Posts: 16 Threads: 6 Likes Received: 2 in 2 posts Likes Given: 18 Joined: Jan 2023 Reputation: 0 20-Jan-2023, 12:05 AM (This post was last modified: 20-Jan-2023, 01:57 AM by pofotiou.) Hello guys i need your help!
Im having black lines and sometimes total black outs
with no osd in the video feed.
This problem occurs only with 6s lipo.
With a 4s lipo the video feed is clean.
I soldered a capacitor in the power lead and powered the camera from the vtx but nothing changed.
Thank you! Posts: 4,550 Threads: 38 Likes Received: 1,245 in 1,064 posts Likes Given: 430 Joined: Aug 2020 Reputation: 118 6S is slight more noisier compared to 4S to introduce black lines but the total black out part is what confuses me.
Can you provide some details on the hardware? Posts: 16 Threads: 6 Likes Received: 2 in 2 posts Likes Given: 18 Joined: Jan 2023 Reputation: 0 (22-Jan-2023, 11:14 PM)kafie1980 Wrote: 6S is slight more noisier compared to 4S to introduce black lines but the total black out part is what confuses me.
Can you provide some details on the hardware? I have the tyro119 from eachine. https://m.eachine.com/Eachine-Tyro119-25...-1700.html ![[-]](https://intofpv.com/images/collapse.png) • Posts: 6,096 Threads: 172 Likes Received: 2,283 in 1,830 posts Likes Given: 4,727 Joined: Feb 2019 Reputation: 100 sounds like there is an issue with the osd chip, you could wire the cam directly to the vtx to check it happens witjout osd between either • Posts: 16 Threads: 6 Likes Received: 2 in 2 posts Likes Given: 18 Joined: Jan 2023 Reputation: 0 (28-Jan-2023, 07:01 PM)hugnosed_bat Wrote: sounds like there is an issue with the osd chip, you could wire the cam directly to the vtx to check it happens witjout osd between either Without osd the issue solved! Strange, i generally thought black lines in video feed means that the camera or vtx is underpowered. • Posts: 930 Threads: 69 Likes Received: 339 in 253 posts Likes Given: 154 Joined: Dec 2021 Reputation: 19 (24-Feb-2023, 01:38 AM)pofotiou Wrote: Without osd the issue solved!
Strange, i generally thought black lines in video feed means that the camera or vtx is underpowered. Great its patched round, but lets seek a solution with OSD? Assume this issue started immediately from new build? Black Lines can be a number of things, but from my experience mostly caused by motor interference creeping into video line. Was pretty common in the days of F1 and F3 Flight Controllers. As you have now jumped across the FC board taking camera to VTX direct, that's the greatest suspicion, though it ""could" be the wiring that you are now avoiding. Had you spiral twisted the FC to VTX and the Camera to FC wiring? What is your PID loop frequency? What is your DShot setting? BUT...............I note however that they list the recommended battery as a " 5S 1300-1800mAh 50-85C". This is quite unusual, few makers ever LIST 5S, and it raises my suspicions that they know that 6S pushes it harder than it should/can operate! They are though listed as 1800kv motors, so much more in the range for 6S than 4S (or even 5S). Doesn't "sit" right with me! • Posts: 6,096 Threads: 172 Likes Received: 2,283 in 1,830 posts Likes Given: 4,727 Joined: Feb 2019 Reputation: 100 24-Feb-2023, 10:06 AM (This post was last modified: 24-Feb-2023, 10:42 AM by hugnosed_bat.) 1800kv matches 6inch well, dont try to find a fault in general. you might believe its a 5inch. 6s 1800kv on 6inch would be unusual the tyro119 was the best big tyro about a value for mone and concept, it never climbed true attention from the community. at least the concept, its not tooo good without osd  • Posts: 16 Threads: 6 Likes Received: 2 in 2 posts Likes Given: 18 Joined: Jan 2023 Reputation: 0 (24-Feb-2023, 06:50 AM)BadRaven Wrote: Great its patched round, but lets seek a solution with OSD? Assume this issue started immediately from new build?
Black Lines can be a number of things, but from my experience mostly caused by motor interference creeping into video line. Was pretty common in the days of F1 and F3 Flight Controllers.
As you have now jumped across the FC board taking camera to VTX direct, that's the greatest suspicion, though it ""could" be the wiring that you are now avoiding.
Had you spiral twisted the FC to VTX and the Camera to FC wiring?
What is your PID loop frequency?
What is your DShot setting?
BUT...............I note however that they list the recommended battery as a "5S 1300-1800mAh 50-85C". This is quite unusual, few makers ever LIST 5S, and it raises my suspicions that they know that 6S pushes it harder than it should/can operate!
They are though listed as 1800kv motors, so much more in the range for 6S than 4S (or even 5S).
Doesn't "sit" right with me! I always twist the signal and ground wires. The PiD loop frequency is 4K with DShot300. I also use bidirectional dshot with rpm filtering. Maybe the signal wires need copper and adhesive tape. Also i can try to solder one more capacitor or solder one more ground wire from the power lead. • Posts: 930 Threads: 69 Likes Received: 339 in 253 posts Likes Given: 154 Joined: Dec 2021 Reputation: 19 OK discount that then.
Is VTX powered direct from battery (or on seperate regulator, not FC supplied?) • Posts: 16 Threads: 6 Likes Received: 2 in 2 posts Likes Given: 18 Joined: Jan 2023 Reputation: 0 26-Feb-2023, 09:16 PM (This post was last modified: 26-Feb-2023, 11:17 PM by pofotiou.) (26-Feb-2023, 06:20 PM)BadRaven Wrote: OK discount that then.
Is VTX powered direct from battery (or on seperate regulator, not FC supplied?) The VTX is powered from the FC 10V pad. Not from a seperate regulator. • Posts: 1,490 Threads: 92 Likes Received: 574 in 468 posts Likes Given: 0 Joined: Nov 2020 Reputation: 27 Blackouts are almost always brownouts - ie not enough power. It usually happens in punch outs.
#1 to try is powering VTX from 9/10V on FC if it exists.
If there are horizontal periodic black lines or other noise, there is:
1. twist signal with gnd
2. LC filter on 5V / vtx power source
3. Common gnd everything video related (ie same pad).
4. Brokent OSD chip
5. use RF coax to noise proof Posts: 16 Threads: 6 Likes Received: 2 in 2 posts Likes Given: 18 Joined: Jan 2023 Reputation: 0 (04-Mar-2023, 12:57 AM)romangpro Wrote: Blackouts are almost always brownouts - ie not enough power. It usually happens in punch outs.
#1 to try is powering VTX from 9/10V on FC if it exists.
If there are horizontal periodic black lines or other noise, there is:
1. twist signal with gnd
2. LC filter on 5V / vtx power source
3. Common gnd everything video related (ie same pad).
4. Brokent OSD chip
5. use RF coax to noise proof I will try the above solutions. My question is, if it was brownouts should the problem also occur with 4s lipo? • Posts: 1,490 Threads: 92 Likes Received: 574 in 468 posts Likes Given: 0 Joined: Nov 2020 Reputation: 27 I am "electrical engineer" but my job is software. Like JS and C#. So its half educated guesses.
On all my AIO FC, ESC is powered from linear regulator 8-10V for the Fortior gate driver, and to 3.3V LDO for BB21. Because of switching there is some electrical noise from FET gates.
But the bigger problem is the 5V on the FC. This comes from sync switching regulator. Imagine you have 10V you want to turn to 1V. So you switch on and off 10% of time. But this is battery with voltage sag, so when voltage drops to 8%, you need switching 12.5%
If the vtx doesnt have good filtering, this will cause black lines noise.
I think you need low ESR cap on vtx voltage supply.. maybe just 47uF. Or LC filter which is cap + inductor.
It wouldnt hurt to keep the yellow signal wire far away from ESC |
