Comment »
Posted by jpluimers on 2018/07/06
A Wi-Fi enabled 1990 Macintosh Classic built with LEGO, powered by a Raspberry Pi Zero running docker and a 2.7″ e-paper display by EmbeddedArtists.
Cool stuff!
Source: [Archive.is] LEGO Macintosh classic with Wi-Fi and e‑paper display running docker
Via: [WayBack] This guy built a (kind of) working Lego Macintosh, and now you can too … | 9to5Mac
This should run well with a Classic Color Macintosh System 7 emulated on Raspberry Pi: [WayBack] On this tutorial I show you how to run Mac II OS color on your Raspberry PI, I have also included a compiled version for Windows. Running Mac OS 7 on Raspberry Pi with Color – Novaspirit
via:
ROM images: [WayBack] Index of /pub/software/ROM/Macintosh 68K
–jeroen
Posted in Apple, Classic Macintosh, Development, Hardware Development, History, Macintosh SE/30, Power User, Raspberry Pi | Leave a Comment »
Posted by jpluimers on 2018/07/06
Launch dates:
Now you only need a memory card and a camera module to make a nice “CCTV” system with plenty of choice. More details here:
Depending on what and when you record video, you might want to consider an IR capable camera. In Raspberry Pi land, they call them NOIR (which stands for No IR, meaning they leave out the IR filter which means they can record IR).
–jeroen
Posted in Development, Hardware Development, Power User, Raspberry Pi | Leave a Comment »
Posted by jpluimers on 2018/07/04
Very cool video based on these logic gates made from domino bricks:
The 4-bit calculator worked.
The 5-bit was set-up failed in part. That conclusion is at around 19:00.
A post mortem is at around 20:00: the machine was setup sizing it too small so the timing was too tight and didn’t work out.
–jeroen
Posted in Development, Hardware Development, History | Leave a Comment »
Posted by jpluimers on 2018/06/19
I never realised that Amazon Alexa has an open source account on GitHub: https://github.com/alexa
There are full instructions on getting a Java based Alexa Voice Service (AVS) – also used by Amazon Echo – to run on a Raspberri Pi (3 or better recommended, works on 2 as well) with this extra hardware:
Full instructions are at Raspberry Pi · alexa/alexa-avs-sample-app Wiki and a video is below: https://www.youtube.com/watch?v=baec1CbV6A0
I should find some time to try this out (:
–jeroen
Posted in Development, Hardware, Hardware Development, Hardware Interfacing, Software Development | Leave a Comment »
Posted by jpluimers on 2018/06/08
Be sure to read the comments at USB serial converters from FTDI are quite popular – Thomas Mueller (dummzeuch) – Google+ [WayBack] as it tells more about how to set genuine and fake FTDI chips apart (often before buying them, you cannot tell) and how to replace fake ones buy genuine ones.
Getting back to original means de-soldering fake chips, and soldering new genuine chips on the boards.
Fake chips:
Note that the workarounds for these fake chips mean you cannot use more recent chips.
Fake chips can cause you a lot of headaches – and time – sorting out communication problems: [WayBack] esptool-ck, esp8266, and FTDI Bug Hunting – vilimblog
Two years ago, this shoot-out (with results on github) had a great conclusion:
Buy either an adapter with a genuine FTDI chip, or one of the Silicon Labs CP2102 chips.
The FTDI chip is the only one attaining 3M baud rates.
Overview articles:
SiLabs chips seem to be the only without much trouble:
cp210x device, no matter the chip source:
I haven’t seen or recognized a fake CP210x chip yet, so my guess would be that these are generally fine no matter where you get them. One big advantage of those is the integrated voltage 3.3V regulator, which can save some space when rolling your own boards.
FTDI related:
ft232r_prog, then re-program using sudo ./ft232r_prog --new-pid 0x6001 as per (already archived original is gone) Unbrick FT232 counterfeit chip | Weird-Lab:
$ sudo apt-get install make gcc libftdi-dev
$ wget http://rtr.ca/ft232r/ft232r_prog-1.24.tar.gz
$ tar -zxvf ft232r_prog-1.24.tar.gz
$ cd ft232r_prog-1.24
$ make
$ sudo ./ft232r_prog —old-pid 0x000 —new-pid 0x6001
Genuine FTDI seems to be the easiest to find:
Prolific has similar issues, driver v3.4.25.218 still works with fake chips:
–jeroen
Related posts where I mentioned some of the trouble with FTDI chips:
Posted in *nix, Development, Hardware Development, Hardware Interfacing, Legacy Ports: COM, Linux, openSuSE, Power User, SuSE Linux | Leave a Comment »
Posted by jpluimers on 2018/06/04
Interesting howto: [WayBack] How to Control Your Air Conditioner with Raspberry Pi Board and ANAVI Infrared pHAT
via: [WayBack] Air conditioners’ remote control codes are a bit different from say your TV remote control, as they don’t just send one byte, but a bunch of bytes… – Jean-Luc Aufranc – Google+
–jeroen
Posted in *nix, Development, Hardware Development, Power User, Raspberry Pi | Leave a Comment »
Posted by jpluimers on 2018/05/28
DRAM Access Timing – now and then (then = during 6502 times)TL;DR: Modern DRAM ist faster old stuff, but not much. – Kristian Köhntopp – Google+
Source: [WayBack] DRAM Access Timing – now and then (then = during 6502 times) TL;DR: Modern DR…
Full article: [WayBack] dram_latency_then_and_now.md by [WayBack] Per Vognsen.
–jeroen
Posted in Development, Hardware Development, History, Software Development | Leave a Comment »
Posted by jpluimers on 2018/05/25
Reminder to self: since the [Archive] ARM Cortex A53 problems are fixed, check out if this is also fixed:
[WayBack] Hmm, latest Tumbleweed on Raspberry Pi 3 has an odd thing booting: Ansi terminal characters aren’t being processed any more. – Jeroen Wiert Pluimers – Google+
–jeroen
Related as a different Pi died after a sudden power down:
Posted in *nix, Development, Hardware Development, Linux, openSuSE, Power User, Raspberry Pi, SuSE Linux, Tumbleweed | Leave a Comment »
Posted by jpluimers on 2018/05/17
Cool video about basic electronic components explained:
It goes well with these posts:
Posted in Development, Hardware Development | Leave a Comment »
The Wiert Corner - irregular stream of stuff 