Foutje in les 3 van Expeditie micro:bit op bladzijde 24

Tijdens het voorbereiden van Expeditie micro:bit vond ik nog een bug in de code van les 3 op bladzijde 24. Het codevoorbeeld doet het niet. Er wordt namelijk nooit een pin op 1 gezet, dus er gaat nooit stroom lopen.

Ik heb dit euvel meteen doorgegeven aan de organisatie en die hebben het aangepast in de versie die online staat. Maar in het gedrukte lesboekje dat in de Digi-Klooikoffer zit, staat natuurlijk nog steeds het foutje. Daarom heb ik de verbetering hieronder aangegeven:

Voor de duidelijkheid nog eens de juiste code voor bladzijde 24:

Wat mij ook opviel is dat het betreffende voorbeeld maar 1x werkt. Als je eenmaal op A gedrukt hebt, gaat de LED daarna nooit meer branden, tenzij je het programmaatje opnieuw start door op de resetknop aan de achterkant van de micro:bit te drukken. Maar dit kan natuurlijk ook aan mijn schakeling liggen 😦

Zelfontworpen micro:bit t-shirt is binnen

Omdat ik graag een leuk t-shirt draag over het thema waarover mijn workshop of les gaat, heb ik voor o.a. Expeditie micro:bit dit shirt laten bedrukken bij spreadshirt met op de voor- en achterkant dezelfde afbeelding. De plaatjes heb ik met de Microsoft MakeCode editor gemaakt en er dan in volledig-scherm-modus een screenshot van gemaakt. In een tekenprogramma de achtergrond transparant gemaakt en zie hier het resultaat (na 1x binnenstebuiten op 30 graden wassen):

Verkeerslichten bestuurd door de micro:bit

Ik had een speelgoedstoplicht gekocht, opengemaakt en geprobeerd met een tweetal AAA batterijen de lampjes zelf aan en uit te doen en boem. Die gevoelige mini-LEDs meteen doorgebrand natuurlijk. Dus ik nieuwe LEDs met pootjes gekocht en wat weerstandjes, en die dit keer ook gebruikt..!

De code heb ik gemaakt in Microsoft MakeCode (een blokjes en JavaScript editor voor de micro:bit) en er een screenshot van gemaakt:

Om ook een model te hebben dat geschikter is voor educatiedoeleinden met het oog op o.a. Expeditie micro:bit en het OpenArtLab heb ik met een klein stukje hout met daarin drie geboorde gaatjes, een beetje zilverkleurige verf en een knijperje een verkeerslicht gemaakt dat in een oud visitekaartjesdoosje past. Hieronder wat foto’s daarvan en een korte video. De gebruikte broncode is overigens dezelfde als hierboven.


Anatomini’s first Physical Appearance

Last weekend (September 9 and 10, 2017) for the first time in my hometown Apeldoorn “Het Festijn met Bouwsteentjes”, loosely translated “The Party with Building Blocks” was organized at the Americahal. As a member of De Bouwsteen, a LEGO user group in the Netherlands, I volunteered during construction day to position tables and wooden plates inside the exhibition hall and to fix/finish some LEGO models that were broken during transport.

A nice side effect of helping out in your municipality is meeting other LEGO fans that might be living in your own neighbourhood or even street without them knowing you or each other. During the actual event I visited several times as a guest, showing big and small friends around the many LEGO displays and shops.

One of the showpieces was Paleis Soestdijk, a former palace of the Dutch Royal Family. It was commissioned by LEGO and built by members of De Bouwsteen in 7 months, taking 900 hours using 60,000 bricks! Here is a picture of the finished model, which consists of three parts that needed to be transported by lorry.

Paleis Soestdijk in LEGO

Another magnificent model that was on live display for the first time was Anatomini. This anatomically correct skeleton that fits inside an upscaled hollow minifigure has been created by Stephan Niks. He was one of the other volunteers I met during the event. He is an engineer and visualisation artist of (air)ports by profession with a keen interest in science and engineering. He told me he designed this model using LEGO Digital Designer. Please vote for this stunning model on LEGO IDEAS in order to increase the chances of having Anatomini turned into a genuine LEGO set. Also check out its beloning updates page for more pictures and a VR video..!

Here are two pictures I took of the display of Anatomini. One on Friday without the actual LEGO model, the second one with this great model live on stage..!

waiting for Anatomini to appear

Anatomini live of stage

For my Second World War interested nephew I bought this German soldier with parachute and other gear from the BRiCKiZiMO Toys stand.

German Soldier with Parachute

A scan of a local newspaper article (in Dutch) about this event can be found here.

LEGO Idea Book 8888 influenced my Life

The “Expert Builder Idea Book” with set number 8888 (published in 1980) – available as pdf, and via a lot of places as separate images, too – was a real eyeopener for me as a kid in the early 1980s. Its cover might ring a bell:

Cover 8888

I have built the Excavator, the Car Chassis and the Yellow Jeep. But the most awesome model was the punch card-like Programmable Crane, as shown below:

prg crane

prg crane 2

Of course the model itself would not win in a beauty contest, but the mechanism of programming a device using gear racks blew my young mind. I have created several variations of this punch card principle back then. I think this model was one of the reasons for me to start saving money to buy my own home computer and to choose an education, and later on a profession, in the software development field..!

Who Let The Dogs Out
But there is one other model in the book I particularly like, and that is the Mechanical Dog. I will show all instruction pages here, because there are only 4, of which 2 contain the actual building steps:

Showing dogs

Building dogs

I was able to build only one dog in the 1980s but now I have created all three! They walk a bit slowly in the next video.

But when I changed the gears on the legs of one dog from 8 and 40 teeth to 24 and 24 teeth that one outruns the others..!

From Race Plane to War Plane

For his 11th birthday I bought my WW2-interested nephew (the same one I got the soldiers and assembled the ambulance for) the #60144 Race Place as seen below:

race plane

Then I used my own dark tanned, dark and light bluish gray and black LEGO bricks to change it into a war plane for him. And I created and added some matching stickers. The result is shown here:

war plane

Finally I ordered this Panzer Crew Driver with helmet and goggles – now acting as a pilot – from BRiCKiZiMO to complete the scenery…

panzer crew driver

Just build me a Church

Last December, while visiting Mini Billund, a privately owned must see little LEGO museum (plus shop) in Wagenberg, the Netherlands, I took a picture of the following LEGO set of a typical Danish church in one of the many glass cases:


On the Brickset Forum I found the following data about this set. It was made from 1957 until 1962. Its set number is 1309 in Scandinavia and was sold starting 1958 in continental Europe using set number 309.

In those days the bricks where nicely displayed in their box as shown here:


The actual building of such a model was a more challenging task, though. That is because this set did not have separate building instructions. The pictures on the box were the only help you got. So the picture on the cover plus the one shown below were supposed to be enough. I guess you needed a lot of counting and guessing back then…


Fortunately, I found a very useful .lxf file on this page. I saved a backup here. It can e.g. be opened using LEGO Digital Designer but can also be imported by (which by the way has very nice BrickLink integration). The next image shows the model after importing it in, and after I removed two 1 x 2 white bricks to be replaced by windows. I removed those bricks because I finally found one image that showed the church from the back.

Church in

Inspired and helped by the aforementioned digital drawing I have recreated this 60-year-old model using my own white and red LEGO bricks. But it took a while to pick the not so much discolored white pieces from my collection. The only parts I had to order via BrickLink were all the windows. Some pictures of the final result are shown here (click on image to enlarge):

church01    church02

church03    church04

LEGO Technic and the Commodore 64 – Part VI

During the Christmas season I found the time to create another project from the book published in 1985 entitled “Make And Program Your Own Robots for the Commodore 64 and VIC-20” I started blogging about here.

I skipped the project called “Card Reader”, some kind of punch(ed) card reader able to translate holes punched in a piece of cardboard into binary code. Maybe I will try that some other time.

This time I created the Mini Arm project. It requires two 4.5V motors and some pretty intricate wiring. I made a copy of the page and used different color felt tip pens to make the schema more readable, as shown below.

Wiring Schema

This time two homemade switches were needed, again constructed using a paperclip, some tinfoil and a small rubber band, as seen in Part V.

Two Switches

The Commodore 64 BASIC program belonging to this project has a “Teach Moves” mode and a “Repeat Moves” mode. While in Teach Mode the keys 1 and Q make the arm turn and keys 2 and W make it go up and down. At the end of each move press key S to save that particular move.

Below are some videos of the working arm. We start with an overview and end with some LEGO brick lifting.

A Brick a Day keeps the Doctor Away

Today the last bricks arrived (ordered via BrickLink) enabling me to finish building the Lego WWII German Opel Blitz Ambulance found on Brian (Fitzsimmons)’s Bricks Instructions YouTube channel. It will be a gift for my nephew, who specifically asked me if I would create this model for him. He is the same nephew for which I ordered the Axis and Allies Soldiers from BRiCKiZiMO. Below are some pictures of the finished model:

Opel Blitz Ambulance (sideways)

Opel Blitz Ambulance (back)

I also ordered this wounded soldier for him to act as a passenger inside the ambulance:

Wounded soldier