Comments (18)
I should add, the 'glitching' is generally that the overlay text flashes off
briefly then comes back on, frequency ranging between 2Hz down to every few
seconds.
The worst case I saw today the overlay was totally disrupted, barely any text
showing, and that which was visible was out of place.
Seems it might be the video overlay chip. Perhaps more decoupling caps
required?
Thanks,
John
Original comment by [email protected]
on 8 Apr 2012 at 9:33
from arducam-osd.
I have a BEC that makes all data disappear, when i move servos.
Not coming back till i reset MinimOSD.
I do not understand what is happening at all.
Original comment by [email protected]
on 10 Apr 2012 at 9:37
from arducam-osd.
It's not a defect. Every OSD out there in the marketing always recommends the
usage of a dedicated video-battery. That's why MinimOSD has the option of being
feed externally and also has two stages. That's also why APM has the option of
a separated servo rail powering (apart from the logic circuitry). Any servo
introduces noises on the power line. The nature of this noise depends on the
servos brand and model. It would get worse on analog servos. So, it's difficult
to filter it by just decoupling caps. It would need filters, fair-rite,
multiple steps decoupling caps and not necessarily would be successful. So, the
external small battery is the best, clean and easy way to do it. Some guys have
done it with a second source and BEC. On my own setup I'm using a 800ma battery
and a BEC feeding the board instead with APM. The newest MinimOSD hardware
(v1.5) will turn it even more easy, due it has a switching power instead of a
regulator, so you can tie the power and use the second stage to feed the board
with 12V battery, without extra heating.
Original comment by [email protected]
on 10 Apr 2012 at 10:26
- Changed state: Invalid
from arducam-osd.
Thank you Sbenigno,
So after v1.5 the overheating problem is non-existent?
That i was afraid of.
Was also afraid, that this noise problem also effects APM.
Does it?
Original comment by [email protected]
on 10 Apr 2012 at 1:27
from arducam-osd.
Yes. 1.5 is an improvement of MinimOSD hardware. But I'm using my old version
pretty fine and I'll not replace mine for now.
Regardless of using or not an OSD: if your servos noises are too high and your
APM circuitry is getting power from the servo rail, it could interfere on
analog devices reading. I cannot affirm that with 100% sure for all cases, but
some interferences would be possible. Like I said, that's why APM has the
option of isolating the servo rail from APM's circuitry power.
Original comment by [email protected]
on 10 Apr 2012 at 1:51
from arducam-osd.
How do i know if i have the new 1.5 osd?
My osd has a sign v0.1 on it.
Original comment by [email protected]
on 10 Apr 2012 at 5:33
from arducam-osd.
MinimOSD version 1.5 has "v1.5" on it.
This "v0.1" silk on our boards is a production typo. It should be "v1.0"
instead.
Original comment by [email protected]
on 10 Apr 2012 at 6:33
from arducam-osd.
Thank you,
Than i still have to be careful with overheating. :(
Original comment by [email protected]
on 11 Apr 2012 at 8:05
from arducam-osd.
It would be helpful to capture the essence of this issue on the miniosd wiki
pages. As it stands right now, it warns against an independent power supply
due to the overheating issue on the 2nd stage regulator.
Do I understand correctly that you are recommending that the minimosd power
should be bridged (eg power both stages from the APM), but that the APM itself
should be independently powered separately from the servo power rails?
Is there a reference on the APM2 documentation how to achieve this?
Thanks,
John
Original comment by [email protected]
on 11 Apr 2012 at 9:53
from arducam-osd.
>>>>>"Do I understand correctly that you are recommending that the minimosd
power
should be bridged (eg power both stages from the APM), but that the APM
itself should be independently powered separately from the servo power
rails?"
Yes. That is one line of thought, one way you could chose to go.
There are many other alternatives to try avoiding noises from servos.
That strongly depends on your setup. If you have too many things hooked up on
your board, you will be in trouble. That's because APM has a thermal protection
there (on the circuitry isolated from the RC system power) the current cannot
exceed 500mA.
Please, take a look here on APM wiki at "Powering the Board":
http://code.google.com/p/ardupilot-mega/wiki/Hardware
Original comment by [email protected]
on 11 Apr 2012 at 11:14
from arducam-osd.
Thanks for the clarification - I rewired my system in this configuration, and
still saw glitching on throttle.
However, I have been powering my cam and VTX also from the main battery - as
soon as I power that from an independent battery the problem disappears. So,
it seems that the engine noise was actually being injected into the 2nd stage
of the minimosd via coupling on the video lines.
I'll run an independent video battery from now on. Thanks for your input on
this.
I agree it's not a defect in minimosd as such but a wiki page clarification
would be really useful I think.
Original comment by [email protected]
on 11 Apr 2012 at 11:18
from arducam-osd.
[deleted comment]
from arducam-osd.
What is the current draw of a GPS, magnetometer, airspeed sensor, and Minim OSD
together? Is it too many for APM1?
Original comment by [email protected]
on 11 Apr 2012 at 11:57
from arducam-osd.
[deleted comment]
from arducam-osd.
I have a very inaccurate ammeter. It did show that my APM1 is using more than
500ma!
GPS, magnetometer, airspeed sensor, and Minim OSD was connected.
I have found this impossible.
Some people are using the same sensor set that i do but they also have Xbee
connected, so their current draw should be even higher than my...
Is there anyone equipped with a accurate ammeter?
Original comment by [email protected]
on 12 Apr 2012 at 10:20
from arducam-osd.
Ok i have actually NEARLY the same issue, but i spotted also:
Arming my board will increase the glitches.. noticable but still readable.
it comes extreme if you power up the motors.
i will go for a secondary source, keep the noisebridge closed since i route
only V-in and V-out. Cam and reciever are still using the mainbattery.
hopefully a success..
if not:
secondary source, open bridge 12v from cam V-In V-Out
if not:
secondary source, open bridge, 12 TO cam V-in V.out, BEC from secondary source
to APM1.
sidenote:
if i disconnect the camera and have grayscreen overlay, i barely see the osd
glitching. so i thought its a sync failure maybe?
Original comment by [email protected]
on 19 Jul 2013 at 3:23
from arducam-osd.
I have same problem here. When copter is initializing i see the osd ( it
flickers a bit ) When arming and starting motors the osd telemetry dissapears .
I'm having a walkera x350 pro with ilook+ that i modded. What should i change ?
I have a bit an electronic background but thats long time ago. Pls use simple
exlanation pls :)
Original comment by [email protected]
on 4 Jan 2015 at 1:26
from arducam-osd.
I too had terrible video flickering and loss of osd information from the
minumosd when activating servos. Originally had digital and analog sides of
minmosd linked and powered from apm. Uncoupling this link and providing the
minumosd analog side with its own battery did not solve problem. After much
trial and error I discovered that bridging the output and input sides of the
apm with the jumper (jm1) was the problem. Removed jumper and supplied separate
power source to input and output sides of apm solved flickering problem and
loss of osd information. Hope this helps.
Original comment by [email protected]
on 23 Feb 2015 at 6:41
from arducam-osd.
Related Issues (20)
- Warnings, Armed and Disarmed Notification Glitching on Panel 1
- Without Mavlink
- Load Custom Firmware Doesn't work
- problem compiling with arduino HOT 2
- OSD shows video but no data overlay + video feed shows noise on power up. HOT 1
- New APM modes not displaying on OSD HOT 2
- show decimals like 0.6m for the altitude. HOT 3
- "Update Charset" on power up with PX4
- kv osd with other controlers ? HOT 2
- GPS Time Stamp.
- Call
- Call Signs HOT 1
- MinimOSD - No overlay following EEPROM Flash HOT 1
- Either Video and no overlay OR unplug Fatshark cam and see grey screen with OSD HOT 2
- Support FrSky S.Port Telemetry HOT 3
- OSD displays data but no video
- Step by step guide
- Flight mode not shown for hexa- and octocopters HOT 1
- Hybrid renamed to PosHold
- Reduce the number of decimals on Lat/Lon on Display
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from arducam-osd.