Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

questions about TSOP or IR receiver modules

Status
Not open for further replies.
Y

yes_secreto

Newbie level 5
Newbie level 5
Joined
Jan 23, 2012
Messages
10
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,355
Does TSOP 1738 modules only detects modulated IR or even the IR from sunlight and other devices??

Because my IR module detect ambient light and I thought it only outputs high when it receives 38KHz modulated IR...

plz help me...tnx
 

High is the normal idle state of TSOP1738.

The output will go LOW when it receives 38KHz IR, but only for a short time, as there is a maximum mark time (see the data sheet).

The receiver is good at rejecting ambient light and sunlight, within reason.
 

hexreader said:
High is the normal idle state of TSOP1738.

The output will go LOW when it receives 38KHz IR, but only for a short time, as there is a maximum mark time (see the data sheet).

The receiver is good at rejecting ambient light and sunlight, within reason.
Click to expand...

sori...but would it be good for outdoor use just using 38KHz modulated IR and a IR module Receiver w/o a decoder..??

38KHz modulated IR =========>>>>>========== TSOP1738
 

I have never heard of 38KHz IR being used outdoors, so I have no idea whether it would work. I suspect that direct sunlight might be too much for the receiver to cope with, but I really don't know.

When you say 38KHz modulated, I hope you mean modulated with something like a 500Hz square wave. That should work, or anything from about 100Hz to about 2KHz.

Steady 38KHz will not work.

Hope this helps
 
hexreader said:
I have never heard of 38KHz IR being used outdoors, so I have no idea whether it would work. I suspect that direct sunlight might be too much for the receiver to cope with, but I really don't know.

When you say 38KHz modulated, I hope you mean modulated with something like a 500Hz square wave. That should work, or anything from about 100Hz to about 2KHz.

Steady 38KHz will not work.

Hope this helps
Click to expand...

tnx sir...can you suggest anything that would work for me??
 

yes_secreto i am also working on a same project...

If you are using just 38Khz IR it will not do much... in fact i am just having a range of few cm's(1 - 2 cm's)
You have to modulate it on a 1Khz Carrier as stated in above threads..

By HexReader
I have never heard of 38KHz IR being used outdoors, so I have no idea whether it would work. I suspect that direct sunlight might be too much for the receiver to cope with, but I really don't know.

When you say 38KHz modulated, I hope you mean modulated with something like a 500Hz square wave. That should work, or anything from about 100Hz to about 2KHz.

Steady 38KHz will not work.
Click to expand...

This Circuit will help you..
This is having a good range around 2 to 3 m..
Just have a look on it..

This is what above post wants to say..
Capture.PNG
 

do a search for SIRC that should gve you the basics and if you get the right one a lot of fun and a lot of use Read your PM
 
Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top