IR receiver TSOP34838 problem

[aleksaZR]

I've been playing with the TV remote control, capturing the data sent.
This is my second try, btw. Last time was two years ago, and now I'm failing at the same place...

As shown here, RC-5 remote repeats a code every 114ms.
That works, every 110ms I get something...

That something should be 14 bits, lasting 25ms, but I only get a few 1s and 0s lasting less than 2ms.
(see picture)

I'm using TSOP34838. On the second page of that PDF there is an APPLICATION CIRCUIT, quite simple.
I've used 100E and 4u7 for R1 and C1.
I've tried two TSOP34838s, both (not) working the same.

The circuit is simple, but is not working and I have no idea why...
Anyone had a similar experience?

 

[nandhu015]

TV Remote is common description. Be specific.

Your sensor seems to be working fine, Your remote may be using different protocol..

 

[aleksaZR]

You were right, the remote uses ITT protocol which doesn't use modulation.
Someone suggested that I should sample both TX and RX diodes, see picture.
Luckily, the remote is a universal one, so I'll look for a code that uses RC-5.

 

[aleksaZR]

OK, found an RC-5 code on my remote, and immediately found my next problem

RC-5 sends 0 as 10, and 1 as 01. So 00 and 11 should not exist, right?
Even though I've pressed a key several times, I always get C1 to be 11, and either S2 or T to be 00.
Why is that?

 

[hexreader]

Answer is on your other post here:

https://forum.allaboutcircuits.com/showthread.php?t=95577