VHF Transceiver based on Propeller

MilitaryRadio

Hello,

I'm a radioamateur, I finished building my new 2m Transceiver based on a Propeller CPU.

The circuits are ready and working ... now I need only to start building the enclosure.

The radio is working really fine, it uses a propeller as main controller. The prop controls:

- the frequency setting through a PLL;
- the signal strength using an ADC;
- the power supply of the modules;
- the status of PLL lock;
- the status of muting;
- the LCD display.

The software is under development. The main functions are already implemented.

I attached the image of the circuits, the schematics and the source code.

Soon, I'll write a complete document with details.

bye

Paolo
iz0roo@fastwebnet.it

RT2m.SPIN

Phil Pilgrim (PhiPi)

Wow, Paolo! I'm very impressed with what you've accomplished! 'Looking forward to more details. Can you convert the schematics to PDF? The JPGs are a little bit hard to read.

Thanks,
-Phil
AD7YF

MilitaryRadio

Hi Phil,

Thanks for your appreciation :-)

I attached the PDF files as you requested, I hope you'll read it better.

bye

PaoloCPU1.pdfCPU2.pdfCPU3.pdfRX.pdfTX.pdf

Mark_T

Very interesting - what classes of modulation does it do? Are you using the microphone that's connected to the Prop?

MilitaryRadio

Hello,

This is a narrow band FM transceiver on 2m band (144-148 Mhz). The microphone is connected to the PLL circuit , it is not connected to the propeller.

Phil Pilgrim (PhiPi)

Paolo,

Thanks for the PDFs! They're much clearer.

-Phil

erco

Beautiful, Paolo! Make it into a kit!

MilitaryRadio

Thanks

If Parallax should be interested in making a kit I would be glad to provide any information and details.

Peter KG6LSE

Now THAT is a project !


Next step .. add SSB for DX and bam ! you will have ICOM outta biz in a month .
Iam serious



Peter

Tor

Very interesting. And just getting the idea to start with.. this I will keep an eye on.

73 de la1rha

Mark_T

MilitaryRadio wrote: »

Hello,

This is a narrow band FM transceiver on 2m band (144-148 Mhz). The microphone is connected to the PLL circuit , it is not connected to the propeller.

Ah, I can see the microphone pad on the PLL circuit - but there's definitely one on the CPU circuit connected to P21 - the same one or a circuit change?

MilitaryRadio

Hello,

I corrected the schematics and attached the new version.

The propeller is connected to the PLL through the A21 pin labeled "M-A21(CPU/2)" in order to produce and send on air the subtones. I still have to write the source code that plays sub tones.