Leave a comment:
Dear Spammers and Trolls: All comments are checked by myself before publishing!
The manual inspection is why it takes some time until your text appears in the comment section (as long as it passes my inspection) - be patient...

I don't answer comments by mail!
Note the rules and my mail address in the column contact!

Norbert

Name:
Comment:
Formular:


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Seite: technics-machines-3D-printer-CR-10_ge.htm
Datum: 2018.10.16 15:37:45 (UTC+1)
Name: Troll

Kommentar:
Lieber Nobbi,

wofür baust du eigentlich die Kabelkette?

Me: Berechtigte Frage, denn bislang habe ich die noch in keiner meiner Maschinen eingesetzt...
Allerdings bestehen die Kettenglieder von R11 aus einer Weiterentwicklung der resprünglichen Kabelkette.

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Page: technics-machines-cnc-T8_en.htm
Date: 2018.10.15 22:13:05 (UTC+1)
Name: Brad

Comment:
Well, I think you were lucky. Mine has about 2mm runout on the spindle, the y leadscrew was bent and the spindle will trigger hard limits even when wired NC with noise supression. All in all, a frustrating, expensive waste of time. Maybe of some use to masochists but apart from that, useless lol. Broken-up for parts.

Me: Sorry, looks like you really draw a blank in the cheap electronics raffle...
I got feedback from another user that also had issues with triggering the hard limits due to noise caused by the spindle motor. Meanwhile I quit my first intention of improving the design of this machine. Instead I will show how to scrap it for one of my DIY designs.

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Page: technics-machines-plotter-cdrom_en.htm
Date: 2018.10.15 16:10:03 (UTC+1)
Name: Andrew

Comment:
Norbert, I have begun collecting parts to try building one of these so I can learn microelectronics. Thanks for the excellent idea and tutorial. Can you recommend a source for the L298N bridges in USA? Also, are those capacitors connected to the L4940V5? I am referring to: https://www.homofaciens.de/bilder/technik/plotter-cdrom_010.htm

Thanks in advance!

Me: L298N bridges are commonly available. Just Google for it and pick the online shop you trust.
As you can see on the drawing you refer to, the capacitors are connected to the pins of the L4940V5 which is a 5V linear voltage regulator. The capacitors smothen the input and output voltage. The regulator is not needed if you use a 5V DC power supply instead of the 6V lead acid battery I was using.

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Seite: technics-robots-R11-construction_ge.htm
Datum: 2018.10.15 16:38:19 (UTC+1)
Name: Troll

Kommentar:
Lieber Nobbi,

kann man auch Aduino Unos für Roboter (wie die im Robospatium verwenden?

Me: Der Arduino Uno hat keinen Kamera- und keinen Netzwerkanschluss, daher geht's nicht ohne noch einem Raspberry Pi oder sonstigen Rechner.
Wenn der Roboter aber nicht über einen Browser ferngesteuert werden soll, kann man mit dem Arduino Uno auf jeden Fall Roboter bauen. Sehr beliebt sind sogenannte "line follower", die über Photosensoren einer aufgemalten Linie folgen.

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Page: technics-machines-3D-printer-Tevo-Michelangelo_en.htm
Date: 2018.10.14 20:23:01 (UTC+1)
Name: WRTUSA

Comment:
I just got a TEVO Tarantula.
I saw you 3d printer views.
When the TEVO Tarantula started up I had the Z axis motor mount crack.
I taped the crack, printd a new motor mount and installed it.
Use my 3D printer to fix 3D printer.

Me: Yes, that's the spirit you must have when buying cheap printers - well done!

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Seite: technics-physical-computing-switching-LEDs_ge.htm
Datum: 2018.10.14 14:58:55 (UTC+1)
Name: Troll

Kommentar:
Lieber Nobbi,

kann man die Spannung an den GPIO eigentlich auch variieren?

Me: Nein. Lediglich durch Pulsweitenmodulation kann man die mittlere Spannung reduzieren. Dabei werden aber mit hoher Frequenz Pulse mit der jeweiligen Logikspannung des GPIOs (meist 3.3 oder 5V) ausgegeben.
Nur durch externe Schaltkreise (Transistoren) kann man die Spannung herauf- oder heruntersetzen.

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Seite: technics-computer-io-boards_ge.htm
Datum: 2018.10.13 10:42:43 (UTC+1)
Name: Troll

Kommentar:
Lieber Nobbi,

schalte doch mit einem Relais mit niedrigerer Versorgungsspannung das Relais :)

Me: Spannung ist nur eine Variable der Rechnung. Relais benötigen einen - im Vergleich zum Transistor - wesentlich höheren Strom und den können GPIOs in der Regel nicht liefern.

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Page: technics-machines-3D-printer-Zonestar-M8R2_en.htm
Date: 2018.10.11 22:09:11 (UTC+1)
Name: leifgw64

Comment:
Good work Norbert!
I got one m8r2 myself, and helped a friend build one too.
Would be nice to know if this Marlin firmware is worth to use instead of Repetier.

We had lot of problem with plastic leaking out from the hot end.
We fixed that, by tighening them hard and applying some loc-tite.
We also have problem with some of the motordrivers, had to make an extra cooling otherwise they overheat.

Me: The Marlin firmware offers far less functions from the printer menue, but at least on my machine the results in two tone printing were better.
I'll have an eye on plastics leaking and the motor driver temperature on future prints, I did not notice anything wrong with that on my machine (yet).
Thanks for sharing your ideas!

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Seite: technics-machines-winchbot-2-0_ge.htm
Datum: 2018.10.11 09:46:18 (UTC+1)
Name: Troll

Kommentar:
Lieber Nobbi,

..und 1 Winde für 1-dimensionales.

Me: ...um gestrichelte Linien zu zeichnen.

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Seite: technics-machines-robot-arm-v0-1_ge.htm
Datum: 2018.10.10 21:23:56 (UTC+1)
Name: Troll

Kommentar:
Lieber Nobbi,

wieso benutzt du keine "proffessionelle" Schraubenschlüssel sondern selbst gebaute?

Me: Wieso nicht? Von den kleinen 5.5er hatte ich außerdem zu dem Zeitpunkt keine in meinem Bastelkeller.

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Seite: technics-machines-v-plotter_ge.htm
Datum: 2018.10.10 21:20:50 (UTC+1)
Name: Troll

Kommentar:
Lieber Nobbi,

#letzter Kommentar *anstatt der H-Brücken

Eine Himmbeere mit schwarzem Rand :)

Me: Weil Relais viiiel zu langsam schalten, um damit die beiden Schrittmotoren mit einer sinnvollen Drehzahl antreiben zu können.




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Seite: technics-machines-v-plotter_ge.htm
Datum: 2018.10.10 21:06:57 (UTC+1)
Name: Troll

Kommentar:
Lieber Nobbi,

warum benutzt du keine Relais?

Me: Warum, wie und wo sollte ich?

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Seite: technics-machines-cnc-T8_ge.htm
Datum: 2018.10.10 20:39:38 (UTC+1)
Name: Troll

Kommentar:
Lieber Nobbi,

#Schrumpfschlauch mit Lötkolben schrumpfen

wie unproffessinionell ich empfehle einen Heißluftföhn

Me: Gestattet ist, was funktioniert, mein lieber Trolli. Mit dem Lötkolben kann man gezielter erhitzen.

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Page: robospatium-controlstation-R11_en.htm
Date: 2018.10.10 14:22:10 (UTC+1)
Name: Qwq

Comment:
Great work prof.
First i though its picture then after 2 minutes i saw oil truck on the street.  :D

Me: Thanks!
The robot transmits a series of still images to your browser which is why it takes a couple of seconds until you can see what the transmitted command did. Driving around is a bit like commanding a rover on a distant planet.



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Seite: technics-machines-cnc-v3-0_ge.htm
Datum: 2018.10.09 16:32:32 (UTC+1)
Name: Troll

Kommentar:
Lieber Nobbi,

du könntest ja auch mal Lego Mindstorms in deine CNC Reihe aufnehmen.

Me: Ich behalte Lego als Baumaterial mal im Hinterkopf. Die Mindstorms Steuerung mit den entsprechenden Motoren ist mir aber zu speziell. Ich baue lieber mit Zeugs, das ich in alten Geräten finde.
Ich könnte meine Meinung aber ändern, wenn Lego sich bei mir meldet und ne Kiste mit Elektronik zusendet ;-)

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Page: technics_en.htm
Date: 2018.10.08 15:52:46 (UTC+1)
Name: Alfonso

Comment:
I agree with other users, you are a genius. I'm learning a lot of things, thank you!
Now I have a tons of new ideas for my experimental projects.
Again, thank you!

Me: You're welcome!

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Seite: robospatium_ge.htm
Datum: 2018.10.07 23:12:39 (UTC+1)
Name: Troll

Kommentar:
Beschreibung von R10 auch auf Englisch.

Me: Jetzt nicht mehr - besten Dank für die Rückmeldung!

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Seite: technics-machines-3D-printer-CR-10S_ge.htm
Datum: 2018.10.07 09:46:01 (UTC+1)
Name: Arno Nym

Kommentar:
Moin Moin,

in deinem Test Video nutzt du einen Klebestift bei mir löst sich das leider aber immer wieder ab.

Gibt es einen Tipp was man bei der Kleberwahl bzw Anwendung berücksichtigen sollte? Möglicherweise ist mein Kleber (Prittstift Original) einfach ungeeignet.

Ich möchte ungern wie es einige Amerikaner tun die Glassplatte mit Schleifpapier misshandeln. Deswegen frage ich einfach mal.

Vielen Dank für deine Zeit.

Me: Mit welchem Material druckst du? Die Druckbett-Temperatur zu erhöhen oder den Abstand Druckbett-Düse etwas zu verringern hilft, die Haftung zu verbessern. Ich verwende billigen no-Name Kleber, an dem Pritt liegt's wohl nicht.



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Page: robospatium-controlstation-R10_en.htm
Date: 2018.10.04 14:25:27 (UTC+1)
Name: SCHLUMPFabu

Comment:
hallo

Me: Control station RoboSpatium to Schlumpf: Hallo received!

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Page: robospatium-controlstation-R11_en.htm
Date: 2018.10.02 19:52:35 (UTC+1)
Name: Al

Comment:
awesome idea mate.... but unfortunately it was very laggy being controlled from Australia but i will keep checking back in for some fun.....

Me: Thanks!
Well, there couldn't be a longer distance between my RoboSpatium and you - the signals are going around the globe. Furthermore, in the evening hours now here in Germany there is much traffic on the line.

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Seite: technics-physical-computing-set01_ge.htm
Datum: 2018.10.01 14:24:51 (UTC+1)
Name: Troll

Kommentar:
Schnauze!!!!  Hahaha

Me: ...ein eindeutiger Sprachfefehl ;-)

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Seite: technics-electrochemistry-periodic-table-content_ge.htm
Datum: 2018.09.28 13:13:09 (UTC+1)
Name: Troll

Kommentar:
Lieber Nobbi,

Helium hat, als Edelgas, keine Elektronennegativität.

Me: Lieber Trolli, auch einige Edelgase besitzen - je nach verwendetem Modell -  eine Elektronegativität. Nach der von mir verwendeten Pauling-Skala wird für Helium allerdings kein Wert angegeben. Ich hab's soeben rausgelöscht, nochmals besten Dank für's genaue Hinsehen.


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Seite: technics-electrochemistry-periodic-table-content_ge.htm
Datum: 2018.09.28 13:10:31 (UTC+1)
Name: Troll

Kommentar:
Lieber Nobbi,

Fluor wird F-l-u-o-r geschrieben und nicht F-l-o-u-r.

Me: Lieber Trolli, das stimmt und wurde soeben korrigiert. Besten Dank für die Richtigstellung.




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Seite: robospatium-controlstation-R11_ge.htm
Datum: 2018.09.26 12:09:56 (UTC+1)
Name: Fastfix

Kommentar:
Super !!!

Me: Das freut mich doch auch!

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Page: games-numbersystem-01_en.htm
Date: 2018.09.25 21:12:10 (UTC+1)
Name: yo mama

Comment:
Game 'Number systems' solved in 48.212s. Difficulty: Easy, Operation: Binary

lol

Me: :))




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Page: contact_en.htm
Date: 2018.09.25 13:52:45 (UTC+1)
Name: ZONESTAR

Comment:
Hi Norbert,
For the printer of M8R2, we now have upgraded the firmware to base on marlin and there is an interesting feature is that it can covert a single object to mixing color object, if you are interest in this feature, please download the new firmware from the below link:

Firmware HEX file:
https://drive.google.com/drive/folders/1JHiPuh-frUvA_RXHAlLoXkh6CPSX0tn0

User guide for marlin firmware:
https://drive.google.com/drive/folders/1rTKPDsJM7QPawu7N-2mY0p6p3SJhF5K3

Me: Thanks for sharing, would be nice if you'd also share the source code, which is part of the Licence agreement of Marlin, isn't it?
To all willing to try a new firmware:
Flashing firmware may cause damage, do it on your own risk!

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Page: technics-machines-cnc-v3-2-1_en.htm
Date: 2018.09.25 09:33:30 (UTC+1)
Name: Oleg

Comment:
Good morning. Thank you for the project.
Can i use simple buttons instead of photodetectors to detect zerro position of carriage?
What changes should i made to scheme and sketch?
Thanks a lot.

Me: Yes, simple buttons will work as well. To be honest, I only used those end switches once for the video and never again. I am going to zero manually.

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Page: robospatium-controlstation-R11_en.htm
Date: 2018.09.25 08:59:15 (UTC+1)
Name: roland

Comment:
vielleicht gibst du einen spiegel auf den dachboden, wäre lustig. vielen dank für deine projekte.

Me: Bitte gerne und danke für die Rückmeldung. Spiegel ist schon da, direkt gegenüber vom Fenster (etwas knifflig davor zu fahren, eventuell installiere ich daher noch einen 2. Spiegel).

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Page: robospatium-controlstation-R11_en.htm
Date: 2018.09.24 22:53:29 (UTC+1)
Name: Chebhou

Comment:
How do I move it, I couldn't find the user guide

Me: Sorry, the user guide is still under construction. Here comes the simple version:
1.) Press "OK" and enter your user name
2.) Press on the Yellow frame around the picture to drive the Rover e.g. top right angle moves forward right

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Page: robospatium-controlstation-R11_en.htm
Date: 2018.09.25 07:52:20 (UTC+1)
Name: Pavel

Comment:
Nice, but can't wait so long for control release.

Me: Shortly after releasing a video, there is usually indeed lots of traffic in my Robospatium...




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Page: robospatium-controlstation-R11_en.htm
Date: 2018.09.25 00:06:51 (UTC+1)
Name: tbarna

Comment:
Thansk! :)

Me: You're welcome!




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Seite: robospatium-controlstation-R11_ge.htm
Datum: 2018.09.24 23:26:38 (UTC+1)
Name: Jan

Kommentar:
Schönes Projekt, macht wirklich Laune ein wenig rum zu fahren :)

Viele Grüße aus dem Norden,

Jan

Me: Grüße zurück aus der Mitte



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Seite: technics-robots-R11-construction_ge.htm
Datum: 2018.09.24 20:21:33 (UTC+1)
Name: Michael Braun

Kommentar:
Was für ein cooles Projekt! Ich freu mich schon aufs Nachbauen :)

Me: Danke! Mit dem Nachbau würde ich aber noch etwas warten, ich werde das Design noch deutlich überarbeiten. Weitere Videos folgen...


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Page: games-sequence-01_en.htm
Date: 2018.09.23 06:39:41 (UTC+1)
Name: Oleg

Comment:
Game 'Number sequence' made with a length of 14 numbers. Difficulty: Middle

Thanks for nice games

Me: You're welcome!

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Page: technics-machines-cnc-v2_1_en.htm
Date: 2018.09.20 05:58:35 (UTC+1)
Name: SandroH

Comment:
Hello Sir, what software name you use to create Gnome G Code.nc ?
Thanknu sir

Me: I am using Easel.

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Page: technics-machines-plotter-cdrom_en.htm
Date: 2018.09.16 15:57:52 (UTC+1)
Name: Hemant

Comment:
Many thanks today I was able to complete this project. Its really fun to get the results at the end. Initially I was getting mirror image later i switched the y Axis pins and it started working. Let me know if you would like to see images.

Me: Some photos or a video would be nice. I definitely like that kind of feedback.

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Page: response_en.htm
Date: 2018.09.11 19:47:06 (UTC+1)
Name: ugekje

Comment:
Comment to use of 2N7000: The threshold voltage, commonly abbreviated as Vth, of a field-effect transistor (FET) is the minimum gate-to-source voltage VGS (th) that is needed to create a conducting path between the source and drain terminals (Wikipedia)
I.E there is stil relativly high ON resistance. In the datasheet the lowest ON resistance (5 ohm) is at Vgs 10VDC. For information only.

Me: Totally right. Is this a comment concerning a special project of me that makes use of the 2N7000?


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Page: contact_en.htm
Date: 2018.09.11 19:21:11 (UTC+1)
Name: Paulo

Comment:
Hello Norbet, I am trying to use the code provided in this link https://homofaciens.de/technics-base-circuits-computer-mouse_en.htm and it freezes in the "Setup" on the serial. Could you please tell me what could be wrong? I am using an Arduino micro to run the code.

Me: There is more than one code used in this chapter. What Arduino sketch are you exactly talking of?

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Seite: games-memory-01_ge.htm
Datum: 2018.09.11 17:45:32 (UTC+1)
Name: webman

Kommentar:
Spiel 'Zahlenpaare' gemeistert in 47.657s. Schwierigkeitsgrad: Mittel

ganz nett

Me: Ganz gut.




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Page: games-numbersystem-01_en.htm
Date: 2018.09.11 17:13:08 (UTC+1)
Name: TheLegend27

Comment:
Game 'Number systems' solved in 20.096s. Difficulty: Easy, Operation: Binary

..

Me: ..., too.




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Page: technics-base-circuits-computer-mouse_en.htm
Date: 2018.09.11 11:31:48 (UTC+1)
Name: qwerty

Comment:
thanks mate i figure it out already. thank you for codes :)

now its working GREAT :))

Me: The most intensive learning is finding the solution by yourself - well done!




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Page: technics-base-circuits-computer-mouse_en.htm
Date: 2018.09.11 11:14:38 (UTC+1)
Name: qwerty

Comment:
hello again

i did your coordinate project. its working fine. but i dont want to read delta x or delta y. i want to read actual position .for example this is on my comport monitor:
11000 delta X=-1  delta Y=1
11000 delta X=-1  delta Y=0
1000  delta X=0 delta Y=0
1000  delta X=0 delta Y=0
11000 delta X=-1  delta Y=2
11000 delta X=-1  delta Y=0

its getting zero when i stoped to movement. i want to read coordinates like on your optical encoder project. which part of codes should i change ?

Me:



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Page: technics-base-circuits-computer-mouse_en.htm
Date: 2018.09.11 10:27:20 (UTC+1)
Name: qwerty

Comment:
hello Norbert..

i did that project and its working fine. but i want to read coordinates as fast as arduino can and also i dont want to read delta x or delta y , i want to read actual position (for example actual position =recent position + current position ). i checked up your codes but didnt understand anything . can u help me please ??


Me: I am very confident you understood something of the source code - which package exactly are you talking of? (I have written more than one example code). So read it again and ask more specific questions about it - that's the only kind of help I can offer.

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Page: technics-machines-plotter-cdrom_en.htm
Date: 2018.09.04 22:06:52 (UTC+1)
Name: Fred

Comment:
Nice project !! Question: Will it work on a Raspberry P1 3?
Are There differences in GPIO between Raspberry Pi 2 B and 3 B?

Me: Thanks! It should work on all versions of the Raspbreey Pi without changing the GPIOs. WiringPi uses the same numbering scheme on all versions.



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Seite: project_ge.htm
Datum: 2018.09.04 04:02:30 (UTC+1)
Name: Ingo

Kommentar:
Hallo Norbert,
dieser Kommentar ist ein Hinweis
zu einem Tippfehler

in : " (II.) Buttom Up
Zeile 6 ( mobile Version )

"...Schlüsselelement ZUN Schalten..."

ich mag dein Projekt.

:)

Me: Besten Dank, ist korrogiert.

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Seite: technics-semiconductor-JFET_ge.htm
Datum: 2018.09.04 03:31:37 (UTC+1)
Name: Ingo

Kommentar:
Hervorragend !
Vielen Dank für die Mühe, die Sie sich in Ihren Darstellungen geben.
Ich habe etwas gelernt und es hat mir geholfen.

Vielen DANK

hochachtungsvoll

Ingo

Me: Bitte gerne!





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Seite: games-calculator-01_ge.htm
Datum: 2018.08.28 12:58:54 (UTC+1)
Name: Doringer

Kommentar:
Spiel 'Rechenspiel' gemeistert in 25.672s. Schwierigkeitsgrad: Mittel, Rechenoperator: Addition

4x vertippt ! :-(

Me: ...auch die Hirn-Hand-Koordination kann man mit diesen Spielchen trainieren ;-)

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Page: technics-base-circuits-encoder-disc_en.htm
Date: 2018.08.25 09:13:31 (UTC+1)
Name: ted spark

Comment:
I try to compile printer.c . But it was not successful. So i would like to know how to compile in proper way.

Me: If you don't tell me EXACTLY what you have done and what error messages appear, I can't offer you any help. Would also be nice what download package you are talking about.


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Page: technics-base-circuits-encoder-disc_en.htm
Date: 2018.08.24 15:56:44 (UTC+1)
Name: gustavo nevarez

Comment:

an absolute encoder of 5 bits could be used in an arduino, to know the position in degrees of the movement of a lever and to control 2 relay outputs. the concept would be that turning the lever to the left activates an output of the relay and turning it to the right control the other relay output and know the position of the lever at each moment the movement would be in the range of 0 to 180 degrees.

Me: Is this comment meant as a question or did you just want to throw in your idea?

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