Discussion in "Electronics" started by    dexter_a    Sep 6, 2014.
Sat Sep 06 2014, 03:07 PM
#1
Hello guys I've a doubt regarding IR sensing circuit, I have a IR Transmitter LED and IR Receiver LED . But my circuit which is to detect interruption of ir signal to receiver does not work. I was wondering if there's a difference between the ordinary IR LED Receiver Pair and TSOP1738 - Infrared Sensor .





Thanks
Arul


[ Edited Sat Sep 06 2014, 03:08 PM ]
Thu Sep 11 2014, 04:36 AM
#2
TSOP is a photo transistor + demodulator combo chip which removes your carrier from the data signal and give you output data directly. where as IR LED receiver is nothing but a photo diode (usually) or a photo transistor. If you're using a photo diode then I would recommend you using a photo transistor which can give you better performance + range.

Apart from this we have similar project in our download section you can use the same detector circuit that is used in the project. It will make things simpler. rest is your coding

PS: Do not forget to share your project with us.
Thu Nov 27 2014, 05:23 AM
#3
there are two types of diodes ir rx which is coated with black and the ir tx which is transparent. But you will need the reverse bias the ir rx to make it work.

http://forum.allaboutcircuits.com/threads/need-help-for-infrared-indicator.73868/

check for schematic

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Thu Nov 21 2019, 12:30 PM
raj2555
how to interface 8051 microcontroller with NRF24L01+ module
ExperimenterUK
Sat Oct 12 2019, 10:23 PM
Log in.. then post your code in the 8051 forum
Sat Oct 12 2019, 10:18 AM
Bhadra Sajikumar
i am doing a countdown timer with 8051 for my project, unfortunately our professor had to take a leave of absence before he could teach us most of it.. can someone explain the .asm code of it for me?
Mon Sep 23 2019, 07:37 AM
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I am doing a project for my schools wireless security system with cameras,sensors and spot lights using 8051 micro controller, could you help me out with the design and its source code.
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Thank you for your time,
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@Ismail ..post in forum, give details
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Hello. Please I won't download
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@BUSTER123 Please post in the forum
Tue Jul 23 2019, 06:13 PM
BUSTER123
hello! newbie here. i am kind of a guy who hates using ready - made existing libraries, so this helped a lot as i was trying to control and write to a character lcd display. however, i can't figure out how to set the cursor position. for example, i want to set it to the 5th column in the first row, so position 5. so according to the table, i am sending 10000101 on the 8 data lines of the lcd (register select pulled low). the cursor does not move there however. and i cant move the cursor left or right too. is it something wrong that i am doing? thank you.
ExperimenterUK
Thu Jul 11 2019, 07:55 PM
@ramos https://www.theengineeringprojects.com/2017/09/l298-motor-driver-library-proteus.html

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