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Diary, March 2025



Sun Mon Tue Wed Thu Fri Sat
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 23  24  25  26  27  28  29
 30  31


Saturday, March 1, 2025

Rhythmic Landscape

In the afternoon, Conny and I went to Rijksmuseum Twenthe to see some exhibitions. We first went to see the exhibition Seeing & Believing: Sensory experience in the late Middle Ages.. Each room had his own theme. In the room 'Smelling & Believing", we smelled the four smells: Sulfur, incense, kroedwusj (a traditional bouquet of seven specific herbs or plants, a custom rooted in the Limburg region of the Netherlands, particularly tied to the Catholic feast of the Assumption of Mary celebrated on August 15th), and pomander. In the 'Touching & Believing' room, we saw Master of the Glorification of the Virgin, Annunciation: Mary. circa 1465-1475. In the 'Touching & Believing' room, we saw Prayer Nut in the Shape of the Virgin Mary's Head, with the Carying of the Cross and the Crucifixion, 16th century, with some incredible minature sculpting.

At the Elsbeth Cochius exhibition, we saw the linocuts by Elsbeth Cochius. I found the following linocuts noteworthy:

I watched the short documentary about her and her way of working. I took some close-up pictures of Oak Forest because of the intrigated details in the linocut that not visible from a distance. We found this exhibition to the best of what we saw today.

Next, we walked through the treasury rooms. I found the following works (of which most I already have seen) noteworthy:

Finally, we saw the exhibition Me, the other & the earth, the new collection presentation. I found the following works noteworthy:

At 15:37, I bought the exhibition catalogue Elsbeth Cochius written in Dutch by Ingrid Blans, Sipke Huisman, Jet van der Sluis, and Margót Velduizen, edited by Josien Beltman and Elsbeth Cochius, and published by Rijksmuseum Twenthe on Monday, February 17, 2025, ISBN:9789462626126, for € 24.95.


Monday, March 3, 2025

Book

At 17:16:28, I bought the book Graduation 2015, edited by Thomas Widdershoven, written in English and published by Design Academy Eindhoven in 2015, ISBN:9789491400230, from Rataplan for € 3.20.

Mercury

This evening, around half past six, I biked to the bridge over the expressway near our home, to see if I could spot the planet Mercury, which should be visible almost straight below the planet Venus. There were a lot of contrails in the sky and there also seemed to be some thin clouds at the horizon. I had already given up the hope to spot Mercury but decided to wait till seven. At about five to seven, I suddenly spotted a very small light in the sky and concluded that it must be Mercury. I took some pictures, but they did not turn out very well. Below is a small area of one of the pictures, which clearly shows the motion blur. This is the first time in my life that I saw the planet Mercury with my own eyes.


Tuesday, March , 2025

Mercury (2)

This evening, I went outside with a tripod and took some pictures just from the street near our home. I did not use the self-timer, so, most of the pictures do have some motion blur. The last (and best, in my opinion) picture is shown below.


Friday, March 7, 2025

19.0° Celsius

The temperature at Twenthe Airport has gone up to 19.0° Celsius, which breaks the previous record of 16.7° on this date in 1991 by 2.3°. This is the first weather record of 2025.


Saturday, March 8, 2025

19.4° Celsius

The temperature at Twenthe Airport has gone up to 19.4° Celsius, which breaks the previous record of 16.0° on this date in 2014 by 3.4°. This is the second weather record of 2025.


Sunday, March 9, 2025

Going into the city

I biked into the city without a coat. Although it was less warm than yesterday, the temperature went up to 18.0°C (not breaking any record). At 14:27, I stopped at a street tile in remembrance of the boundary marker stone Steen bij de Janninksbleek that was placed along the markes Esmarke and Usselo. The road Dennenweg is this border. The road has been since at least 1850. I had searched for this tile before but at the wrong side of the road. At 15:01, I bought the book Een nieuwe tijd written by Toon Tellegen with illustrations by Rauser, René Knip, Hans Muller, David Benqué, Vittorio Roerade, Paul Faassen, Elspeth Diederix, Harmen Liemburg, and Lava, written in Dutch and translations in English, and published by Grafisch Nederland on Thursday, February 1, 2008, ISBN:9789070809065, from Het Goed for € 7.50. At Tetem Art Space, I saw the exhibition Reality Blinking by en Ho Bin and Santiago Colombo Migliorero. I watched the short film Ep.8 Reality Sandwich: Reality Blinking that they made together. At 15:39, I bought a multigrain triangular bread roll, decorated with sesameseed and linseed for € 1.09 at the SPAR franchise shop in the city center. At Concordia I saw the exhibition Doublet #7: In the sense of scenery with works of the two artists Alexandra Leykauf and Sara Rajaei. From Sara Rajaei the following videos were on display: From Alexandra Leykauf the following works were on display: At 16:26:56, I bought the book Hier mijn hand en dáár je wang: wat intieme correspondentie, correspondence between Heere Heeresma and Laurie Langenbach in Dutch and published by Peter Loeb in 1978, ISBN:9789062130467, from bookshop Broekhuis for € 6.75.


Monday, March 10, 2025

ESP32-S3: Measuring intervals

If you want to use the ESP32-S3 to measure the interval between events on two GPIO ports this is possible with the use of the Motor Control PWM (MCPWM), except of course, if you are not using it to control a motor. It is a bit tricky, if I understand it correctly. The MCPWM has three timers. These are 16 bit timers that have a prescaler. I understand that the prescaler is a divider for the APB clock. But this actually not relevant. The first timer, which is called TIMER0, can be synchronized on signal 160 (as mentioned in Table 6-2), where the input signal is called pwm0_sync0_in and the output signal is called pwm0_out0a. The synchronization is enabled through the value of the MCPWM_TIMER0_SYNC_REG. I presume that the field MCPWM_TIMER0_SYNCO_SEL has to be set to 0 (the default value) to generate the output signal 'sync_out'. The MCPWM also has three 32-bits capture timers, which can be incremented on the APB clock and syncronized on one of the timers 'sync_out', which I presume, for timer0, is the signal 160. On the synchronization the value of the timer is set to the value of the MCPWM_CAP_TIMER_PHASE_REG register. With the one capture timer, there are three capture channels. The first capture channel, is connected to signal 166 of which the input signal is called pwm0_cap0_in. You can select whether you want to capture on the falling or rising edge. I understand that a capture trigger, the current value of the capture timer will be stored in capture register, which for capture channel 0 is MCPWM_CAP_CH0_REG. I presume that this happens everytime when the trigger event happens (taking into account the prescaler). I presume that TIMER0 also need to be started. Take note that some of the settings require an update bit to be set in the MCPWM_UPDATE_CFG_REG before they become effective.


Wednesday, March 11, 2025

ESP32-S3: Measuring intervals (2)

Yesterday, I wrote something about how to measure intervals using the ESP32-S3. It seems that it is possible to synchronize the capture timer without using a timer, like the TIMER0 I mentioned. In the description of the MCPWM_CAP_SYNCI_SEL field of the MCPWM_CAP_TIMER_CFG_REG register it states that the value 4 selects 'SYNC0 from GPIO matrix', which seems to stand for the pwm0_sync0_in signal. The low-level functions are found in the file mcpwm_ll.h of the specific ESP32 variant. The function mcpwm_ll_capture_set_gpio_sync can be used to set the field in the register. This function is called by the function mcpwm_capture_timer_set_phase_on_sync in the mcpwm_cap.c file. More information about how to call this function and other function to set up the capture timer, see MCPWM Capture Timer and Channels and MCPWM Sync Sources in the ESP-IDF documentation.


Wednesday, March 12, 2025

Carte Blanche

At 20:43, on my way to the artist collective B93, I stopped to look at a street tile in remembrance of the boundary marker stone Bröäkersteen that was placed along the markes Esmarke and Usselo. At B93, I saw the exhibitions Asian Artist for Sale by Ho Bin Kim and Like a giant gumball by Santiago Colombo Migliorero. Upstair was the installation of Ho Bin Kim consisting of a 'stall' filled and surrounded by objects and boxes from Asia. Downstairs was the exhibition of Santiago Colombo Migliorero, which consisted of several moving contraptions, like a little bike running circles on the floor or a moving finger. He also had a collection of soils from various places. Even some he brought from Spain. There also was a circle of pottery shards.


Friday, March 14, 2025

Battlegrounds

After work, I went to see the exhibition Battlegrounds with paints by Ayşen Kaptanoğlu at Villa de Bank. Interesting paintings.


Saturday, March 15, 2025

Amsterdam

I went to Amsterdam. I took the metro to De Pijp and visited the bookshop Het Martyrium. It looks like the renovation that it finished. There is a lot of room in the shop, but whereas before they had a lot of bargains, now there are just a few. I did not stay long and went to Stedelijk Museum. There I saw several exhibition. The first exhibition I saw was Sleeping Guards with works by Selma Selman. I saw the following works: I walked through the exhibition Oltre Terra by FormaFantasma, but did not think much of it. Next I saw I Hear You, I Hear You by Nota Turato. From the collection, I found the following works noteworthy: I saw the exhibition POST/NO/BILLS #5: BHLNTTTX by Hezin O. I experienced Manifestation #54 Shifting | Spirit | Time (three-channel video on loop, 5.1 audio, 7 minutes 41 seconds) by julianknxx and studioknxx from 2025. It was kind of meditative and it reminded me of mantra singing. This was really the high light of the visit to the museum.

From the exhibition Circulate – Photography Beyond Frames, I found the following works noteworthy:

More from the collection:

Next, I brought a visit to bookshop De Slegte and The American Book Center where I bought a small, white dodecaherdon, which I found in a basket of dices. It did not have any marks on it, so, it was not a dice.

From there I walked to gallery andriesse & eyck to attend the opening of the exhibition BLING BLING with works by Carel Blotkamp he made in the past 25 years. Most of his works are based on well know art works, which he recreates with sequins. I found some of the works quite impressive. At the moment there is also an exhibition, called Bling, at Centraal Museum. Afterwards, I also paid a short visit to bookshop Scheltema.


Tuesday, March 18, 2025

A day in the Meadows

This evening, I went to visit the exhibition 'A day in the Meadows' at Tankstation with works by the artist mentioned in the COWMAG zines: Beginning #0, Belonging #1, and Becoming #2. The exhibition was curated by Sietse Henselmans and Marsha van Leersum. From the exhibition, I found the following works noteworthy:


Friday, March 21, 2025

21.7° Celsius

The temperature at Twenthe Airport has gone up to 21.7° Celsius, which breaks the previous record of 17.5° on this date in 1956 by 4.2°. This is the third weather record of 2025, if I am not mistaken. On the news they were talking about the fourth national weather record this month.


Sunday, March 23, 2025

Some flowers opened

Yesterday at the end of the afternoon, I saw that some flowers on our magnolia had opened. I counted six that looked like they had at least opened a bit. Today, I did not get as warm as yesterday, but it is still got rather warm, 18.1°C at Twenthe Airport. We have seen a lot of clear blue skies in the past weeks and probably got twice as much sunshine as usual. But that seems to be changing for the coming week. Last night, I looked at the three pots with seeds in our shed, which I put there in October. Today, I brought them in and Conny gave them some water.


Monday, March 24, 2025

Flowers on magnolia

Today, more flowers opened on our magnolia. Below a picture of one flower with in the background many that have not opened yet.


Tuesday, March 25, 2025

Book

At 14:34, I received the book Emigre Fonts: Type Specimens 1986-2016, edited by Rudy VanderLans, written in English, and published by Gingko Press in 2016, ISBN:9781584236207, which I had bought last Saturdayat 18:53 from Mayflower in Leiden for € 39.99. Although, I ordered it through a website for secondhand books, it was shrink wrapped. The primary reason to buy this book is because I saw it in the collection of the Stedelijk Museum on Saturday, March 15.


Wednesday, March 26, 2025

Installing dump1090

I spend some time installing dump1090 (again). The following commands can be used to build the required software: the following command:
git clone https://github.com/librtlsdr/librtlsdr.git
cd librtlsdr
mkdir build
cd build
cmake ../ -DINSTALL_UDEV_RULES=ON
make
sudo make install
sudo ldconfig
cd ../..
git clone https://github.com/antirez/dump1090.git
cd dump1090/
make
To make it work with a DVB-T+FM+DAB dongle, you might have to add the file /etc/udev/rules.d/10-rtl-sdr.rules with the lines:
# original RTL2832U vid/pid (hama nano, for example)
SUBSYSTEMS=="usb", ATTRS{idVendor}=="0bda", ATTRS{idProduct}=="2832", MODE:="0666"
And if your version of Linux loads a kernel module that connects to the dongle, you might have to add the file /etc/modprobe.d/no-rtil.conf with the lines:
blacklist dvb_usb_rtl28xxu
blacklist rtl2832
blacklist rtl2830


Friday, March 28, 2025

Rotterdam Art Week

I went to Rotterdam to attend various activities related to the Rotterdam Art Week. I went there by train.

In the train, I finished reading the book On Anarchism by Noam Chomsky, which I started reading on December 10, last year, after I bought it on October 22. I did not find the main proposition very realistic especially if you realize how in the past decade people all over the world have been embracing fascism so easily it seems. I found the middle part about Spanish Civil War, the most interesting.

Art Rotterdam

I first went to Art Rotterdam. The I also saw the Propects exhibition. At Art Rotterdam, I found the followings works (presented at various galleries) noteworthy:

Prospects

From the Prospects exhibition, I found the presentation of the following artsts noteworthy: Janne Schimmel, Jesse Fischer, Francisco Baquerizo Racines, Gizem Üstüner, Marloes Roeper, Livia Ribichini, Michelle Piergoelem, Lou-Lou van Staaveren, Rosa Ronsdorf, Nolwenn Vuillier, Lilli Weinstein, Adam Centko, Biba Cole, Ugo Petronin, Luke McCowan with Pier at Scheveningen, Meerkoet in the Haangsebos, and Pier at Scheveningen, 2023, Shreya de Souza, Bianca Carague, Alexander Jermilov with Histories computer simulation, 2024, Antrianna Moutoula (with a performance), Annabel van Royen, Ivna Esajas with trying to keep it together, 2, 2024, Oxiea Villamonte with Next of Kin, Mother and daughter, 2025, Mayis Rukel with Movement Song, 2025, Sabine Rovers with We've Always Been Here for You - The Magical Power of Forgotten Plants were you could take one of the cards of the exhibition (I took the a card about the magnolia), Tianyl Zheng, Meike Legêne with De vrouw en de Wolf (photographs and book), 2024, Emilia Martin, Maria Paris Borda with Composición de Luga, 2025, Amrith de Zoete with Merrily II, 2025, Marcos Kueh with KENYALANG CIRCUS: Reconcilliation, 2024, Layla May Arthur, Mari Kolcheva with Language is the Only Homeland, 2023-ongoing, Liza Hoube, Bebe Blanco Agterberg with De nieuwe waterwerken - Tableau I-V, 2025 Rick can der Klooster, Dimitri van den Wittenboer with Home, 2025, Hedwich Rooks with PetrifiCāre, 2025, Christos Mavrodis with In an Endless Reflection, 2024, Hannah Meijer with Markings #1-3 and Symbols #1-6, 2024, Urša Prek with Glory Days, 2025, Dario di Paolantonia with One minute of Distraction, 2025, Lu Lin with Out of Blue Dinner, 2024, Nael Quraishi with An Attempt at Exhausting Several Benches in Karachi, 2025, Jesus Canuto Iglesias with The Sensor, Censers, and the Holy Sensers, 2025, Alexandra Subota with Pink Paradise Punch 2025, and Manju Sherma with Change X, 2024. I got a copy of the catalogue Prospects 2025, edited by Milo Vermeire, written in Dutch, and published by Het Mondriaan Fonds in March 2025, for free.

Buy or Burn: Relics of the Future

At BRUTUS, I saw the exhibition BUY OR BURN: Relics of the Future. I found the following works noteworthy:

TEC ART

At TEC ART, I went to see the exhibition The Brght Side of Dystopia. I found the following installations noteworthy:

Piet Zwart Institute

At the Piet Zwart Institute, I saw the Appreciation exhibition (which include some studios). I like the following works and studios (if I have correctly mapped numbers on the floorplan with the works on display):

The rest

Next, I went to the Pen Plotter Party organized by WORM at the UBIK theater. At this Pen Plotter Party you could order an icecream plotted on three HP 7475A pen plotters (if I am not mistaken) where you could select a coloured sheet, the cone, the icecream, and the topping, all in the colour of your selection. After this, I got a chicken doner kebab at Shoarma De Cocosnoot. I had planned to visit MaMA next, but from the outside it did not look worth paying € 2.00 to go inside. I looked around a bit a bookshop Donner and then decided to take the metro to Wilhelminaplein and from there I walked to pop-up gallary of debsaysyes. They were at the point of closing but allowed me to have a look first. I noted a work by the German artist Franz Licht. I realized, I only saw a small part of the Rotterdam Art Week. Maybe next year, I should stay in a hotel for some days.


Saturday, March 28, 2025

TkkrLab: Open day

Today is the International Open Hackerspace Day 2025. I went to the open day at TkkrLab. Before any guest arrive, I helped a bit with vacum cleaning the stair. I had brought some puzzles with me and the DVB-T+FM+DAB to show how to track planes with dump1090. Another member of the hackerspace had brought a 3D printed sock nitting machine. Shortly after noon, we went outside and observed the partial solar eclipse using two sheets of paper where one of the sheets had a small hole. I showed some guests around our hackerspace. Others did the same.


This months interesting links


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