Digital Line Following Sensor

Model : ROB-00016

Supplier : Techshop Bangladesh

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A pack of IR sensors with digital output. Specially made for Line Following Bot.


This sensor package is for line following Bot. Now and then hobbyists who are willing to play with Line following Robot face a tough time with the IR sensor arrangement. This is a neat solution for them.

Two LTH-1550 reflective object sensors have been used here. The LM358 dual OPAMP works as a comparator with two reference voltages set by two POTs.The sensors have 0.5-inch spacing.


Calibration: To calibrate the sensors, you must tune the respective POTs.The left POT is connected to SEN1 and the right POT is connected to SEN2. Connect VCC and GND pins with the power supply and connect SEN1 and SEN2 pins with two LEDs.Keep tuning the POTs until the LEDs glow.

Now, draw a Black line on white paper or vice versa. After the proper calibration is done, the LEDs will turn on when the sensors trace black and they will turn off when the Sensors trace white. That means the output is always either 1(High) or 0(Low) just as the word 'digital' indicates. 

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Shparvez001 | Sep 19,2012 at 11:33 PM
Ashte ashtei sold???

Koyta ansilen???
Fahad | Sep 20,2012 at 11:14 AM
We made one piece of that for public response. And now it seems we need to make lot more than one :)
If you need urgently let us know.
Sunandita_sarker | Sep 21,2012 at 10:42 PM
Vaiya, dui ekta 5 sensor pack banate paren. For better resolution.:)
Fahad | Sep 22,2012 at 07:27 PM
We already made that. Will up asap! :)
Sunandita_sarker | Sep 26,2012 at 06:27 PM
I bought this item. Plz tell me which connector of your site i can use to connect it? And eagerly waiting for the 5 sensor pack!! :D
Fahad | Oct 3,2012 at 01:19 PM
You can use this connector:
Anikpro | May 9,2013 at 10:49 PM
Can use 6 pin instead of 8 pin. Like this -
Fahad | May 11,2013 at 11:44 PM
yes you can.
Anikpro | May 10,2013 at 08:45 AM
কাল রাতেও দেখলাম দুইটা আছে। আজ সকালেই নাই..................
Anikpro | May 10,2013 at 08:48 AM
your site doesn't support bangla, so again i'm writing.
when this will be available? need one agently.
Anikpro | May 12,2013 at 05:53 AM
When will this available? Please reply urgently.
A.R | May 12,2013 at 12:39 PM
To make it easier to use for the newbies,we're trying to modify this product so that it gives digital output.We need some time to complete this modification and make this product available again.
Anikpro | May 26,2013 at 09:40 AM
What is supply voltage of this board? Is it +5volt?
A.R | May 26,2013 at 10:37 AM
Irfan00785 | Jun 20,2013 at 01:52 AM
The ADC output is very low.The difference in ADC value is very little for different color. Can u plz help at this.
A.R | Jun 20,2013 at 09:53 AM
This is what we're trying to improve in our next version.
Anikpro | Jul 15,2013 at 01:18 PM
At 12 may,2013 you told me that you were trying to improve this. Now it is 15 july. How long will next version take to come? This act isn't seem to be professional, is it?
A.R | Jul 31,2013 at 10:22 PM
It's available now.We're extremely sorry for the delay.
Kocchop | Oct 27,2013 at 08:02 PM
When This will be available again?? Need this urgently...
Mehraz | Oct 16,2014 at 09:34 PM
ei circuit diye line following robot kivabe banabo ? please bolen.
A.R | Oct 19,2014 at 10:05 AM
You can get the basic idea from here.
Mdarnob | Nov 10,2014 at 11:16 AM
does it need ir sensors?
A.R | Nov 10,2014 at 04:03 PM
IR sensors are already in this board!
Mashnoor | Nov 12,2014 at 11:38 AM
What is the difference between this sensor and IR Sensor Array5? Is the next one a analog IR sensor?
A.R | Nov 13,2014 at 10:31 AM
This one has two IR TX-RX pairs, that one has five. That one gives analog output, this one gives digital.
Mashnoor | Nov 15,2014 at 10:28 AM
When it will be available?
Muhaiminul92 | Jan 29,2015 at 02:15 AM
Please ekta help korben.. ei sensor ta use kore LINE follower er jonno code ta kivabe ligbo just sensor ta read korar code ta keo bole den..pls
A.R | Jan 29,2015 at 09:57 AM
Video Tutorial is given in the 'documents' section. Please check.
Istiack | Feb 8,2015 at 11:25 AM
ব্যাটারি আর মটর কানেক্ট করার নিয়মটা কিভাবে। পোটতো চারটা।
A.R | Feb 8,2015 at 02:47 PM
ব্যাটারি আর মোটর এর সাথে কানেক্ট করার কথা কে বলেছে? ডকুমেন্টস সেকশনে স্পষ্ট ভিডিও টিউটোরিয়াল দেওয়া আছে। দয়া করে দেখে নিন।
Navidahmed | Nov 7,2016 at 03:30 PM
Md.Masud | Apr 19,2015 at 01:35 PM
এখানে সেন্সর ১এবং সেন্সর ২ এর আউটপুট সবসময় +৫ ভোল্ট দিচ্ছে,,,,, লাইন ফলো ছাড়াই :O
A.R | Apr 19,2015 at 04:45 PM
পটগুলো টিউন করুন দয়া করে।
Saqib11 | Nov 18,2015 at 09:50 PM
can i connect it's outpin to L293D IC?
A.R | Nov 19,2015 at 09:40 AM
May We know why should you connect it to L293D???? This is a SENSOR which should be connected to MCU so that the MCU can take input and make decision.
Saqib11 | Nov 20,2015 at 09:58 AM
I want to make a line following robot .......and it a analog circuit that's why.....The circuit is based on L293D IC
A.R | Nov 22,2015 at 09:57 AM
L293D has 4 Inputs. This one has 2 outputs. So, no it will not complete your circuit.
Bobseee | Aug 9,2016 at 07:40 PM
recently I've purchased this module from u. My purpose is different. I need slightly better range. What modification I have to do?
FAHIM_REAZA | Aug 11,2016 at 09:29 AM
Dear customer,
For maximum range of detection, you can use "IR Infrared Obstacle Sensor". It may solve your purpose.
Mohammed_Nazrul_Islam | Jun 10,2017 at 04:05 PM
Can you give me the code for line following robot (for this sensor) for uploading in arduino?
A.R | Jun 11,2017 at 09:36 AM
No. Sorry. Please get idea from the video which has been shown with PIC microcontroller. Principle is same.
RayeedR | Sep 3,2019 at 01:16 PM
Can we use this as a basic photo-transistor? What is the voltage swing for this from logic 0-1?
A.R | Sep 5,2019 at 03:42 PM
No. This cannot be used as photo transistor.

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