Wd5501

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Hi to All
Can any one help me with recognising This IC?
PART No: WD5501
I could not find anything Usefull on the net!
The file attached , is a RF remote controller
Thanks.

 

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Last Edited: Mon. Jul 30, 2018 - 09:52 PM
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What do the 4 pushbutton do? What does the product you found it in do? Sometimes that can provide a clue

Jim

I would rather attempt something great and fail, than attempt nothing and succeed - Fortune Cookie

 

"The critical shortage here is not stuff, but time." - Johan Ekdahl

 

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Please Read: Code-of-Conduct

Atmel Studio6.2/AS7, DipTrace, Quartus, MPLAB, RSLogix user

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This four button remote, characterized for LiftMaster garage door products, has a MicroChip 12F635. Manages the rolling code encryption of the RF signal?

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Hi Jim ,
This is a simple 4 channel remote controller(Sender) , (No physical access to receiver)
I thought this IC might be an Encoder , but i have found nothing on the net! , all i have on the sender board is an IC(WD5501), push buttons , resistors ...

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Hi ,
The question is : how does this IC(WD5501) work? Is it an encoder? RF IC? Wrong part number? Any Datasheet?

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What is your goal with this?

 

  • You have a broken one, and are trying to fix it?
  • You are trying to "hack" it?
  • You are trying to copy the product?
  • or what?

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How about a photo of the back of the board?

 

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Well there are five push-switches, +12 ,  ground, and one last pin.  I assume that this is custom IC built for Yue Zhong and that the last pin (pin 6, I assume) is a signal that turns a radio transmitter off and on quickly in a pulse-coded pattern. 

  Put a scope probe on pin 6, and check for activity.  I assume that pin 4 is ground and pin 8 is Vcc, which could be the +12V silk-screened on the lower left.

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Simonetta wrote:
custom IC built for Yue Zhong

Very likely.

 

If not actually a custom chip, then a custom in-house marking - that you're not going to find on the public interwebs.

 

 a signal that turns a radio transmitter off and on 

What makes you think that the transmitter is separate ... ?

Top Tips:

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  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillatorhttps://www.avrfreaks.net/comment...
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Yes , Maybe hacking , i have bought 2 of these Rf controllers and just want to use one transmitter(mentioned above) to controll two different receivers , i opend the box to see the electronic circuit inside , faced with this IC !
Thanks

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Then try googling the make & model of the controller and receiver(s).

 

If someone's already hacked it, they will likely have shared it online.

 

Otherwise, you're just going to have to get your 'scope out, and start reverse-engineering it.

 

Or just buy one that's designed for customisation; eg,

 

https://www.rfsolutions.co.uk/remote-control-systems-c9/embedded-systems-c26

 

https://uk.rs-online.com/web/p/p...

 

https://uk.rs-online.com/web/p/r...

 

 

Top Tips:

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  2. "Garbage" characters on a serial terminal are (almost?) invariably due to wrong baud rate - see: https://learn.sparkfun.com/tutorials/serial-communication
  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillatorhttps://www.avrfreaks.net/comment...
  5. When your question is resolved, mark the solution: https://www.avrfreaks.net/comment...
  6. Beginner's "Getting Started" tips: https://www.avrfreaks.net/comment...
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It's one layer board , (top copper)

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so you can easily draw its schematic, then

Top Tips:

  1. How to properly post source code - see: https://www.avrfreaks.net/comment... - also how to properly include images/pictures
  2. "Garbage" characters on a serial terminal are (almost?) invariably due to wrong baud rate - see: https://learn.sparkfun.com/tutorials/serial-communication
  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillatorhttps://www.avrfreaks.net/comment...
  5. When your question is resolved, mark the solution: https://www.avrfreaks.net/comment...
  6. Beginner's "Getting Started" tips: https://www.avrfreaks.net/comment...
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I'll try to...
, thanks

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Ofcourse yes , but the question is the IC !
What is that?!

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Are you referring to the IC next to the Crystal? Maybe just the RF transmitter chip? The other is obviously a Microchip 12F635 micro.

John Samperi

Ampertronics Pty. Ltd.

www.ampertronics.com.au

* Electronic Design * Custom Products * Contract Assembly

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Note that the picture in #3 is not the one that the OP is asking about!

 

That confused me for a while!

 

Doesn't help that ms.moeini  has hidden her/his pictures as attachments, while sbennett  posted hers/his in the post where we can see it.

 

ms.moeini: see Tip #1 for how to properly post images as sbennett  did in #3. and please crop the photos.

Top Tips:

  1. How to properly post source code - see: https://www.avrfreaks.net/comment... - also how to properly include images/pictures
  2. "Garbage" characters on a serial terminal are (almost?) invariably due to wrong baud rate - see: https://learn.sparkfun.com/tutorials/serial-communication
  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillatorhttps://www.avrfreaks.net/comment...
  5. When your question is resolved, mark the solution: https://www.avrfreaks.net/comment...
  6. Beginner's "Getting Started" tips: https://www.avrfreaks.net/comment...
Last Edited: Mon. Jul 30, 2018 - 08:00 AM
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ms.moeini wrote:
the question is the IC !

and that question has been answered - see #8 & #9

Top Tips:

  1. How to properly post source code - see: https://www.avrfreaks.net/comment... - also how to properly include images/pictures
  2. "Garbage" characters on a serial terminal are (almost?) invariably due to wrong baud rate - see: https://learn.sparkfun.com/tutorials/serial-communication
  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillatorhttps://www.avrfreaks.net/comment...
  5. When your question is resolved, mark the solution: https://www.avrfreaks.net/comment...
  6. Beginner's "Getting Started" tips: https://www.avrfreaks.net/comment...
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Here is the OP's unit.