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61
Hardware / Re: Power and signal distribution PCB for mini Revo flight controllers
« Last post by karla on August 02, 2022, 04:02:00 am »
Good!
Yes, I am interested.
Its really a tough soldering job to get the servos connected and also the Amp limitations.
Can you give more specifications like size and weight?
Best
Karl
62
Hardware / Power and signal distribution PCB for mini Revo flight controllers
« Last post by trust on August 02, 2022, 03:46:13 am »
As a part of our work with developing eVTOLs in the Hellaplanes, recently I designed a PCB that greatly simplifies connecting the mini REVO flight controllers for use in multirotors and winged aircraft. It provides two separate 5V 3A supplies, one for the receiver and flight controller (and other devices such as GPS, OPLINK, and OSD), the other for servos. If you use BESC, it can be used in place of the second 5v supply. Up to 6s battery input.
We found the extra power from servos could occasionally glitch the flight controller when they were grouped together - this prevents that.
It also has a socket for OSD, and some simple circuitry for our wing switch.
We normally use either cPPM serial or s.bus serial connections to receivers - this allows either up to 11 or 12 PWM outputs from the flight controller.
If anyone is interested, we can make some available for a modest cost.
63
Hardware / Re: Hobbyking discontinued Revo & Revo Mini
« Last post by trust on August 02, 2022, 03:10:22 am »
We've been buying the mini REVO flight controllers on ebay. Here's link for one:
https://www.ebay.com/itm/255629024375
They need to have firmware changed to latest version, but they work fine.

We've also developed some power & signal distribution PCBs that work with these controllers. I'll post about it separately.
64
Hardware / Re: Hobbyking discontinued Revo & Revo Mini
« Last post by TheOtherCliff on August 02, 2022, 12:00:56 am »
https://forum.librepilot.org/index.php?topic=4965.msg33721#msg33721

There are several places that sell Revo and Sparky2 in this thread.

PorcupineRC sells them for for USD $44 and $40 free shipping.  Other places I have not personally verified recently.
65
Hardware / Re: Hobbyking discontinued Revo & Revo Mini
« Last post by Alex H. on August 01, 2022, 08:43:50 pm »
2022 and one can't find any or only few at high prices, the Revo or sparky2...

Are there other boards that are available on the mark and can be used with librepilot?
66
Vehicles - MultiRotors / Re: Motor propeller axle is offset... Can I repair it?
« Last post by Alex H. on July 31, 2022, 11:02:14 am »
Thanks both of you for replying.

I have open up the motor, by taking the safety washer out, no magnet is out of its place, no dirt or any other parts inside it.
If I push the shaft(axle) from bottom where the safety washer is and spin the motor it will not hang anymore...

It will be good I idea to file the lower part of the rotor, maybe later I will take care of it and use it as spare part.
Meanwhile I have bought a new motor with ESC.

Just found out that I need a drone license...

67
Vehicles - MultiRotors / Re: Motor propeller axle is offset... Can I repair it?
« Last post by trust on July 30, 2022, 08:40:19 am »
Ditto on his suggestions. Another factor that I've seen is magnetic particles getting stuck inside motors on the magnets, and very hard to see. Sand is a killer, as it often has tiny iron particles that can get in there and stick to the magnets. Even just dirty areas may have tiny iron particles floating around. Very difficult to remove. Sometimes using compressed air blasted in there will move it out of the way. There are canned compressed gas "cleaners" that also might work.
68
I have straightened bent shafts.  Spin by hand and/or slowly by battery.  It is not easy and requires careful attention...  It is good if it looks perfect to your eye.

Smooth shaft can be gripped with pliers through small piece of paper towel folded several times.  Threaded shaft you should usually put the spinner nut on and grip that with pliers through small piece of paper towel folded several times.

If it is grinding in some place it may just be dirt in the motor.  Dirt is usually obvious.  If it is obvious, take it apart.  Sometimes it is grub screws and sometimes E clips.  Else, it may be that a magnet has come loose.  Easiest is to buy a new motor.  I usually buy motors 5 at a time just for this reason (ESCs too)...
69
Vehicles - MultiRotors / Re: my Drone doesn't go straight up...
« Last post by TheOtherCliff on July 29, 2022, 08:13:00 pm »
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Vehicles - MultiRotors / Motor propeller axle is offset... Can I repair it?
« Last post by Alex H. on July 29, 2022, 11:47:18 am »
Due to my drone pilot inexperience, I have damaged a little bit on of the motor propeller axle,
for which now when it's turning it is making a little bit of noise when throttle, and when hand turned I can feel it hanging in one place...

Is there a way to make the axle straight again, or should I buy a new motor?
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