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en:tech:dabmodule [2022/09/26 08:37] – [Downloads] bullaren:tech:dabmodule [2026/08/12 12:15] (current) – external edit 127.0.0.1
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 ====== DAB+ Module ====== ====== DAB+ Module ======
 +
 +===== Motivation =====
  
 In the age of 'music streaming', terrestrial radio listening seems antiquated. In the absence of WLAN or mobile communications, however, it can be an alternative to stay connected to the world, at least while consuming. FM (UKW) transmission was first trial took place in Germany almost 100 years ago (1925). And actually FM was supposed to be discontinued in 2012, but this only became reality in the cable network. To the delight of motorists with conventional analogue radios. The current digital successor DAB+ (the previous, incompatible and not very successful DAB was discontinued) is at least visible on the market and there are a number of inexpensive DAB+ receivers under €30. I decided to try out a TechniSat TECHNIRADIO RDR: In the age of 'music streaming', terrestrial radio listening seems antiquated. In the absence of WLAN or mobile communications, however, it can be an alternative to stay connected to the world, at least while consuming. FM (UKW) transmission was first trial took place in Germany almost 100 years ago (1925). And actually FM was supposed to be discontinued in 2012, but this only became reality in the cable network. To the delight of motorists with conventional analogue radios. The current digital successor DAB+ (the previous, incompatible and not very successful DAB was discontinued) is at least visible on the market and there are a number of inexpensive DAB+ receivers under €30. I decided to try out a TechniSat TECHNIRADIO RDR:
  
-{{ :de:tech:techniradio_rdr.png?nolink&300 |}}+{{ :media:tech:dabmodule:techniradio_rdr.png?nolink&300 |}}
  
 The radio has all the important functions for digital reception in a handy housing. The radio has all the important functions for digital reception in a handy housing.
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 The right tool can be obtained in the Far East for less than €10. The right tool can be obtained in the Far East for less than €10.
  
-{{ :tech:serial_flash_progammer.png?nolink&300 |Serial Flash Programmer}}+{{ :media:tech:waterlevel:serial_flash_progammer.png?nolink&300 |Serial Flash Programmer}}
  
  
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 My goal was to develop the smallest possible module, which can then be placed anywhere, similar to the KeyStone solution. My goal was to develop the smallest possible module, which can then be placed anywhere, similar to the KeyStone solution.
 The chip manufacturer's Application Note [[https://www.skyworksinc.com/-/media/Skyworks/SL/documents/public/application-notes/AN851.pdf|AN851]] provides an example schematic and some PCB design rules. All the designers of the boards I have have adhered to this. This inhibits willingness to experiment: The chip manufacturer's Application Note [[https://www.skyworksinc.com/-/media/Skyworks/SL/documents/public/application-notes/AN851.pdf|AN851]] provides an example schematic and some PCB design rules. All the designers of the boards I have have adhered to this. This inhibits willingness to experiment:
 +
 +{{ :media:tech:dabmodule:dab_module_sch.png?direct&400 |DAB+ module}}
  
 The module contains everything for relaxed FM/DAB+ reception and offers the following connectivity: The module contains everything for relaxed FM/DAB+ reception and offers the following connectivity:
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 The PCB always looks more benign after routing than during the design process. For a better representation in the following picture without filled ground areas: The PCB always looks more benign after routing than during the design process. For a better representation in the following picture without filled ground areas:
  
-{{ :tech:dab_module_brd.png?direct&400 |DAB+ module PCB}}+{{ :media:tech:dabmodule:dab_module_brd.png?direct&400 |DAB+ module PCB}}
  
 In order for the selected SMA socket to fit, the PCB should only be produced 1.0mm thick. With 29x18mm, the module looks quite handy. Produced by [[https://jlcpcb.com|JLCPCB]] it costs a little more than usual because I used //Castellated Holes// so half holes for the module connections. I definitely recommend ordering a stencil, otherwise it will be even more fun when you paste it. Here is the 'paste' result with stencil: In order for the selected SMA socket to fit, the PCB should only be produced 1.0mm thick. With 29x18mm, the module looks quite handy. Produced by [[https://jlcpcb.com|JLCPCB]] it costs a little more than usual because I used //Castellated Holes// so half holes for the module connections. I definitely recommend ordering a stencil, otherwise it will be even more fun when you paste it. Here is the 'paste' result with stencil:
  
-{{ :tech:dab_module_paste.jpeg?direct&400 | DAB+ module paste example}}+{{ :media:tech:dabmodule:dab_module_paste.jpeg?direct&400 | DAB+ module paste example}}
  
 By the way, a microscope is also very helpful when assembling. And don't forget to program the FLASH component better beforehand. You may have to remove short cuts on the pins of the SI4684 with some desoldering braid after reflow soldering (with T962). These cannot be avoided at a pin pitch of 0.5mm. By the way, a microscope is also very helpful when assembling. And don't forget to program the FLASH component better beforehand. You may have to remove short cuts on the pins of the SI4684 with some desoldering braid after reflow soldering (with T962). These cannot be avoided at a pin pitch of 0.5mm.
  
-{{ :tech:dab_mdule_pcb.png?direct&400 | DAB+ module soldered}}+{{ :media:tech:dabmodule:dab_mdule_pcb.png?direct&400 | DAB+ module soldered}}
  
 The module is now available for initial use. So that it remains solder-technically virgin, I have designed a pogo adapter: The module is now available for initial use. So that it remains solder-technically virgin, I have designed a pogo adapter:
  
-{{ :de:tech:dab_module_adapter.png?direct&400 |DAB+ module adapter}}+{{ :media:tech:dabmodule:dab_module_adapter.png?direct&400 |DAB+ module adapter}}
  
 created for testing based on Arduino Uno with a standard experiment board. You can of course use any other evaluation board that offers a programmable SPI interface. Please don't forget the level shifter since the DAB+ module works with 3.3V signals. If you also connect an amplifier (here a PAM8302A) then you can soon hear the success. created for testing based on Arduino Uno with a standard experiment board. You can of course use any other evaluation board that offers a programmable SPI interface. Please don't forget the level shifter since the DAB+ module works with 3.3V signals. If you also connect an amplifier (here a PAM8302A) then you can soon hear the success.
  
-{{ :tech:dab_module_test_board.png?direct&400 | Test Board on top of an Arduino Uno}}+{{ :media:tech:dabmodule:dab_module_test_board.png?direct&400 | Test Board on top of an Arduino Uno}}
  
 ===== Software ===== ===== Software =====
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 ===== Downloads ===== ===== Downloads =====
  
-  * {{:tech:dab_module_sch.pdf| Schematic (,pdf)}} +  * {{:media:tech:dabmodule:dab_module_sch.pdf| Schematic (,pdf)}} 
-  * {{:tech:dab_module_bom.csv.zip| Bill of material (BOM) als .csv}} +  * {{:media:tech:dabmodule:dab_module_bom.csv.zip| Bill of material (BOM) als .csv}} 
-  * {{:tech:dab_module.brd.zip| PCB Eagle File (.brd)}} +  * {{:media:tech:dabmodule:dab_module.brd.zip| PCB Eagle File (.brd)}} 
-  * {{:tech:dab_module_adapter.zip | Module Adapter base and clamp (.stl)}} +  * {{:media:tech:dabmodule:dab_module_adapter.zip | Module Adapter base and clamp (.stl)}} 
-  * {{:tech:dab_modtest.zip| Test software (.ino)}}+  * {{:media:tech:dabmodule:dab_modtest.zip| Test software (.ino)}}
  
-==== Donate ====+===== Donate =====
  
-If you line my articles feel to donate a cappuccino or so...+If you like my articles feel to donate a cappuccino or so...
  
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