Ir remote receiver and transmit the same signal

Status
Not open for further replies.
Les Jones said:
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.
Click to expand...
My set top box uses ir remote. Is that enough for it to work?
Do I need to set the frquency of ir?
 
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 ..
 
Last edited:
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
 
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.
 
audioguru said:
The first circuit with the TSOP1738 IR receiver IC works only at 38kHz
Click to expand...

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.
 
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?
 

Attachments

  • Tsop.png
    59.4 KB · Views: 121

They aren't particularly narrow, so work without any problems.
 
Status
Not open for further replies.

Similar threads

N
  • Question
Make signal lights for the AC outlet
Replies
12
Views
2K
ZipZapOuch
C
  • Question
Using Handheld PC as universal remote
Replies
4
Views
1K
Lightium
P
  • Locked
  • Question
Modify circuit to power on/off Attiny85 by remote
Replies
16
Views
3K
Nigel Goodwin
S
  • Question
ir signal generator
2 3
Replies
41
Views
14K
Tony Stewart
J
  • Question
Logarithmic amplifier design for measuring the ON voltage of a GaN transistor / Schematic, Ideas and LTspice simulations available
Replies
9
Views
4K
Tony Stewart
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…