Gen4 pics

[martinv]

Shortcircuit protection on cam and Tx power supply. The OSD isnt damaged if you short those outputs.

That should reduce the number of customer issues

[bilboa]

I've some questions:
- what is the weight of the RVOSD v4 (without horizon sensor and gps) ?
- what is the current consumption (at a common voltage)
- is the barometer accurate enough to serve as variometer? (audible beep for thermals for example)
- what do you think of the RVOSD pricing vs competitors ?

thanks!

[reznikvova]

Hi,

1. 40 grams.
2. 210 mA including GPS
3. yes, But the RVOSD doesn't have an audio variometer.
4. which ones?

Best,
Vova

[bilboa]

thx for the replies!

about the price, well, i prefer not to go into details because i dont think its an easy subject to ask directly the vendors lol.

I'll try to explain but please don't get mad ok ? Maybe i just shouldn't ask such things lol

rvosd cost $400 with horizon sensors, overall very good and nicely implemented features, especially fly by wire and autopilot, are very good. however, no IMU, no base station (yet.. but we know it can take a year..)

competition has much lower priced OSD's, even the upcoming dragonosd+ is going to hit like $220 with gps/current/IMU (100/130 "bare").. yes no filtered power i know. (its however much lighter/consumes not much)

[Alex Villa]

If you use a 2200mAh battery for an Ezstar, and you get half hour of flight time, it means that RVOSD will take from your flight battery around 100mAh, this is less than the 5% of your flight time. Or 1 min 30 seconds. I dont think this is too much.

Comparing RVOSD against other OSDs need to be done using the same feature set. When you buy RVOSD, you are getting everything you need to have your FPV system online, all cables, a built in filtered power source for the cam and Tx(5 and/or 12V), GPS module, current sensor, now it have barometric altimeter.
If you add to this the thermal sensors you will get the only AHI in the market because up to date only selected people managed to make the rudimentary Eagle tree AHI to work, and this so badly that you cant see it anymore on the videos they post.
RVOSD is the only OSD that incorporate attitude sensors on the control loops for return to home systems, so it can control planes without natural stability and flying wings.
It is the only OSD with autopilot options like level flight, flight by wire, heading hold, hold position, and waypoint sequencer.
The display updates of the OSD are fast, stable and smooth, unlike our closest competitor. Just look at the videos and you will notice what I am saying.
Having everything in one unit save the user from a cabling hell, and reduce the chances of failures because of the exessive wiring.

On the other hand our lack of some aditional sensors might be seem as a weakness, but this is about to change soon.
And finally our ground station will fill the gap for tracking antenna, diversity, Google earth support and data logging.
About the DragonOSD+ I have to say that they are just releasing it, i didnt saw yet support for simple graphics, like lines and this is a must for AHI drawing. The IMU is not something you can buy yet, but a feature Daniel Wee have being working on from long time ago, but not ready yet.
As a programmer I have to say that there is a big difference between anouncing something, saying that it is ready, and being able to release it for real world testing. Notice that RVOSD use two of the same kind of processors that the Dragon+ is using now. There is a reason for that, It is very hard to make the dsPIC work the graphics and do everything else, so I had to split the work between two processors. The use of two processors also waranty that the return to home system cant be affected by camera failure(or cable disconects), faster refresh rates and more smooth display.
By the way the stated current consumption of the processor type used on the DOSD+ (dsPIC33F series) only draw 55mA when is clocked to 20MIPS. Running at 40MIPS it takes @90mA this is according to datasheet. And this is the processor only. Thus the consumption of RVOSD 90+90mA(two processors running a total of 80MIPS) plus the current of the buffers and efficiency lost of switched and linear regulators.
The board can be made lighter and simpler, but it lacks of filtering on the inputs/outputs, buffers on the outputs etc...
So add to the 100-130 value, the GPS, the cables, the filtering/power source for video and camera, the autopilot modes, the infrared control configuration capabilities so you dont have to remove the OSD for menu configuration, the graphic engine, the buffer ICs, the current sensor, the filtering to reduce the RFI caused by the OSD, the computer interface for programming, the AHI, the extra thermopile sensors support and process on board... And you can see where the extra 200 USD come from.

[Alex Villa]

From the Hardware point of view you can see the differences here:

[bilboa]

thanks for the very detailled reply! that's rare enough to be underlined.

I did notice the RVOSD has much nicer graphics/no lag compared to the others
That by using 2 processors the RVOSD continues to operate with RTH while video is lost is a thing i did not know and a very good point.

The DOSD+ seems to be operating fine, but I did notice slight video lag with the IMU test video, and probably this also lags the autopilot and stabilization system - likely while they ship without it for now. (in all other cases its a quite nice OSD however - wires & own power supply aren't a big issue for me).

So I still think the lower weight/size and price (the diff is quite large that's why it surprises me) would be nice but I see where you're coming from.

I'm going to have a difficult talk with my wallet in all honesty

ps: any plan for the IMU?

[canopus]

RVOSD simply the best..and i think all other member's have the same opinion..

[studiopetros]

I think the same.
Simpli the best and have the best support.

[Martin Y]

Thats why I got mine. No matter what the other guy in Miami thinks he knows.