this Mini osd issue has been put in many forums but it’s still has not been solve ,hope get a good luck this time
I fly sky suffer X8 installed pixhawk and osd.my problem is the OSD data disappear after take off ,but if I push the reset button in the Mini osd after land ,the osd data appear again .I found the problem is the OSD will disappear when push the throttle to full power in the ground test .I guess it’s the power droup in mini osd. the power supply of the osd is from two stage ,the 5V side is from pixhawk which is about 4.85(it should be 5V,but I don’t know why ,maybe it’s the error of the multimeater ),and the 12V side is from video transmitter which get the power from the battery .I check the 12v side voltage when I push the throttle to up ,the voltage is unstabe .
in order to find out the problem I try two way.
First ,I put a UBEC in the 12V side of the OSD ,and ajust to 12.02V(Itry to ajust to accuracy 12V,but it’s really hard to do that ) ,when I power the airplane ,the out put of the UBEC is keep in 12.02 very good ,I didn’t get ubec in the 5v side of osd ,because it’s really hard to put a ubec in the 5V side,meanwhile the flight control provide a very stable output of 4.85V when increase the throttle .I don’t think this osd issue is cause by the 5V side power ,because if it’s cause by 5v side ,why the osd still overlay in the Ground .but this way can’t fix the isssue
secound ,I buy another osd and set to just power from 12V side .first I didn’t installed the UBEC,the OSD data work sometimes,But most of the time it’s disappear ,then i installed the ubec and set the output to 12.02V ,the osd data appear most of the time,but still disappear intermittent .it some times disappear after take off but the osd data overlay again after several minis in the air .
I have google this issue for a long time ,some people said it’s because the mini osd is very sensitive to voltage drop ,I do agree with that ,but do any body fix the issue ,we can’t provide the perfect voltage even with the UBEC.