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The RC-Cam.com forum was the very first online community dedicated to the advancement of wireless video cameras on radio controlled (R/C) models. This is now called "FPV" (First Person View). We are proud of the contributions that our members have made to the FPV hobby.

We've seen significant changes over the last twenty years. Initially there were a lot of eager R/C hobbyist that built their own video systems. Allowing these creative individuals to share their work was the purpose of this site. Now the FPV market is flooded with low cost systems; Sadly DiY FPV video projects are now rarely discussed.

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we only need VTG and GGA

so at only 4800 we can run 3Hz max

and at 9600 we can run 5Hz

and 19200 just makes it perfect to have tons of overhead speed.

if it helps with 57600 there must be a serious bug in the EB85,

also when I got the 500m off problem, I was desending really fast and spinning arround, reaching different sats in the horozon, and then landing just after, only reaching sats straight up, when on ground,

I think this kind of crazy flying is only done for extreme testing,

and must screw of most GPS receivers no matter what baud rate.

but again thanks for the input,

I can actually mount two GPS units on the same plane,

and OSD them both at the same time, using different baud settings

and also try with different types of GPS units.

I have ordered some more EB85 for my tests.

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It's funny they default them at 38400/5Hz then if it causes problems :unsure:

On my side I haven't seen any erratic behavior in any configuration yet. I've even made myself a nice bluetooth-enabled EB85A for use with my PDA :P

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here it is..

sorry this time compressed a bit hard, but nice tiny file size,

ok I even see I was a bit on the back also :-)

Edited by ThomasScherrer
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Latest news:

the OSD project has now again got a firmware upgrade:

now the users can compleetly setup the OSD screen as they like,

they simply select each line and then put each result as they like,

anything can be written in anyorder you can imagine,

several codes exist to put spaces and txt also,

so you can place your name on the screen or the name of the plane.

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>that video got too much space in the left margin, you agree?

absolutly, that is what happen coz I sat it up to look good in a crappy

old TV set, this TV is zoomed quite much,

and also my grabber starts recording at a really erly state from the sync,

but the txt can now be adjustet compleetly as you like,

nothing needs to be placed the way I did it.

Yes the resolution can be changed I can add more lines and I can also

add more txt pr line, with the processing power I have almost double in both ways is possible, only problem is RAM but we can simply upgrade the OSD chip to a MEGA168 also, giving us the double ram needed.

I dont want to scale the font set, so higher resolution = smaller chars.

but again we like this to fit most users demand/need,

if the txt is too small you need much more expensive googles to read it,

and you also need to record in hi res all the time = too big video files.

the way it is now with 16 lines of 32 chars is found to be a good compromise when tested. it looks fine even in lores recordings 320x240 so it will also look good on the cheap googles.

if most of our potential custormers demands is higher res, we will change it.

if only one ask for it, I say no since my time is limited and not for free.

also I dont want to compeete with the bob4 it is a 105$ OSD board with tons of cool OSD features, you need a 20$ CPU extra and a 100$ GPS and 30$ worth of sensors, and PCB layout and soldering and testing, 1000 hrs to write the software, extra socket for the BOB4 add on board, bulky and big solution, also such an OSD project will be sold for 500$ each or even more, selling only 5 units in total = failure if you ask anybody that want to run a business with it.

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sure it is possible, the users have several extra analog inputs,

they can configure them to show whatever they like,

the gain and ofset and letters can be adjusted.

but to keep cost down the standard version uses a GPS,

it seems like an ok compromise for most users,

advanced users are welcome to connect and configure.

also you can connect all other kinds of sensors you can imagine,

only demand they need analog output, that is the most open and flexible way

to interface tons of stuff without firmware upgrading all the time.

some inputs have full scale at 1V others 50V or even more.

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About the OSD resolution:


Here in normal size


Here hi res in the width


Here Hi res both width and height

All 3 pictures was grapped in 720x576 and scaled 50% down

to fit into the forum size.

Fractions can also be done if needed later.

but the Normal size is actualy a really cool allround size.

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i like the last one, the most tiny, :D at 640x480 should be look perfect.

1º it's possible to show the whole line with the background? not just the numbers,

2º user can program alarms like... "when home distance is more than 600 m, then background will become red, and number will blink" ?

3º and what about add lellers before number? you show just "0 m" i want to see "Home: 0 m.", can we add what we want too?

Edited by wallaguest1
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>1º it's possible to show the whole line with the background? not just the numbers,

I am not sure if I understand your question right ?

we have invisible space and dark space in the char set,

so when you configure your screen setup, just use the one you like.

and if you dont like the dark background, simply solder out the darken resistor R6

and only white chars will be shown, but it will be a bit dificult to read on white

video picture.

>2º user can program alarms like...

>"when home distance is more than 600 m,

>then background will become red, and number will blink" ?

no colors possible ! that will cost 100$ extra to slove !

alarms is possible, but not implemented yet,

some beta testers have requested mAh alarms, voltage alarms,

currents alarms, or even too hi temperature alarms.

If I ever implement this, I want to make it possible to configure if

ANY parameter is over or under a limit, and then indicate ALARM and what is wrong.

>3º and what about add lellers before number?

>you show just "0 m" i want to see "Home: 0 m.", can we add what we want too?

exactly, you can do whatever you like,

but to keep screen as clean as possible I dont recommend it, just my personal taste, great you have another taste and possible to change it as you like.

we have some ideas to have the screen setups in seperate files,

so the users can simply choose from a list of pre-defined defaults

and change them from that, this explain the possible ways and a fast result.

also users should be able to upload screenshoots and cool setup files to share to others, all this Mark works hard to solve right now.

Same with the GPS init strings, they can be hard to compose

you need to read manuals and calculate checksums and such,

so we have EB85 and EM406 as defaults now, since they are widely used.

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It doesn't depend much on the resolution, but more on your display's FOV... if it has a huge resolution but the screen still appears small to the eye that doesn't help.

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after playing a bit with the bits and bytes in the screen setup area

I made it look like this.

the bargraph in the upper left is the satelite number, a bit more discrte,

it is still possible to display sats as a number and the icons also,

and also at the same time if needed.

tons of other things is possible, same firmware, but simply changed user settings

Edited by ThomasScherrer
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soooooo tiny. I tried looking at one of those pictures blown up to 800x600 on my Z800 HMD and they were not easy to read at all. By the time you manage to read it, you wont have noticed that your plane is now stuck in a tree haha.

http://www.intelligentflight.com.au/video/eat.avi - lol

ARE YOU SERIOUS ABOUT THAT PACMAN?!?!!? THAT IS SOOOOOO COOL!!!!! :lol::lol::lol: Made me laugh because I totally didn't expect that one Mark!!!! I love it! ;)

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A question that keeps coming up is "OSD vs. in-plane instruments'.

Playing with the Eagletree Micropower LCD panel as a 'live cockpit', I'm reminded that a model in turbulent conditions reacts like a fast jet; I find I just don't have time to look around for a display when I need the info (altitude check, or airspeed). On the other hand, most of the time I don't want to record video with an OSD overlay either.

Mark, could your OSD have a pin input for bypassing the OSD? Ideally this would have a software-set PPM threshold, so you just plug a spare R/C channel input, and control whether or not you transmit the video OR video+OSD? So you have display ON for those record-breaking/model saving moments (altitude records, lost model, on finals), but can turn it OFF if you just want to look around and admire the view?

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Yep, that is on the feature list. It's the best compromise IMO, as anyway there's no need to have the display on all the time.

The LCD in view is my favorite, but can be difficult to implement depending on the plane (no way to mount it, difficult to adjust distance to have proper focus,...)

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