Author Archives: peter

10 Gbit Ethernet interconnecting my servers.

Posted on January 19, 2021 by peter

Emulex OCe10102 The Emulex 10Gb-Ethernet-adapters are 8 lane PCI-Express, but unfortunately they are a little too wide so they need to go into a 16 lane slot, or some surgery is needed, this is/was another good reason to try another … Continue reading →

Posted in FreeBSD, internet, Linux | Comments Off

Dad was it you who brought the internet to Denmark ?

Posted on December 23, 2020 by peter

I did not bring the internet to Denmark, but I was one of the first to interconnect our computers at Aalborg University using internet protocols, and I was involved in DKUUG/DKnet which were the front-runners for open systems and networks. … Continue reading →

Posted in internet | Comments Off

Server Power supply DPS-750TB

Posted on July 7, 2020 by peter

and how to get PMBus access from f.ex. a Raspberry Pi My favorite power-supply for almost anything is the Server PSU for Dell R510/R710/R910. It is a 750w 12v 60amp supply with 80-plus-gold standard, you can get them for $10-20 … Continue reading →

Posted in Arduino, Camper, Embedded, Hardware, HomeAutomation, Linux, MySensors, Raspberry Pi | Comments Off

Server Power supply DPS-1200FB

Posted on July 6, 2020 by peter

Among hackers the DPS-1200FB seem to be the most popular choice for a powerfull Server PowerSupply 12volt 100Amp for less than $20 delivered. There is a lot of information available for this PSU. So if you want to really get … Continue reading →

Posted in Arduino, Camper, Embedded, Hardware, HomeAutomation, Linux, MySensors, Raspberry Pi | Comments Off

PlatformIO and Marlin – and how to have separate config files, for different 3Dprinter while sharing the same code.

Posted on April 27, 2020 by peter

I am using Marlin 2.0 to control my 3D printers, Marlin 2.0 can still be compiled and installed from the Arduino-IDE,although I use the supplied Makefile. To take advantage of other processors you have to use PlatformIO. In this article … Continue reading →

Posted in 3D printer, Arduino | Comments Off

Corona and DIY statistics

Posted on April 2, 2020 by peter

It is hard to know who to believe these days. Too many headlines with too little information that is relevant to me. But you do not have to rely on CNN or Danmarks Radio to digest the information for you, … Continue reading →

Posted in COVID-19 | Comments Off

Marlin 2.0 using Makefile (and reclaiming io-pins on atmega1284p based mainboard)

Posted on March 20, 2020 by peter

I am using Marlin 2.0 to control my 3D printers, I like to be in full control so I compile my own firmware, adding my own tweaks. Most people probably use the Arduino IDE to compile and install the firmware … Continue reading →

Posted in 3D printer, Arduino | Comments Off

MySensors Debug print @ 5.3Mbit/sec freeing Hardware Serial Port

Posted on November 13, 2019 by peter

MySensors provides a lot of useful debugging information on the serial port when MY_DEBUG is defined, I need to use the HardwareSerial for another purpose. but would still like to have the option to see the debug prints. which could … Continue reading →

Posted in Arduino, Embedded, MySensors | 1 Comment

Wifi – bandwidth throttled for guest – part2

Posted on January 18, 2019 by peter

To give internet access to the friends of our Bandits who visit us, I have set up a password free WiFi guest network. This network is made available on all our routers, but bandwidth is throttled to 2 Megabit Download, … Continue reading →

Posted in internet, Linux | Comments Off

Wifi – Multiple Access points with roaming – part1

Posted on December 14, 2018 by peter

Todays subject is to set up a number of Wifi access points at our home, using a single SSID/password, and provide seamless roaming between them, so that f.ex. a skype-call would not be interupted while moving around, ie. handover to … Continue reading →