Just a quick question or two please... does the latest Minimosd board contain a thermal cut-out please?
Does it require a signal from the video camera to operate?
I am having a lot of issues with my overlay coming and going, am trying to work out why, seems to get pretty warm at times.
Have tried various power setups, but even with a separate 12V battery (to analogue part of board and camera/video tx), find I am still losing the overlay - overlay works fine on the ground, even with full power, but as soon as I launch, the overlay disappears after about 20secs. I land, press reset, overlay is back, but then same problem.
(I earlier tried connecting the jumpers, tying the analogue/digital board parts, powering the board with the 5V from APM2.5, but as soon as I opened the throttle, the overlay 'static'ed and disappeared completely after 15% throttle. Form the reading I've done so far, this is a common problem, so I'm not surprised.)
I have been seeking (and receiving!) help on the minimosd extra forum, so the full description of my issues is on there if anyone interested. :)
Any help gratefully received! :)
Same problem Osd stops working after giving to much throttle or using bigger props.
I know, this thread is really old, but I suffered from the same problems.
I managed to get rid of this problem, so I want to share my solution.
The APM has a very poor 5V output to the telemetry port without any filter. You can see, that there is noise with +-0.2V, that causes crashes of the digital part. Especially when the motors add noise to the powerline.
Noise from APM:
So I build a seperate sbec with an LC-Filter to power the minimOSD:
This looks much better:
Now, my minimOSD runs stable.
Have you considered the RF current induced in video in /out wires? I had some OSD issues every time i flew near RF towers. Once even the gimball I2C bus froze. Both have in common long wires.