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by Vassilis
Wed Mar 29, 2017 3:06 pm
Forum: Postbag
Topic: Rogers postbag - FM radio band transmitter
Replies: 46
Views: 896

Re: Rogers postbag - FM radio band transmitter

Finally I managed to make the RDS work !
Here there are some screenshots from my cell phone

J5_2a.png
J5_2a.png (24.07 KiB) Viewed 18 times

J5_1a.png
J5_1a.png (24.29 KiB) Viewed 18 times

J5_3a.png
J5_3a.png (24.15 KiB) Viewed 18 times
by Vassilis
Tue Mar 28, 2017 9:00 pm
Forum: Postbag
Topic: Rogers postbag - FM radio band transmitter
Replies: 46
Views: 896

Re: Rogers postbag - FM radio band transmitter

@Roger The sound quality is very good when I connect my mp3 player to the 3.5mm mini jack. The sound quality is not good when I connect my mp3 player to the Left and Right pins of the QN8027 chip (pin 9 and 10), when I control it with the maple mini. I used two additional capacitors, 1 uF on each pi...
by Vassilis
Tue Mar 28, 2017 6:33 pm
Forum: Postbag
Topic: Rogers postbag - FM radio band transmitter
Replies: 46
Views: 896

Re: Rogers postbag - FM radio band transmitter

The first test was a disappointment. I tried to connect a maple mini and a logic analyzer directly to the QN8027 I2C pins. It seems that the 1k resistors to I2C pins were prevent the maple mini to take over the QN8027 control. So, I de-soldered these resistors and I connected the maple mini directly...
by Vassilis
Mon Mar 27, 2017 2:38 pm
Forum: Postbag
Topic: Rogers postbag - FM radio band transmitter
Replies: 46
Views: 896

Re: Rogers postbag - FM radio band transmitter

Today I received my FM transmitter. It's time for tests now ! :D
by Vassilis
Wed Mar 15, 2017 6:09 am
Forum: Generic STM32F103
Topic: HELP! FTP server the library Serasidis_EtherCard_STM
Replies: 2
Views: 103

Re: HELP! FTP server the library Serasidis_EtherCard_STM

The Arduino EtherCard library is developed by JCW. I just ported it, some time ago, to STM32. You can ask JCW for adding the FTP server (if he has free time to do that of course...). https://github.com/jcw/ethercard Moreover, you can take a look at the following arduino FTP server in case you want t...
by Vassilis
Fri Feb 24, 2017 7:43 am
Forum: Postbag
Topic: Rogers postbag - FM radio band transmitter
Replies: 46
Views: 896

Re: Rogers postbag - FM radio band transmitter

raphik wrote:@ Vassilis. Geia sou. Nice purchase! Let's know when you receive the parcel.

Geia sou raphik I will let you know !

[Geia sou = Hello]
by Vassilis
Thu Feb 23, 2017 7:45 am
Forum: Postbag
Topic: Rogers postbag - FM radio band transmitter
Replies: 46
Views: 896

Re: Rogers postbag - FM radio band transmitter

Yesterday I purchased one of those FM transmitter modules (with LCD). I like the RDS capability.
by Vassilis
Wed Feb 22, 2017 1:06 pm
Forum: Postbag
Topic: Rogers postbag - FM radio band transmitter
Replies: 46
Views: 896

Re: Rogers postbag - FM radio band transmitter

The arduino QN8027 library is also interesting for learning the QN8027 registers.
by Vassilis
Tue Feb 21, 2017 2:07 pm
Forum: Postbag
Topic: Rogers postbag - FM radio band transmitter
Replies: 46
Views: 896

Re: Rogers postbag - FM radio band transmitter

@Roger
Has the FM transmitter you purchased good sound quality (clear sound) ?
by Vassilis
Sun Feb 05, 2017 11:45 am
Forum: Projects
Topic: GPS coordinates without GPS (using GSM) "not need GPRS"
Replies: 3
Views: 330

Re: GPS coordinates without GPS (using GSM) "not need GPRS"

Thanks for sharing VadimEL ! I have to notice that this kind of cell triangular positioning method is extremely inaccurate, especially in populated areas such as cities. It is very good if someone wants to use it as supplementary tool to his telemetry circuit design. I wouldn't recommend it as prima...

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