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How Do I Use This Device

pete.cal

Nov 19, 2022
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I have been testing the "baseline" 433 MHz transmitter and receiver devices.
I needed more range so I looked for a superheterodyne device and bought this one on eBay.
I can't figure out how to use it.
I contacted the seller and he can't help.
Any information would be greatly appreciated.

Thanks.
Pete
 

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danadak

Feb 19, 2021
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What are the part numbers on the two chips ?

Link to ebay item for sale ?


Regards, Dana.
 

kellys_eye

Jun 25, 2010
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Rule 1 - don't buy anything you don't have information for (you wouldn't buy a car without knowing what engine it had or what colour it was etc would you?)

Rule 2 - search for a data sheet - it took me under a minute to come up with this: https://datasheet.lcsc.com/lcsc/1811101710_PTC-Princeton-Tech-pt2272-m4_C33778.pdf

Rule 3 - read, digest and understand what it is you're using. If you don't understand it you will likely fail at whatever it is you are trying to achieve with it.
 

pete.cal

Nov 19, 2022
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Nov 19, 2022
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What are the part numbers on the two chips ?

Link to ebay item for sale ?


Regards, Dana.
The big one is PT2272-M4 Also says SO229 KA1803
The small one is SYN407R 1631
The xtal is 6.458 MHz

The link is:

Wireless Superheterodyne Decoding Receiver Transmitter Module Kit 433Mhz​

deoutshopdeals (6505)

Thanks
 

pete.cal

Nov 19, 2022
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Rule 1 - don't buy anything you don't have information for (you wouldn't buy a car without knowing what engine it had or what colour it was etc would you?)
For $6.36, no big deal. The parts drawers in my lab are full of various items like this.
How did you know to search for PT2272. I had to use my USB microscope to see the print on the ICs. Anyway the PT2272 is not the portion I need. I am receiving a pulse train that doesn't conform to the codes. I plan to use the receiver part. I have been using the HiLetgo 433M Transmitter + Receiver Kit. The output of the receiver feeds a Raspberry Pi that I have already programmed to pick out my pulse train from all the other signals floating around. The problem is I don't have enough range. The superhet units should have higher sensitivity...I hope


Rule 3 - read, digest and understand what it is you're using. If you don't understand it you will likely fail at whatever it is you are trying to achieve with it.
I have read your device and as I said it isn't the part I will use. This board has pins "-,VT, D0, D1, D2, D3, +. I am thinking I will add a lead on the DO pin of the SYN407R and use that
 

kellys_eye

Jun 25, 2010
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The full part number includes the 'M4' bit (which indicates a 4-digit coding) that is also detailed on the datasheet (which happens to cover every version of the device in question).
 

pete.cal

Nov 19, 2022
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The full part number includes the 'M4' bit (which indicates a 4-digit coding) that is also detailed on the datasheet (which happens to cover every version of the device in question).
Yep, I saw that but that chip decodes pulse trains it receives. Unfortunately the pulse train I need to detect is not one of those it decodes. Not even close so I will bypass the PT2272.

Thanks Everyone.
 

danadak

Feb 19, 2021
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Feb 19, 2021
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Consider using ESP8266 or ESP32.





As far as range -





Regards, Dana.
 

pete.cal

Nov 19, 2022
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Nov 19, 2022
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I actually have a few ESP8266 boards for my next project. But they are WIFI. I am trying to receive 433 MHz transmissions
 
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