Ir remote receiver and transmit the same signal

[Mindmywork]

You will need to check the specifications for the protocol used by your set top box and confirm that the components you choose in your design meet those specifications. You should find a design that meets your needs with Google.

Les.

My set top box uses ir remote. Is that enough for it to work?
Do I need to set the frquency of ir?

 

[ericgibbs]

I

I'm from India. Can't buy it.

OK,
Do you have access to eBay.?
https://www.ebay.co.uk/bhp/marmitek-powermid#

Is it possible that you could use a cable link from one room to another, not using RF radio.?

E

 

[Mindmywork]

I have two TVs. Want to connect a single set top box connection for two tvs with a cable.
When one Tv is not in use I can able to watch shows on another Tv with this ir extender.
Two TVs are in two different rooms ..

 

[ericgibbs]

hi,
I would consider a simple cable link between the two TV's.
At one end would be a IR receiver and at the other a IR emitter.
So any signal from the remote control would be detected by the receiver and relayed to the IR emitter,via the wire, which will be located so that the IR output can be detected by the TV box.

 

[Mindmywork]

hi,
I would consider a simple cable link between the two TV's.
At one end would be a IR receiver and at the other a IR emitter.
So any signal from the remote control would be detected by the receiver and relayed to the IR emitter,via the wire, which will be located so that the IR output can be detected by the TV box.

Im not able to understand

 

[ericgibbs]

Like this image.

 

[Dr_Doggy]

http://www.cedarnet.org/smartware/Hardware/IR_Repeater/HobbyIRRepeat.png

... the first half of the circuit may change depending which IR sensor you have.

 

[Mindmywork]

http://www.cedarnet.org/smartware/Hardware/IR_Repeater/HobbyIRRepeat.png

... the first half of the circuit may change depending which IR sensor you have.

Thanks. Now I got it.
Isn't this two circuits same

 

[audioguru]

The first circuit with the TSOP1738 IR receiver IC works only at 38kHz (IR remote controls operate on about 6 different frequencies) and is very sensitive.
The second (Hobby IR Repeat) will pickup IR interference from sunshine and compact fluorescent light bulbs and has very poor sensitivity.

Look at the datasheet of a TSOP IR receiver IC to see everything it does.
EDIT: Sorry, I have never seenspecs for the Sharp IR receiver IC in the first circiuit and it might work but it will probably pickup interference.

 

[Mindmywork]

The first circuit with the TSOP1738 IR receiver IC works only at 38kHz (IR remote controls operate on about 6 different frequencies) and is very sensitive.
The second (Hobby IR Repeat) will pickup IR interference from sunshine and compact fluorescent light bulbs and has very poor sensitivity.

Look at the datasheet of a TSOP IR receiver IC to see everything it does.
EDIT: Sorry, I have never seenspecs for the Sharp IR receiver IC in the first circiuit and it might work but it will probably pickup interference.

That's good to know.
Gp1u52x is not available but TSOP is.
How to know my remote operating frequency.
Or can I adjust the frequency in circuit.

 

[Nigel Goodwin]

The first circuit with the TSOP1738 IR receiver IC works only at 38kHz

Not at all, they work over a fairly wide range of frequencies, although sensitivity is slightly reduced when used on a different frequency.

As a service engineer, I only ever stocked one type for replacement purposes, and all repairs worked perfectly to well above their design range.

 

[audioguru]

I guess the IR receiver ICs are made in many frequencies with a fairly narrow bandpass for fun?
You cannot change the frequency, you buy which frequency you want. Maybe these IR receiver ICs that have the narrow carrier filter are not used in an IR repeater?

 

[Nigel Goodwin]

I guess the IR receiver ICs are made in many frequencies with a fairly narrow bandpass for fun?
You cannot change the frequency, you buy which frequency you want. Maybe these IR receiver ICs that have the narrow carrier filter are not used in an IR repeater?

They aren't particularly narrow, so work without any problems.

 

[Mindmywork]

They aren't particularly narrow, so work without any problems.

So the above said circuits work for any remote??

 

[Nigel Goodwin]

So the above said circuits work for any remote??

Pretty well, the main exception been old B&O, who rather bizarrely used to use 100KHz carrier.