Category Archives: HomeAutomation

Hydronic Underfloor Heating – Control

The underfloor heating supply temperature varies between 22 and 40 Celcius (72 – 104 Fahrenheit) the colder it is, the warmer the floor needs to be to heat the house. We adjust the supply temperature manually, if it is too … Continue reading

Posted in Heating, HomeAutomation, MySensors | Comments Off on Hydronic Underfloor Heating – Control

Hydronic Underfloor Heating – Supply side

Years ago, in our previous house, I described how I monitored the return temperatures from our underfloor heating system Raspberry PI and OneWire temperature sensors. Here I will describe the supply side of our current Hydronic Heating System. The next … Continue reading

Posted in Heating, HomeAutomation, MySensors | Comments Off on Hydronic Underfloor Heating – Supply side

Server Power supply DPS-750TB

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 on Server Power supply DPS-750TB

Server Power supply DPS-1200FB

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 on Server Power supply DPS-1200FB

Node Red

Først skal vi have fat Node-js version 8, check om du har den eller en ældre version med node -v https://nodejs.org/en/download/package-manager For de modige, og borderline-lazy, under ubuntu/debian: curl -sL https://deb.nodesource.com/setup_8.x | sudo -E bash – sudo apt-get install -y … Continue reading

Posted in HomeAutomation | Comments Off on Node Red

MySensors

Jeg har i lang tid kigget efter et frame-work til at konsolidere mine sensorer. I mange år har jeg brugt Raspberry Pi til at monitorere temperaturen i vores gulv-varme system som jeg har beskrevet i Raspberry Pi and Onewire Temperature … Continue reading

Posted in Arduino, HomeAutomation | Comments Off on MySensors

Fra Eagle til Kicad – PCB-design

Stort set alle de print-plader jeg har lavet i nyere tid har jeg designed i Eagle, som hidtil har udmærket sig ved at man kunne designe (ikke kommercielt) små print (8cm x 10 cm) i to-lag uden at skulle investere i … Continue reading

Posted in Hardware, HomeAutomation | Comments Off on Fra Eagle til Kicad – PCB-design

i2c og One-Wire

Når man ligesom jeg kun leger med embedded systemer og hardware i Januar/Februar er det en god ide at standardisere sig på nogle standarder der ikke udvikler sig. F.ex så er det meget frustrerende når den nye avr-gcc ikke kan … Continue reading

Posted in Hardware, HomeAutomation, Linux | Comments Off on i2c og One-Wire

Debian på PogoPlug – helt fra scratch

Updated to support Debian-9/Linux-4.12 November 2017 Begyndelsen af denne her POST er på sin vis helt overflødigt da Bodhi allerede har gjort arbejdet og stillet det færdige filsystem “Debian-3.17.0-kirkwood-tld-1-rootfs-bodhi.tar.bz2” tilrådighed lige her http://forum.doozan.com/read.php?2,12096. Brug den, og gå så videre til … Continue reading

Posted in HomeAutomation, Linux | Comments Off on Debian på PogoPlug – helt fra scratch

Debian on Kirkwood, fra USB-stick, SD-card, SATA-disk, FLASH, og NFS

Nu hvor vi har u-Boot bootloaderen på plads, er det på tide at vi får bootet noget. Der er nok at vælge imellem: Debian Linux Arch Linux Openwrt Linux NetBSD UNIX FreeBSD UNIX Jeg vælger Debian, mest fordi det er … Continue reading

Posted in HomeAutomation, Linux | Comments Off on Debian on Kirkwood, fra USB-stick, SD-card, SATA-disk, FLASH, og NFS