Pira.cz Technical Forum

Radio Data System (RDS) => MRDS1322 => Topic started by: SteveyD on October 01, 2011, 09:42:38 am

Title: TinyRDS
Post by: SteveyD on October 01, 2011, 09:42:38 am

Jan

When will the TinyRDS be listed for sale?

Do you have a estimated price?

Any schematics available?

I'm assuming the TinyRDS is based on the MRDS1322 chip, has there been any revisions to the chip since late spring?


Regards
Steve

Title: Re: TinyRDS
Post by: Jan on October 02, 2011, 01:38:25 pm

TinyRDS is a control software common for MiniRDS (system based on MRDS192) and MicroRDS (future system based on MRDS1322).

Title: Re: TinyRDS
Post by: SteveyD on October 02, 2011, 09:32:02 pm

Thanks Jan

I meant to ask about the MicoRDS..

Has there been any revisions to its programming of the MRDS1322 or schematic since it was first published?

Now that I have a working .Net version of the example.pas I want to begin building the MRDS1322 circuit to test as well.

Regards
Steve

Title: Re: TinyRDS
Post by: Jan on October 02, 2011, 09:42:13 pm

Complete MRDS1322 wiring is available in the pdf http://pira.cz/rds/mrds1322.pdf (http://pira.cz/rds/mrds1322.pdf).
Ask on email for the IC engineering samples (DIP or SOIC). Availability of final product will be specified (a 3rd party company is producing it).

Title: Re: TinyRDS
Post by: SteveyD on October 23, 2011, 06:39:43 pm

Jan

Are there any changes between the figure 8.1 and the your production release?

Do you have a source for the following components, I'd like to get more details on each part to try to find a North American equivalent so I can complete my test circuit.

Y1
C5
R21


Regards
Steve

Title: Re: TinyRDS
Post by: Jan on October 23, 2011, 09:37:17 pm

Y1 - 4.332 MHz crystal, operating frequency may vary +/- 0.01 %, for given crystal type, exact frequency must be found on prototype by changing the C1 and C2 value.
C5 - Exact value depends on L1 characteristics. Resonating frequency must be found on prototype using an oscilloscope, it may be a combination for example 22n + 2n2.
R21 - trimmer 1k linear