prosimparts radio modules

[bas_v]

That's why I am *so* glad with the Teensy and the X-plane plugin from Paul Stoffregen; using a MAX7219 I have created one NAV radio. I still need to figure out how to cascade 7219's... That'll take only 3 pins from the Teensy board.

More info: http://www.pjrc.com/teensy/td_libs_LedControl.html

[Sammy-E]

I agree with Bas. Teensy works great with xplane. Difference between the teensy and pokeys is that the teensy works with serial data and pokeys do not. I find it easier to connect to the pokeys, but with a little effort a teensy should work well. check the arduino links about fsx on this forum and the freeware software from jim_nz.

Rough calculation of the costs using pokeys:
2x50 euro pokeys cards
4x30 euro display cards,
4x10 euro cable sets
150 euro prosim panels (1nav,1comms,1 adf)
= 410 euro. Thats roughly 130 euro per panel. Dangerously close to plug and play sets..

If one could use the Sismo board: 119 euro in stead of 2 pokeys and 4 displays.. Then its about 320 euros. I cant advise on the sismo board as i dont have one. But it does look better financially. Bas, how many 7219 can be attached to a teensy? A teeny is only 20$..

[bas_v]

Yep, and the MAX7219's can be cascaded. Just found a schema of how to do it. What I'd like to do is design a PCB that holds multiple MAX7219's so I can build my MCP with one Teensy board (or two, to be able to use sufficient interrupt inputs for the encoders). I am now mainly focusing on my MCP delivery and outputs (all the digits hooked up).

Sammy-E, I suspect one can chain about 8 MAX7219's together. The PJRC site doesn't say how many can be chained together, but as always, it probably is an even number and a power of 2

Link to the schema: http://rgb.kitiyo.com/pics/rgb-ckt-pg1.png

Edit: should mention that I am no expert on electronics and am looking for a partner to design the PCB. If I do come up with something I will share the design.

[mrmaster]

Hi,

how much do you pay for the MAX7219? it's ridiculous - 10€ each....

Take a look at my MCP - that's exactly what ARCOM is about^^ but cheaper, and the PCBs are already designed...

Marc

[bas_v]

Ridiculously high or ridiculously low?

I paid 12,50 euro for the one I have at the moment. I'm quite satisfied with that, as the alternative that Sammy-E describes is much worse in terms of cost.

I'll have a look at Arcom, but I have already made up my mind I think. I'd rather live with self-inflicted constraints than those inflicted by somebody else's design. That having said, I'll look at your design

[mrmaster]

12,50 € ...

that is TOO MUCH...

I'm sorry but that's ridiculously high...

Marc

[Sammy-E]

I'm sorry but that's ridiculously high...

Marc

Well.. What would you consider a normal price?

[mrmaster]

There are chips which cost about half of that and are just the same... I can sell you 6 pcs for 30€

Marc

[bas_v]

12,50 € (banging head into wall)

that is TOO MUCH...

I'm sorry but that's ridiculously high...

Marc

Sorry, but could you substantiate your claims, please? You talk about the "cheapest solution, period" on your site, but I can't find any further information as to how or what. I might be overlooking something, of course.

With regard to the PCB, do you really expect people to pay for PCB layouts without knowing what they actually get? (just curious). Some pics would help you sell your product, no doubt.

[mrmaster]

you know... i won't tell you exactly which chips I sell because then there would be no reason to buy them from me!!!

my system works and you're upset because you're not the first one to go that way...

btw.: you want pictures?

there you go:
http://x737cockpit.files.wordpress.com/2012/02/img_0441.jpg?w=627

http://x737cockpit.files.wordpress.c...2/img_0381.jpg
http://x737cockpit.files.wordpress.c...2/img_0435.jpg
http://x737cockpit.files.wordpress.c...2/img_0415.jpg

Marc

(i'm not haughty it's just when people start to get sanctimonious...)