I'm trying to reverse engineer the mini RF, 1 way transceiver, modules H34A and H3V4F, unfortunately the main IC has no marking or letters. I also tried to find the schematic with no luck.
Does anyone know their main IC components spec sheet or the schematic, or any similar mini SMT component RF module schematic?
I already know the ht12e IC, but if prefer something that simpler and small like the H34A...
Thanks in advance.
Frankly, I am shocked that you are asking our help to STEAL another engineer's design !
Have you no HONOR or shame ?
SHAME ON YOU !
We are engineers. We HATE people like you !
If that was your design would you want someone like you trying to steal it ?
Not that it matters but WHY are you trying to reverse engineer it ?
Go away !
The IC might depend on what frequency your using but it looks like a MICRF113 might be the chip your looking for. You will probably find the H34A schematic will match the reference design in the datasheet.
Gasp and horror, raschemmel, he's going to rip off the board design... which was in turn cribbed from the reference design in the datasheet.... rolleyes This is the usual integration of breakout boards based on reference designs into a single dedicated board, like people here do all the time.
Why do you want to reverse engineer THOSE modules though? Why not copy something that, you know, doesn't suck? I haven't tested the H3V4F, but it looks almost identical to the H5V4D - which performed miserably in my tests - It wouldn't even work from across the street.
The RXB12 is an excellent receiver, based on the SYN470, which has a nice datasheet detailing how to use it and the reference design is pretty easy to follow. I made a transmitter/receiver based on the SYN470 and SYN115 like 2 years back (when I was not as good at circuit design as I am now) and they worked fine; the transmitter was comparable to the commercial SYN115 modules I had (which were, IIRC, marginally better than H34A), and the receiver was only 15% worse, despite the matching network being well off the mark.
Gasp and horror, raschemmel, he's going to rip off the board design... which was in turn cribbed from the reference design in the datasheet..
Well then I guess I have to ask what he is doing here if he can get it from the reference design in the datasheet ?
raschemmel:
Well then I guess I have to ask what he is doing here if he can get it from the reference design in the datasheet ?
Because he doesn't know what the part is that he needs to pull the datasheet for? (it's in SOT-23-6, if it's the same one as the H5V4D, so the markings on the chip are insufficient to identify it) I mean, that's what he's asking....
“reverse engineer ”
Collateral Damage
Friendly Fire
Sale
Special
New and Improved.
Your call is important to us.
Your privacy is of utmost importance.
Trust us.
Misinformation
Genuine Imitation Leather
Neutralized
Enhanced Interrogation Methods
Economically Disadvantaged
Euphemisms makes it all okay 
.
Oh you english language, we can make anything sound so nice.
Any way you cut the cake, reverse engineering someone else's product design is stealing.
An honest person would design their own, instead of taking advantage of someone else's work.
I hope his product doesn't work.
Oh you
englishEnglish language, we can make anything sound so nice.
English as a proper noun for the people of England, or the language which bears its name, should always be capitalized.
Should the word english be Capitalized ?
You're right. "Reverse engineeriing" sounds so benign...
Why doesn't he just say the truth ?
"I'm a lazy no good plagiarizer and I need help stealing someone else's design ...because I have no
knowledge or talent of my own..."
Oh you ~~ e ~~ English language, we can make anything sound so nice special.
You can't hit the pool ball directly, but maybe if you give it some english. 
Riva:
The IC might depend on what frequency your using but it looks like a MICRF113 might be the chip your looking for. You will probably find the H34A schematic will match the reference design in the datasheet.
Thanks Riva, that's what I needed, a little reference to start, googling micrf113 I found an article of digikey about "designing tx communications" with multiple Rx Tx schematics using different provider IC's, plentiful of information.
Thanks.