OK...another question
IS THERE ANY TSOP THAT WOULD NOT DETECT 38 kHZ(TV REMOTE) FREQUENCY???

 

hi opus.
You are confusing IR energy detection with Coded IR signal recognition.
Did you read that PDF I posted.???
E

 

hi opus.
You are confusing IR energy detection with Coded IR signal recognition.
Did you read that PDF I posted.???
E

Yes,but to be honest i do not understand much.I want to detect frequency of lets say 30 kHZ ignoring all other frequencies.

 

Can't you use coded addresses to get the selectivity you want? That's how TV's and other remotes know which button has been pressed.

 

hi,
OK, Post the details of any modulation you are applying to the 30KHz IR beam.
E

 

Yes,but to be honest i do not understand much.I want to detect frequency of lets say 30 kHZ ignoring all other frequencies.

Sorry, I responded before seeing several of the replies. I do not believe the IR device you are using allows detection of the modulation frequency. If you want to do that, you could use a simple IR detector, but it will be more complicated.

 

OK...another question
IS THERE ANY TSOP THAT WOULD NOT DETECT 38 kHZ(TV REMOTE) FREQUENCY???

TSOP stands for Thin Small Outline Package. You are using the term to describe the function of the silicon inside the package.
It might be possible to use an IR detector and look at the actual modulated signal. We never did that; we only looked at the presence or absence of modulation.

 

The way to avoid responding to other remotes is to use a data protocol. This is how various remotes can operate on the same frequency without interfering. You can send a specific code that must be recognized before you respond. Of course this pretty much requires microcontrollers in both transmitter an receiver.

Bob

 

Thank you guys!
I am aware that microcontrolers should be used for proper functioning protocol between transmiter and reciver,but i do not have programing knowledge yet.I am using two 555 timer for creating 30 kHZ in bursts.I menaged to comunicate between transmiter and reciver on distance aprox 10 m and i am good with that.Problem is that i want to my transmiter acts as remote controler on frequency 30 kHZ and would not be interupted with TV remote control.It would be cool if my transmiter would be unique for lighting up an led with on/off button.

 

hi optus,
Would this type of IC be suitable for your project
E

 

hi optus,
Would this type of IC be suitable for your project
E

Thank you Eric...this could work.Only thing is that schematic represent an RF comunication and i need IR.I am not sure how to incorporate that on this chip.

 

Thank you Eric...this could work.Only thing is that schematic represent an RF comunication and i need IR.I am not sure how to incorporate that on this chip.

Check the function of pin 16:

 

I am trying to find this product online but witouth sucess.On the manufacturer's page this product is unavailable

 

hi
Look here
note the HT6221 6222 are equivalent.
E
https://www.sunrom.com/p/ht6221a-ht6221-soic-20-nec-remote-ic

 

HT12A with HT12D would do the job but I am not sure the HT12A is still around.
[EDIT] it is on ebay.

 

When i consider things a bit beter i think that these two chips are not good idea because on the reciever side i must include some of the TSOP'S and they will(again) detect a wide range of frequencies and my goal is to operate at one frequency only.

 

Yes,but to be honest i do not understand much.I want to detect frequency of lets say 30 kHZ ignoring all other frequencies.

Yes is you feed the signal into a Phase Locked loop chip, and set it to 30khz lock frequency...

 

How many receivers to you need to address independently? How many functions on each receiver do you need to control? (I suspect just one.)

 

When i consider things a bit beter i think that these two chips are not good idea because on the reciever side i must include some of the TSOP'S and they will(again) detect a wide range of frequencies and my goal is to operate at one frequency only.

It won't matter if the TSOP receives the signal as the decoder will reject everything except the code it is expecting.

 

It won't matter if the TSOP receives the signal as the decoder will reject everything except the code it is expecting.

Thank you...as i said before i dont know too much about this subject but with every question there is some answer and i can learn more and more.