Mads Chr. Olesen

4 years ago I posted a 4 year review of the Olimex LIME2. It seems that the lifetime of power supplies is approximately 4 years as now another power supply died, and this time also the SD-card was expiring. The LIME2 lives on however! It was a bit hard to notice, because the battery pack […]

Som med så mange andre huse fulgte der en Grundfos Alpha 2 cirkulationspumpe med da vi købte et hus. Den pumpede og pumpede, indtil den var blevet 13 år gammel: så begyndte den at flimre når den skulle starte op. Det er jo som sådan en rimelig hæderlig levetid, men også lidt mistænkeligt at det […]

Vi har en Aduro 1-2 brændeovn med Aduro-tronic, som vi generelt er rigtig glade for. Den har nu været i drift i 5 år, og har haft omkring 4500 optændinger. Generelt er designet rigtig fornuftigt, og med Aduro-tronic og Smart Response er det rigtig nemt at fyre korrekt. Den eneste anke må være at vi […]

I have a Philips Hue gateway at home that is connected to a number of Philips Hue lights, as well as some IKEA trådfri light bulbs, and a couple of OSRAM Lightify light strips. Most of the time the network works quite well, but some of the time a few of the lights become unreachable. […]

Vi har en fin moderne brændeovn derhjemme (en Aduro 1-2), som vi bruger ret intensivt til opvarmning af vores gamle stuehus. Et meget relevant spørgsmål er derfor: hvor meget bidrager sådan en moderne brændeovn til partikelforureningen i vores stue? Partikelforurening er små partikler af støv og sod, der bl.a. fremkommer ved afbrænding af fossile brændsler, […]

This is the considerations I did when building 1S80P 18650 battery packs, for a DIY powerwall. My design will go for 14 of these packs in series, for a nominal 48V system. I wanted a design that was: Very hard to short circuit, individual cell fuses, and generally as safe as possible Mechanically stable Balanced […]

Last week my A20-OLinuXino-LIME2 one board Linux computer quit working, with a power supply issue. I looked up when it was purchased, and realised it had been in 24/7 service for almost 4 years. I guess that is a good excuse to do a little review. It even turned out that it the board was fine, but the AC-DC […]

Vores Duka Passad 30 ventilator var begyndt at køre noget uregelmæssigt. Ventilatoren er ellers ret smart styret af fugtighed og IR-bevægelse, men vi bruger den kun fugtighedsstyret. Den var imidlertid begyndt ikke at kunne starte ordentligt: den reagerede fint på fugt, men motoren stoppede efter få sekunder, for straks derefter at starte igen. Der var […]

Some time ago we bought a nice used Ford 3000 tractor (3 cylinder diesel, Chief frontloader). It needed some work, and one of the items was a new wiring harness. After replacing all the wiring everything seemed to work fine, until one day all the instruments just died; this being a mechanical beast everything else kept […]

I have a fancy thermometer for my wood stove namely an Aduro Smart Response. The accompanying Android app basically shows a temperature graph, with guidelines as to whether the burning is optimal and when put in more wood. I have generally been content with the app: it is quite slow, but generally helps in more optimal burning. Recently however, the Android […]