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Blog page on fischertechnik robotics and embedded systems.

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All pictures and videos: copyright Huub van Niekerk. No reproduction without prior permission.

2022
23 September 2022 Blog 495
 
Hydraulics: Need to fix a wire to do a sensor test. After saying goodbye, I find a problem, so there's an epilogue. Click the image to watch the video.

Hand: Modifying the hand pitch sensor mount and checking the Python code: it's needs a change! Click the image to watch the video.


16 September 2022 Blog 494
 
ESP32: It's time to replace the screwpump which requires a reconstruction. How will it work out? Click the image to watch the video.

Mirft2: Checking LEDs and voltages and testing via Python and RoboPro. Click the image to watch the video.


2 September 2022 Blog 493
 
Electronics: It's time to replace the screwpump which requires a reconstruction. How will it work out? Click the image to watch the video.

Discovery: Checking LEDs and voltages and testing via Python and RoboPro. Click the image to watch the video.


26 August 2022 Blog 492
 
Hydraulics: It's time to replace the screwpump which requires a reconstruction. How will it work out? Click the image to watch the video.

Hand: Sensor mount reconstruction for hand pitch and test. Click the image to watch the video.


19 August 2022 Blog 491
 
ESP32: After last time, I need to check and probably replace the ESP-IDF toolchain. How will that work out? Click the image to watch the video.

Mirft2: Checking gears, power issues, adding socks. What can possibly go wrong? Click the image to watch the video.


12 August 2022 Blog 490
 
Discovery: adding LEDs, connection oops, Python, RoboPro, finding some issues. Click the image to watch the video.

Electronics: I have to test and compare potmeters, since it went wrong last time. Also creating schematics in KiCad en gEDA. Short simulation in Scliab. Click the image to watch the video.


5 August 2022 Blog 489
 
Arduino Mega2560: Focussing on the voltages from the potmeter, I compare the values on the 2560 and the Uno. And find a riddle. Click the image to watch the video.

Hand: Of all the issues that are still there, the focus is on the hand-pitch mechanism for some test and diagnostics. Click the image to watch the video.


29 July 2022 Blog 488
 
Hydraulics: After being a partial fail at the Montfoort convention, I need to check. Click the image to watch the video.

EPS32: after 3(!) years a new attempt to use ESP-IDF. Click the image to watch the video.


22 July 2022 Blog 487
 
Mirft2: After being a total fail at the Montfoort convention, I need to check. Click the image to watch the video.

Electronics: The fans seem not to work anymore, but why? Click the image to watch the video.


15 July 2022 Blog 486
 
Discovery: After being a total fail at the Montfoort convention, I need to check. Click the image to watch the video.

Hand: After failing at the Montfoort convention, I need to fix things. Click the image to watch the video.


8 July 2022 Blog 485
 
Electronics: Testing PSU fans and some electronics. Click the image to watch the video.

Mydfir: After failing at the Montfoort convention, I need to find the cause and fix it. A quick fix, but slow testing (yawn). Click the image to watch the video.


1 July 2022 Blog 484
 
Beachsailer: Reconstruction and testing with ventilators & propellor. Click the image to watch the video.

Arduino Mega2560: More rewiring is necessary, as well as testing. Click the image to watch the video.


24 June 2022 Blog 483
 
Hydraulics: Trying out rewiring plans and a replacement can't be that hard, can it? Click the image to watch the video.

Hand: More rewiring is necessary, as well as testing. Click the image to watch the video.


17 June 2022 Blog 482
 
Beachsailer: Should I reconstruct the original one or build another one and compare? Click the image to watch the video.

Mirft2: Adding lamps for motors check and getting a surprise result. What's up? Click the image to watch the video.

Arduino Mega2560: After data acquisition, edit is needed, then processing with R, Fortran and Python (forgot Octave). Click the image to watch the video.


10 June 2022 Blog 481
 
Hydraulics: Trying out rewiring plans and a replacement can't be that hard, can it? Click the image to watch the video.

Hand: After adding a new LED, a challenging rewiring shows up. Click the image to watch the video.


3 June 2022 Blog 480
 
Discovery: Testing once more on distance, course and data file, then finding the cause of the file problem. Click the image to watch the video.

Beachsailer: New series: can the beachsailer actually sail? Click the image to watch the video.


27 May 2022 Blog 479

Hydraulics: Code change to make the last LED work better and refilling the pistons, with a challenge. Click the image to watch the video.

Mirft2: I need to check the frame and meet a little challenge while fixing it, walking test and friction check & attempt to fix it. Click the image to watch the video.

Hand: A new attempt to bring more tension to the chain + adding an LED which brings rewiring with it. Click the image to watch the video.


20 May 2022 Blog 478

ESP32: Applying the TMP3602 temperature sensor. How hard can it be? Click the image to watch the video.

Discovery: Testing the riding again shows that most goes well, though not identical. But why doesn't it go all well? Click the image to watch the video.

Arduino Mega2560: Further testing Fortran, R and adding Python to the handling of the data. Click the image to watch the video.


13 May 2022 Blog 477

Hydraulics: Continuing the LED story, I can add one for the phototransistor by using the controller directly, do some rewiring and make a code change. Click the image to watch the video.

Mirft2: Checking gears and OpenCV. Click the image to watch the video.

Hand: Testing after reconstruction and fixing some (not all) issues. Click the image to watch the video.


6 May 2022 Blog 476

ESP32: Testing the transistor circuit again, I decide to get back to simulation using SciLab. Which leads to a surprise and after checking the web to a conclusion. Click the image to watch the video.

InfraRed: Comparing with Bluetooth to see whether or not make another car. In the meantime something odd happens. Click the image to watch the video.

Arduino Mega2560: Further testing Fortran, R and adding Python to the handling of the data. Click the image to watch the video.


29 April 2022 Blog 475

Hydraulics: I need to improve the connection between the screw pump and the piston. But how? Click the image to watch the video.

Hand: Further reconstruction of the wrist motor suspension. Click the image to watch the video.


22 April 2022 Blog 474

Discovery: Before driving, some checking is done & a fix is need. Then the real stuff: how does it behave? Some surprises! Click the image to watch the video.

Arduino Mega2560: After an off-screen test, I find that I have to change both C and Java code. Then adjust the data file and read it with both R and Fortran. Question: is it any good? Click the image to watch the video.


15 April 2022 Blog 473

Hydraulics: Trying to add an LED to the phototransistor leads to finding problems that needs fixing. In the end: does the LED work as assumed? Click the image to watch the video.

Hand: Focus on the wrist pivot motor: a reconstruction is need, but during the works some problems show up. Click the image to watch the video.


8 April 2022 Blog 472

ESP32: Verifying the transistor circuit, I find that the main component isn't what it is supposed to be. But after replacement, does it work any better? What does simulation show? Click the image to watch the video.

Arduino Mega2560: First focus: connecting the potmeter to a multimeter. Then: reading the data. First via Fortran (meeting with some issue) then serial data. Click the image to watch the video.


1 April 2022 Blog 471

Hydraulics: I need to improve the connection between the screw pump and the piston. But how? Click the image to watch the video.

Bluetooth: Checking 3 power sources, adding another motor and what's with "2)))"?. Click the image to watch the video.

Hand: Adding more LEDs but this time to the arm pitch. This brings challenges as well as riddles. Click the image to watch the video.


25 March 2022
Blog 470

ESP32: Checking the LEDs & transistor circuit, leading to replacement and rewiring. Click the image to watch the video.

Mirft2: Checking camera images, influencing walking direction and sensory data. Click the image to watch the video.

RaspberryPi1 B+: After the RPi3 test with the RaspiCam, I need to check it on here. Click the image to watch the video.


18 March 2022
Blog 469

Hydraulics: Adding another LED, leading to rewiring and reconstruction. Then some overall testing. Click the image to watch the video.

Discovery: Continue checking images taken with the camera and finding strange directions, i.e. tales of the unexpected. Click the image to watch the video.

Hand: During preparation and testing, I find I have to fix wiring and a witch. And a gear. And not all are easy to do. Click the image to watch the video.


11 March 2022
Blog 468

ESP32: Trying to get the added LED, button and transistor to work...but first meeting with other elements that seemingly don't work immediately. Click the image to watch the video.

Mirft2: Focus on walking based on the colour separation...changes to focus on bad walking. After that back to OpenCV. Click the image to watch the video.

Arduino Mega2560: First focus: connecting the potmeter to a multimeter. Then: reading the data. First via Fortran (meeting with some issue) then serial data. Click the image to watch the video.


4 March 2022 Blog 467

Bluetooth: Reconstructing the frame for stabilization and some testing. Click the image to watch the video.

Discovery: Focus on the driving from 2 (or 3) distances, grabbing images & observing behaviour. Click the image to watch the video.

Raspberrypi3: Trying to use an HDMI cable and the raspicam. What will work and what won't? Click the image to watch the video.

25 February 2022 Blog 466

Hydraulics: Tests..... Click the image to watch the video.

Mirft2: Continue checking images taken with the camera and more on LEDs and the sensors. Click the image to watch the video.

Hand: Adding more LEDs but this time to the arm pitch. This brings challenges as well as riddles. Click the image to watch the video.

18 February 2022 Blog 465

ESP32: First, testing the motors and humidity/temperature sensor. Then: adding a button, transistor and LEDs. Click the image to watch the video.

Discovery: Focus on the visualizing the sensors with electronics and driving with and without camera. Click the image to watch the video.

Arduino Mega2560: Starting with a power issue, continuing with the analog signall, check with a multimeter & changing the Fritzing schema. Click the image to watch the video.


11 February Blog 464
 
Mirft2: After the walking problem is kind of solved, the touch sensors are not. Can I add LEDs and how? Click the image to watch the video.

Hand: Adding more LEDs and resistors and yet more rewiring. Testing with ftdiagnose and Python. Full test of arm and hand. Click the image to watch the video.


4 February Blog 463

RaspberryPi3: Going further on the audio, can I make a recording? Click the image to watch the video.

RaspberryPi 1B+: Back to trying to use the raspicam with C# and (of course) meeting with some issues. Click the image to watch the video.

Arduino Mega2560: Adding a potmeter to the Uno, with wiring to the Mega2560, adding to C & Fortran & changing the Fritzing schema. Click the image to watch the video.


28 January Blog 462

ESP32: First focus is to troubleshoot the DHT11 sensor which gives NaN as result. Then back to the SG90 servomotor which doesn't work anymore. A solution is found, but leaves questions for the future. Click the image to watch the video.

Mirft2: Another attempt with touch sensors and their data leads to a big change of the algorithm. Click the image to watch the video.

Hand: Adding an LED to the hand pitch so it's not just software signaling, but rewiring is needed. Click the image to watch the video.

21 January 2022 Blog 461

Hydraulics: Some reconstructions and a modification to hopefully get things work better. Click the image to watch the video.

Discovery: Focus on the driving again, without and with camera, I come across some unexpected behaviour. Click the image to watch the video.

RaspberryPi2 & C# - mono: A new attempt to get the Gtk window to work as I want it. Click the image to watch the video.


14 January Blog 460

RaspberryPi3: Wondering about the audio quality, I decide to play some music. With some unexpected results. Click the image to watch the video.

RaspberryPi 1B+: Another attempt in trying to use C# to read the status of a fischertechnik photo-transistor. Click the image to watch the video.

Arduino Mega2560: Adding a potmeter to the Uno, with wiring to the Mega2560, adding to C & Fortran & changing the Fritzing schema. Click the image to watch the video.


07 January Blog 459

ESP32: By rewiring, getting both motors to work and fixing both Fritzing and gEDA/gschem. In the end, facing yet another problem. Click the image to watch the video.

Mirft2: With OpenCV in mind, the plan grinds to a halt because of walking problems. When the solution is found, the algorithm needs a check. Click the image to watch the video.

Hand: Reconstruction of camera hold and rewiring the hand pitch sensor. Ending with a riddle. Click the image to watch the video.