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. 

Question & Answer

Total 24 questions

Q: Ashte ashtei sold??? Koyta ansilen??? Questioned by shparvez001, 19-Sep-2012

Q: 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. Questioned by Fahad, 20-Sep-2012

Q: Vaiya, dui ekta 5 sensor pack banate paren. For better resolution.:) Questioned by sunandita_sarker, 21-Sep-2012

We already made that. Will up asap! :) Answered by Fahad, 22-Sep-2012 19:27 PM

Q: 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 Questioned by sunandita_sarker, 26-Sep-2012

You can use this connector: Answered by Fahad, 03-Oct-2012 13:19 PM

Q: Can use 6 pin instead of 8 pin. Like this - Questioned by anikpro, 09-May-2013

yes you can. Answered by Fahad, 11-May-2013 23:44 PM

Q: কাল রাতেও দেখলাম দুইটা আছে। আজ সকালেই নাই.................. Questioned by anikpro, 10-May-2013

Q: your site doesn't support bangla, so again i'm writing. when this will be available? need one agently. Questioned by anikpro, 10-May-2013

Q: When will this available? Please reply urgently. Questioned by anikpro, 12-May-2013

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. Answered by A.R, 12-May-2013 12:39 PM

Q: What is supply voltage of this board? Is it +5volt? Questioned by anikpro, 26-May-2013

Yes. Answered by A.R, 26-May-2013 10:37 AM

Q: The ADC output is very low.The difference in ADC value is very little for different color. Can u plz help at this. Questioned by irfan00785, 20-Jun-2013

This is what we're trying to improve in our next version. Answered by A.R, 20-Jun-2013 09:53 AM

Q: 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? Questioned by anikpro, 15-Jul-2013

It's available now.We're extremely sorry for the delay. Answered by A.R, 31-Jul-2013 22:22 PM

Q: When This will be available again?? Need this urgently... Questioned by Kocchop, 27-Oct-2013

Q: ei circuit diye line following robot kivabe banabo ? please bolen. Questioned by mehraz, 16-Oct-2014

You can get the basic idea from here. Answered by A.R, 19-Oct-2014 10:05 AM

Q: does it need ir sensors? Questioned by mdarnob, 10-Nov-2014

IR sensors are already in this board! Answered by A.R, 10-Nov-2014 16:03 PM

Q: What is the difference between this sensor and IR Sensor Array5? Is the next one a analog IR sensor? Questioned by mashnoor, 12-Nov-2014

This one has two IR TX-RX pairs, that one has five. That one gives analog output, this one gives digital. Answered by A.R, 13-Nov-2014 10:31 AM

Q: When it will be available? Questioned by mashnoor, 15-Nov-2014

Q: 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 Questioned by Muhaiminul92, 29-Jan-2015

Video Tutorial is given in the 'documents' section. Please check. Answered by A.R, 29-Jan-2015 09:57 AM

Q: ব্যাটারি আর মটর কানেক্ট করার নিয়মটা কিভাবে। পোটতো চারটা। Questioned by istiack, 08-Feb-2015

ব্যাটারি আর মোটর এর সাথে কানেক্ট করার কথা কে বলেছে? ডকুমেন্টস সেকশনে স্পষ্ট ভিডিও টিউটোরিয়াল দেওয়া আছে। দয়া করে দেখে নিন। Answered by A.R, 08-Feb-2015 14:47 PM

hahahahhahahahha..........:D Answered by Navidahmed, 07-Nov-2016 15:30 PM

Q: এখানে সেন্সর ১এবং সেন্সর ২ এর আউটপুট সবসময় +৫ ভোল্ট দিচ্ছে,,,,, লাইন ফলো ছাড়াই :O Questioned by Md.Masud, 19-Apr-2015

পটগুলো টিউন করুন দয়া করে। Answered by A.R, 19-Apr-2015 16:45 PM

Q: can i connect it's outpin to L293D IC? Questioned by saqib11, 18-Nov-2015

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. Answered by A.R, 19-Nov-2015 09:40 AM

Q: I want to make a line following robot .......and it a analog circuit that's why.....The circuit is based on L293D IC Questioned by saqib11, 20-Nov-2015

L293D has 4 Inputs. This one has 2 outputs. So, no it will not complete your circuit. Answered by A.R, 22-Nov-2015 09:57 AM

Q: recently I've purchased this module from u. My purpose is different. I need slightly better range. What modification I have to do? Questioned by bobseee, 09-Aug-2016

Dear customer, For maximum range of detection, you can use "IR Infrared Obstacle Sensor". It may solve your purpose. Link: Answered by FAHIM_REAZA, 11-Aug-2016 09:29 AM

Q: Can you give me the code for line following robot (for this sensor) for uploading in arduino? Questioned by Mohammed_Nazrul_Islam, 10-Jun-2017

No. Sorry. Please get idea from the video which has been shown with PIC microcontroller. Principle is same. Answered by A.R, 11-Jun-2017 09:36 AM

Q: Can we use this as a basic photo-transistor? What is the voltage swing for this from logic 0-1? Questioned by RayeedR, 03-Sep-2019

No. This cannot be used as photo transistor. Answered by A.R, 05-Sep-2019 15:42 PM

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