Before I proceed to manufacture the PCBs for the home automation I decided to invest in a solder plate and try a very small project: Temperature sensors that consists of a DS18B20 1-wire temperature sensor and a 2-pin SMD push connector.

First step was to make sure that the solder plate is actually grounded properly.

After that a layman’s temperature calibration run. Comparing the temperature using my multi-meter’s temperature probe and the internally measured value of the solder plate.

The PCBs were designed with eagle and manufactured by AISLER. They look good, were reasonably priced and came with a stencil.

On to solder paste application. The setup consists of a piece of wood with two pieces of PCB with the same thickness as the target PCB and the stencil taped in place after alignment. You can see in the image that the stencil is far from perfectly parallel to the hole line. The effect of slightly offsetting the solder paste will be visible soon.

Flipped the stencil over and put a drop of solder paste.

Using a metal scraper to apply.

The above mentioned error is visible, but I hope that it does not cause issues later and the amount of solder paste looks good. Next step is placing the parts.

Now let’s heat it up. Since I’m using the solder plate for the first time I did not take enough pictures to capture the whole reflow solder profile. I’ve set the temperatures manually and have waited using a timer. The relatively slow solder plate ensures the ramping is not too fast. The cooling after reaching maximum heat is a little bit slow, but will be improved once I’ve the ventilation in place that is definitely required for larger projects. The fan is already in place, so I’ll have to add an enclosure only.

Wait until it’s cooled.

Considering the fact that the connector does not match 100% with the footprint (the 8D process will show what went wrong) the solder joint is acceptable. The temperature sensor looks good to me. (Feedback welcome). After the first one was successful I finished the series by soldering the remaining 2 parts.

PCBs routed and sanded. I did a quick electrical test. With only 2 connections it could easily be done with the multi-meter. So the next step was to integrate the new sensor in the existing Loxone home automation system.

The sensor was successfully detected and provided a reasonable temperature.

In addition I’ve placed one of the sensors outside and it also show values that made sense.

I’ll order more PCBs and run a second batch and after that I’ll be out of excuses for producing the bigger PCBs for my light switches.

Upgraded to Fedora 35

Upgraded to Fedora 33.

This month’s come together will be held on 2020-03-11, 8pm not at our regular pub (see our mailing list for details).

I finally got around to looking into why my rsync automation fails with my new Lineage OS 17.1 device. The old instructions worked like charm. Sshd will start, but the shell user will receive a permission denied after successful authentication.

It turns out that sshd is unhappy with the file ownership or modes for /data. Now I didn’t want to mess with those nor did I want to move the ssh directory to another place so I cheated and told sshd to relax by adding:

StrictModes no

to sshd_config. Probably sshd dislikes that /data is owned by system and not shell nor root – allowing the system user to erase the ssh directory. Seems like one security concept is ruining another…

This month’s come together will be held on 2020-02-05, 8pm not at our regular pub (see our mailing list for details).

Upgraded to Fedora 31.

This month’s come together will be held on 2020-01-08, 8pm not at our regular pub (see our mailing list for details).

This month’s come together will be held on 2019-12-04, 8pm not at our regular pub (see our mailing list for details).

This month’s come together will be held on 2019-11-06, 8pm not at our regular pub (see our mailing list for details).

This month’s come together will be held on 2019-10-02, 8pm not at our regular pub (see our mailing list for details).

This month’s come together will be held on 2019-09-04, 8pm not at our regular pub (see our mailing list for details).

This month’s come together will be held on 2019-07-31, 8pm not at our regular pub (see our mailing list for details).

This month’s come together will be held on 2019-07-03, 8pm not at our regular pub (see our mailing list for details).

This month’s come together will be held on 2019-06-05, 8pm not at our regular pub (see our mailing list for details).

A hogshead

(abbreviated "Hhd", plural "Hhds") is a large cask of liquid (or, less often, of a food commodity). More specifically, it refers to a specified volume, measured in either imperial or US customary measures, primarily applied to alcoholic beverages, such as wine, ale, or cider. — Hogshead – Wikipedia

It must have been in 1999 when a group of four friends (including myself) started to think about buying a whisky cask. A whisky cask full of whisky of course. We agreed to buy the cask from the Springbank distillery in Campbeltown, Scotland, because it was, at that time (and probably still is), one of the few distilleries which were malting their barley themselves as well as performing their own bottling.

Our hogshead in 2003

The cask we bought was a hogshead which in our case meant 242 litres of 100 proof Springbank whisky, distilled in November 2000 (see picture). The hogshead we went with was a Sherry refill cask and our whisky was the second whisky in this Sherry cask (that is what the B stands for in the picture). The price included the whisky and the cask itself and 10 years in Springbank’s warehouse. One important information at this point, which we ignored or which we did not care, is that the whisky in the cask in the warehouse is not yet taxed. Once you want to get the whisky out of the warehouse and bottled it will be taxed. A lot.

Cask Owners Privilege Card

Now that we owned a whisky cask in Scotland we made plans to visit it (of course). The first visit was in July 2003 from which we still have the first picture of our cask as well as some notes from the stillman.

Stillman notes 2003

In addition to the visit and the picture we were able to get one sample bottle of our whisky and for the first time we were able to taste it. At that time it still tasted very alcoholic and was not as smooth as it is now. At that time our whisky has been less than three years in its cask and has not had enough time to mature. Having matured less than three years our whisky could not even be called a scotch yet.

First bottles (left:2003 right:2007)

Our next visit to the Springbank distillery was in 2007. We did a distillery tour and were also able to visit our cask again. We were also able to get another sample bottle from our whisky.

In 2008 we ordered the first 8 bottles of our whisky and they soon arrived:

2008 8 bottles

In 2010 the whisky had its 10 years to mature in the cask and we started discussions with the distillery to get one part of our whisky bottled. The minimum number of bottles to start the bottling is 120. The remaining whisky should stay in the cask for 5 more years. After selecting a label and how the bottles would be transported to us, 120 bottles of single cask Springbank cask strength arrived at my door in March 2011.

After 5 more years in the warehouse we decided to bottle the remaining whisky and in April 2016 156 bottles of our remaining single cask Springbank in cask strength were shipped. After 10 years the whisky had 54.8% vol alcohol and after 15 years it went down to 51.8% vol alcohol.

The delivery of the last bottles included the hogshead which is still in front of my house. Standing in the rain in front of my house the original labelling started to appear and it seems to origin from Dublin.

No 121
L.G.&Sons Ltd
u 747
CAP. 250 CONT 253
CELEBRATION CREAM
NE-42
DUBLIN
N 267

The whisky we got is really good, especially the bottling after 15 years. Being cask strength means you usually have to add a few drops of water.

Overall it was a really fun experience, especially to how many different people you have to talk to get everything shipped to our place. I am happy that I was asked to join this group in 1999 and want to thank everyone involved.

This month’s come together will be held on 2019-05-08, 8pm not at our regular pub (see our mailing list for details).