Re: [Paparazzi-devel] Hardware filtering quesiton

[Daniel Morgan]

Also another quick question that is a little off topic but has anyone everyone used the sarantel helical antenna on paparazzi and if so how did they go about mounting it?

On Sat, Jun 7, 2008 at 12:57 AM, Michel GORRAZ <address@hidden> wrote:

I don't know, you need to compare a standard Tiny and a "filtered" one in the same environment.

Let us know the results :)

@+
Michel

2008/6/7 Daniel Morgan <address@hidden>:

Do you think these would be effective on the tiny boards?

On Fri, Jun 6, 2008 at 5:18 PM, Michel GORRAZ <address@hidden> wrote:

Hi Daniel,

1206 and 0805 doesn't mean values but...sizes !
0805 = 80 x 50mil (20.3 x 1.27mm)
1206 = 120 x 60mil (3.05 x 1.52mm)

So the components you need are :
capacitors value = 1pf, tolerance = 10% (or less), max voltage = 100V (or more), size 0805
inductors (coils) value = 6.8nH, tolerance = 20% (or less), size 1206

Nice filter (ugly module soldering :) but probably useless with such a small GPS antenna ground plane...

@+
Michel

2008/6/6 Daniel Morgan <address@hidden>:

SO i have been looking at this website trying to figure out how to make a filter for the gps so it will reject outside frequencies but have been unable to figure out what a 1206 coil is specifically.. I think it is a inductor but i thought those were measured in Henry's.. Here is the website http://www.webx.dk/rc/video-wireless/filtergps.htm . The filter i am looking to make is the:

Homemade low-pass filter for GPS and block for 2.4GHz

using 1206 coils (20% tolerance) and cheap 0805 1pF (10%) 100V capacitors.

Maybe someone who knows what this guy is talking about can explain it better. I would really appreciate this.. Sorry for the dumb question

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