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1  Community / Exhibition / Gallery / Re: Cheap UHF spectrum analyzer using RFM22 module on: May 01, 2012, 07:17:09 pm
Great improvements!!!  Very nice Zitron smiley-wink
2  Community / Exhibition / Gallery / Re: Cheap UHF spectrum analyzer using RFM22 module on: April 16, 2012, 08:56:45 am
Today I received the Zitron PCB's, look much better in my hands than here in the pictures !   smiley-grin
Now just need to buy the RFM22.

Thanks Zitron smiley-wink
3  Community / Exhibition / Gallery / Re: Cheap UHF spectrum analyzer using RFM22 module on: April 14, 2012, 04:23:45 pm
Take a look in the attached file. 
4  Community / Exhibition / Gallery / Re: Cheap UHF spectrum analyzer using RFM22 module on: April 14, 2012, 03:37:42 pm
No the RFM12BP (and lower power RFM12) uses a completely different RF chip. Although there are probably arduino code for it somewhere on the intarwebs since it's been around for a while.

Ok, will be easier to maintain rfm22 and when everything is operational, use the rf2126 booster mentioned by msev (datasheet says it is compatible with 433MHz).
5  Community / Exhibition / Gallery / Re: Cheap UHF spectrum analyzer using RFM22 module on: April 13, 2012, 11:18:17 pm
What you think about a integration of the RFM12BP with your circuit in the future? Seems to be very similar to rfm22 but with 500mw. It is possible without modifications on your code?

Regards
6  Community / Exhibition / Gallery / Re: Cheap UHF spectrum analyzer using RFM22 module on: April 12, 2012, 01:53:37 pm
Yeah except I really don't know much about RF design... If I tried to make one of those high power amps it would probably catch fire!

Don't worry man, i have a uncle that is firefighter ... smiley-grin     If you make one RF booster, I'll test for you!  smiley-lol 
7  Community / Exhibition / Gallery / Re: Cheap UHF spectrum analyzer using RFM22 module on: April 12, 2012, 12:53:51 pm
te]
Edit: Important notice, please make sure that you can find a 5V source on your radio, this board does not have a voltage regulator for the arduino, so you can not power it direct from your TX battery. 

Well, my TX is a Graupner MC-19, I think that a LM7805 can solve the problem dont?  Anyway, I do intent to use your tx uhf with a joystick that generates the ppm signal from another arduino (details here: http://www.ianjohnston.com/content/index.php?option=com_content&view=article&id=30:project-rc-ppm-trainer-port-joystick) I have done this on my homemade console that you can see here at work:


The joystick will be a old but cool "Top Gun" , and a pair of old T2m rudder pedals, all for FPV obviously.
8  Community / Exhibition / Gallery / Re: Cheap UHF spectrum analyzer using RFM22 module on: April 12, 2012, 06:18:11 am
These boards looks great! 

BTW I don't know if anyone would be interested in this, but I have found that the RF22 library is not compatible with timer based hardware servos. Very weird and hard to debug. It is because the interrupt driven read function takes too long, messing up servo PWM timings. I had to modify the library quite a bit, but now I have hardware servos! If anyone else have problems with the servo library I'll let you know what to change.

Can you upload your modifyed library or explain here what to change?  Did you solved the glitches issue with this mod?

Regards
9  Community / Exhibition / Gallery / Re: Cheap UHF spectrum analyzer using RFM22 module on: April 11, 2012, 12:58:43 pm
OK guys sorry I can't keep giving away boards for free. From now on I will charge a small fee (£2 per board) just to cover my costs.

More than fair! 

Before you decide to start this project, make sure you can write code for arduino, ideally have some knowledge about SPI communincations, can solder SMD packages, and can find all the components that you need, listed in the BOM pdf attachted in a previous post. I can help, but I don't have time to answer all the questions.

I can solder SMD and get all the components needed; I have lots of open source arduino projects done but... I don't write arduino code... if you do not mind sending me the actual code, as well as any updates, I think I'll have no problems. If you do not mind that your project is shared, I think it might bring some progress in the project through some friends. But as I said before ... I do not write code...
Zitron What do you think? It is worth I join the project? 
10  Community / Exhibition / Gallery / Re: Cheap UHF spectrum analyzer using RFM22 module on: April 11, 2012, 04:00:58 am
Yeah I can send you the 3 rev 1 boards msev wanted. I can send him the new boards if he still wants them.

Zitron, this is great!  Glad to be able to get into your project. I'll send you a pm.

Thanks smiley-wink
11  Community / Exhibition / Gallery / Re: Cheap UHF spectrum analyzer using RFM22 module on: April 09, 2012, 11:16:38 pm
Great stuff!  It is the most simple and cheap Lrs that I have seen, just amazing.  Zitron, Did you have an additional pair of boards that could sell me? Where I live I can not get anyone to manufacture pcb's with that professional look in few quantities. I was thinking of trying to do a diy Openlrs, but now I saw this topic ... no way!
Next project: Zitron lrs cheap!  smiley

Thanks in advance,

Daniel
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