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Page: technics-base-circuits-transmissive-optical-sensors_en.htm
Date: 2023.05.25 04:56:09 (UTC+1)
Name: Tom flash
Comment:
Hi
What if i connect optical sensor without resistance it will broke them right?
Me: Hard to give a correct answer until you don't say what optical sensor you have in mind (my crystall ball is broken).
In general, the chances are high that they get damaged.
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Page: technics-base-circuits-transmissive-optical-sensors_en.htm
Date: (UTC+1)
Name: Karredpool
Comment:
Ich benutze seine Scheibe, aber ich habe sie schwarz gestrichen und in 6 Schritte unterteilt, weil auf seinen 3000 Zeilen zu viele erschienen.
Me: Wie in Abbildung 16 im Kapitel zu optischen Sensoren beschrieben, funktionieren diese Sensoren meistens nur mit der originalen Sensorscheibe. Dein Sensor scheint solch ein Bauteil zu sein.
Du kannst aber zwei normele optische Sensoren nebeneinander verwenden, wenn du nur eine geringe Auflösung benötigst. Das habe ich im in einem weiteren Kapitel beschrieben.
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Page: technics-base-circuits-transmissive-optical-sensors_en.htm
Date: (UTC+1)
Name: karredpool
Comment:
Hallo !!, Vielen Dank für Ihre schnelle Antwort.
Nun, wenn man die Operation gut beobachtet, funktioniert es wie folgt:
Wenn sich die codierte Platte in eine Richtung dreht und der Sensor unterbrochen wird, ist die Spannung "hoch".
im Gegenteil, wenn sich die codierte Platte in die entgegengesetzte Richtung dreht, ist die Spannung "niedrig".
Das Gerät hat 2 Kanäle und beide verhalten sich gleich, wenn der Sensor unterbrochen wird.
Nochmals vielen Dank und viele Grüße.
Me: Verwendest du die originale Sensorscheibe?
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Page: technics-base-circuits-transmissive-optical-sensors_en.htm
Date: 2020.10.12 13:04:21 (UTC+1)
Name: karredpool
Comment:
Hallo nochmal und Entschuldigung für den vorherigen Kommentar. Es ist übersetzt, daher weiß ich nicht, wie der Text aussehen wird. :) :)
Ich habe einen Epson-Druckersensor, der immer Spannung durch die Sensorkabel sendet und die Spannung verringert, wenn ich den Lichtstrahl unterbreche. Ist es möglich, dass es das Gegenteil von dem ist, das Sie in Ihrem Video zeigen?
Dankeschön.
Me: So ganz gut klappt das mit den automatischen Übersetzungen leider nicht. Soll das bedeuten, dass an dem Ausgang 5V anliegen wenn der Lichstrahl nicht unterbrochen ist und 0V, wenn der Lichtstrahl unterbrochen ist?
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Page: technics-base-circuits-transmissive-optical-sensors_en.htm
Date: 2020.10.11 20:35:40 (UTC+1)
Name: karredpool
Comment:
hola que tal ??
tengo un sensor de impresora Epson, siempre manda tension por los hilos de los sensores y corta la tension cuando interrumpo el haz de luz. es posible que sea al contrario del que usted muestra en su video??
Gracias.
Me: Wie ich deutlich geschrieben habe, beantworte ich Kommentare nur in deutscher oder englischer Sprache.
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Page: technics-base-circuits-transmissive-optical-sensors_en.htm
Date: 2020.03.10 18:17:25 (UTC+1)
Name: David Gray
Comment:
Great! That looks EXACTLY like the one from a printer that I was trying to decipher. Thank you.
Me: You're welcome!
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Page: technics-base-circuits-transmissive-optical-sensors_en.htm
Date: 2020.01.27 23:55:03 (UTC+1)
Name: Ragnar Már
Comment:
you are fantastic! Thanks for all of this...
Me: You're welcome!
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Page: technics-base-circuits-transmissive-optical-sensors_en.htm
Date: 2019.09.03 11:14:43 (UTC+1)
Name: Ted
Comment:
Thank you for the information you provide.
I have a question please bear with me since I don't understand this very well.
In the 6 pins sensor Can I connect either A or B to a GND?
I want to use the sensor as a switch is there a better way?
Thanks in advance.
Me: A and B are output channels. They should never be connected directly to ground since this will very likely destroy the sensor. A and B must be connected to the (high resistance) inputs of a microcontroller or a similar computing device.
The sensor can't switch lots of power (just one milliamp or so, see the datasheet for details). You must insert a mostfet between ouput A or B and the load to switch.
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Page: technics-base-circuits-transmissive-optical-sensors_en.htm
Date: 2019.08.04 11:43:45 (UTC+1)
Name: Eiko
Comment:
Thank you very much! That was helpful.
One question remains, Why did the sensor get destroyed while de-soldering? I have a sensor and need it for a project, I really don't want to lose it :(
should I try de-soldering it and hope for the best? I am gonna kill my boss in the end if it got fried.
Me: I ripped off a pin on my sensor because of the tight trough-hole mount. If the sensor is on a small board with nothing but the needed series resistors on, it is for sure better not to desolder the sensor. You can also try to get it off carefully by cutting the board with a tiny grinder disc on a Dremel.
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Page: technics-base-circuits-transmissive-optical-sensors_en.htm
Date: 2019.01.05 03:23:52 (UTC+1)
Name: Hernan
Comment:
Hi, i have this encoder https://www.google.com.ar/search?q=encoder+incremental+arduino&prmd=ivsn&source=lnms&tbm=isch&sa=X&ved=2ahUKEwjstqjmr9PfAhWSl5AKHSgQDxUQ_AUoAXoECBIQAQ&biw=360&bih=560#imgrc=Ndse2ofkNpCbdM
and I can not make it work, can you help me?
Me: Read the datasheet?
...and read all of chapter contact.
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Page: technics-base-circuits-transmissive-optical-sensors_en.htm
Date: 2018.05.02 08:55:41 (UTC+1)
Name: Rodrigo
Comment:
Hi, Thanks for all the information.
I was watching the Transmissive optical sensors project and i actually have the HP encoder of the figure 1 (Of the project) but i don´t know how to use and there's no information in the page about this model.
I really apreciated if you can help me.
Thank, and nice job!!
Me: There is more than one HP sensor in Figure 1 and there is lots of information on the page how to find out how to use an unknown sensor. Follow my instructions to get the pin layout or at least tell me about your measurement results to get a better answer, because I am no mentalist ;-)
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Page: technics-base-circuits-transmissive-optical-sensors_en.htm
Date: 2018.01.20 06:59:14 (UTC+1)
Name: seamiki
Comment:
A quick tip for making encoder wheels: the wheel can be drawn using processing, exported as pdf and printed from a laser printer on transparent foil.
Results are cheap, quick and very precise.
Hope it will be useful for someone as it is to me.
Brgds.
Me: For those that don't not know about "Processing", it is a free software available at https://processing.org/.
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Page: technics-base-circuits-transmissive-optical-sensors_en.htm
Date: 2017.08.29 07:11:10 (UTC+1)
Name: Thomas
Comment:
Your site has always been an insiration to me. i wish to share this article with others looking for info on this topic.
http://ichiro-maruta.blogspot.com.au/2010/02/blog-post.html
Apologies if this is an inappropriate
Me: Yes, the gray scale encoder might be an option for your project if you need absolute positioning. The automatic English translation is here.
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Page: technics-base-circuits-transmissive-optical-sensors_en.htm
Date: 2017.03.22 00:31:03 (UTC+1)
Name: sohaib
Comment:
thank you so much :D
Me: You're welcome!
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Page: technics-base-circuits-transmissive-optical-sensors_en.htm
Date: 2016.12.08 15:46:48 (UTC+1)
Name: Ned
Comment:
Dear Norbert,
Thank you for this excellent and very useful post.
Any idea how common 3.3V sensors are in printers of recent vintage? I've salvaged several (Canon & HP) that work fine on 3.3V. I'd prefer to drive them at 5V, but don't want to fry them if I can avoid it. Do you know of a non-destructive test to figure out (or guess intelligently) the maximum voltage a salvaged sensor can handle?
Thanks and regards,
Ne
Me: All sensors I have salvaged from printers so far (Canon, HP and Lexmark) work fine with 5V. Sorry, but I don't know about a non-desturctive test other than reading the datasheet (if you find those for your sensors).
3.3V is not that common in printers. The thing is that 5V sensors usually start working fine at 3.3V, thus the chances are low to fry your's at 5V.
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Page: technics-base-circuits-transmissive-optical-sensors_en.htm
Date: 2016.06.09 18:45:37 (UTC+1)
Name: seamiki
Comment:
Good evening Mr Norbert, as anyone of your followers I found myself playing with rotary encoders scavenged from old printers.
A quick, empirical solution I came with at the time, was to look at the emitter through the phone camera (any digital camera will do)while touching its terminals with ground and 5v via 2.2k resistor.
If the led (IR, that's the reason of the camera) switches on mark the polarity. From there the sensor pinout is staight forward.
Thank you for this awesome chapter.
Me: A simple and quick way to find the correct pinout. Thanks for sharing your ideas!
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Page: technics-base-circuits-transmissive-optical-sensors_en.htm
Date: 2016.05.25 15:43:00 (UTC+1)
Name: Iranian
Comment:
Germans are cool people.
thank you
Me: You're welcome!