A smart­watch I would buy

After read­ing an arti­cle about smart watch­es, I tried to come up with a spec of a smart watch I would buy:

  • It needs to look like a nor­mal watch (I wear a stain­less steel ana­log one, about two thumbs wide with the strap being one thumb wide) and needs to be thin (or at least give the impres­sion it is thin, even if it is not).
  • It needs to be an exten­sion to my smart­phone, but being able to dis­play date and time with­out it.
  • It needs to have an open pro­to­col, so that peo­ple can write smart­phone apps which are able to dis­play any­thing they want.
  • It would be nice if the vendor-supplied app would dis­play incom­ing calls/SMS and at least cal­en­dar noti­fi­ca­tions (addi­tion­al noti­fi­ca­tions should be con­fig­urable, I do not want to see “you are roam­ing now” mes­sages, but email mes­sages could be nice when you are wait­ing for an impor­tant one) from the smart­phone. I am not sure how many columns/rows for char­ac­ters there need to be or if it shall be a pixel-display with a spe­cif­ic min­i­mum amount of DPI.
  • There needs to be at least one easy to use by intend but hard to use by mis­take but­ton which switch­es back to the date/time dis­play (and/or switch­es between sev­er­al default dis­plays like weath­er, date/time, agen­da… when con­nect­ed to the smart­phone – again, ide­al­ly this is con­fig­urable in the app). Bonus points for an addi­tion­al con­text sen­si­tive but­ton (e.g. “snooze 5 min­utes” or “dis­miss” for cal­en­dar noti­fi­ca­tions, ide­al­ly this can be con­fig­ured in the app).
  • The bat­tery needs to last long and be easy to replace (like with my cur­rent watch, so it needs to last years). While I would pre­fer a recharge­able way of han­dling this, the cur­rent tech­nol­o­gy is clum­sy (stan­dard­ized con­nec­tors like micro-USB to charge are too big… non-standard con­nec­tors are not an option) and does not last enough (I would be OK if one charge would last near­ly a year).
  • I do not need col­ors, but a good con­trast even in full sun­light is manda­to­ry.
  • Med­ical or life-style sen­sors (com­pass, gyro­scope, blood pres­sure, accelerom­e­ters, radi­a­tion, air qual­i­ty, …) are not nec­es­sary, but as long as they come for free (read: do not make the watch much thick­er), I would not mind.
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The local BBQ style: “Schwenken”

When­ev­er I show our local (= my region) BBQ gear to “out­siders” (all peo­ple which did not grow up in our region and nev­er went to a local BBQ), peo­ple are impressed. So I thought, let me export this great inven­tion out in the world. Maybe some­one out there is inter­est­ed enough to build the sim­ple solu­tion which has a lot of fea­tures.

The Schwenker

As a pic­ture tells more than a lot of words, let me first let you look at it.

The typical BBQ device in my region.

The BBQ device which I show you here is called a “Schwenker”. The oper­a­tion of grilling some­thing on a Schwenker is called “schwenken” (the direct trans­la­tion of schwenken is “swing­ing around” or “to swing”). As you may guess, this is because you swing around the meat (or veg­eta­bles or fish or cake (I have read that one win­ner of the nation­al BBQ-competition had a Black-Forrest-Cherry-cake on the grill) or what­ev­er peo­ple may want to put there) over the fire. The meat which is very often pre­pared on the Schwenker is called “Schwenker” (we are effi­cient with words in our region…). Basi­cal­ly this is the meat of a pork which relaxed a day or two in oil, onions and papri­ka (add pep­per, salt and herbs to your own lik­ing, oth­er vari­a­tions are with gar­lic and green herbs). While the Schwenker is on the Schwenker, you can put a lit­tle bit of beer on it to add a lit­tle bit of taste (this is option­al). It exists a small Wikipedia entry about Schwenker, there you can even read about oth­er mean­ings of the words Schwenker/Schwenken (all relat­ed to what you see/read here).


So, how to build one? Its easy. Take a met­al plate (best is a tri­an­gle where the edges are bend a lit­tle bit), attach 3 met­al poles (they need to be strong enough to car­ry the grill and the meat) to it in a way that you can attach a met­al roll between them (like a hoist, it is there to lift the grill) and that the met­al poles form a tri­pod. You get bonus points if the roll can be rotat­ed where it is attached, but is is enough if it is aligned with one of the poles. Now take a grill (round) and attach 3 lit­tle chains to it (in the pic­ture above, those chains are not so lit­tle, but it is a big grill, you can feed at least 10 peo­ple at once) so that the grill is lev­eled when you attach those 3 chains to a sin­gle point. The 3 chains need to be attached to a long chain, and this chain needs to put on the roll which is attached on the tri­pod. Now attach a hook on one of poles in a con­ve­nient posi­tion (if you stand in front of the tri­pod you need to be able to access the hook eas­i­ly) and attach the chain which is con­nect­ed to the grill and the roll. It looks a lit­tle bit more high-tech if you use a winch instead of a hook, but then you need to use a met­al rope instead of a chain.


  • vari­able heat inten­si­ty (lift or low­er the grill by attach­ing a dif­fer­ent part of the chain to the hook)
  • ecologic/equal heat­ing (swing and/or rotate the grill over the fire, you can cov­er a lot of grill area with a small fire, all meat gets about the same heat­ing with­out the need to move the meat itself on the grill a lot)
  • keep some meat hot while eat­ing (lift or low­er the grill)
  • food safe­ty (you need to cre­ate more fire but you already have some meat on the grill: move the tri­pod to the side; you want to move the fire in the fire­place: the chain is not as hot as the grill, use it to move the grill a lit­tle bit to the side while mov­ing the fire in the fire­place)

Tips & Tricks

The fire­place in the pic­ture is a part of the bar­rel of a wash­ing machine (some­where between a half and a third of a bar­rel). I got mine for free from a local white-ware shop (from a bro­ken wash­ing machine, off course).

If you cre­ate the grill your­self, take care that a sausage can not fall through. The met­al needs to be of high qual­i­ty, ide­al­ly stain­less steel. Make a lit­tle bor­der around the grill, this way you can pre­vent acci­dents where a sausage lands in the fire or on the floor.

Instead of 3 met­al poles you can use 6. Attach 2 togeth­er in a way that they do not sep­a­rate if you lift the tri­pod, but allows to sep­a­rate them if need­ed (this allows to take the tri­pod with you). In the Schwenker in the above pic­ture the met­al poles are con­nect­ed with screws to the met­al tri­an­gle, I did not use any tools to attach it hard, I attached the screws by hand. This allows me to detach every­thing with­out any tools. Each of the 3 met­al poles con­sists of 2 small ones. They are con­nect­ed by tap­ping a thread into one, and attach­ing a tube with a cor­re­spond­ing thread to the oth­er one.

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