r/diydrones

▲ 9 r/diydrones+1 crossposts

Kayoumini O4 bad video range?

Hi guys! I recently completed my first build, a kayoumini with DJI O4 (O3 lens mod).

It flies good, but one thing that bugs me is that it has noticeably less range that my Meteor75 pro 04. Is it really just an effect of having a carbon frame + battery placement? Or do you see any glaring issue with antenna placement?

Happy to hear your opinions or anecdotes!

u/Romanspike — 10 hours ago

Servo Motor Problem

Hello all,

I am having an issue with my FPV drone using a servo motor. I am trying to use the servo to drop a tennis ball for my dog. When I bench tested everything, it worked completely fine, but the issue came when I was about to take off. When I have the tennis ball held by the servo's Velcro strap, I get an "RXLOSS" and "BOXFAILSAFE" error like you see above. The receiver also blinks. The second I remove the tennis ball, the drone arms and flies like normal. After looking this up, it seems like the the fact that the servo now has to hold a physical object is drawing power from the rest of the circuitry. Has anyone ever run into this before and if so how have you fixed it?

Below is all the specs I could think of that mattered:

- The drone is a 7in FPV w/ a SpeedyBee F405 V4

- Wiring:

- Servo GND to FC GND

- Servo power to FC 5V

- Servo "switch" wire to FC LED

- Servo: MG90S Micro Servo

Thanks in advance for any help

u/Vegetable-Plate-659 — 9 hours ago

Mario 8 Long Range - First Build

I've finally finished my first ever build, a Speedybee Mario 8 long range / mountain surfer...

I also own an Avata 2, Oxbot Lumo 18 (Wide 04 version) and a GEPRC Vapor D5, but they were all pre-built and configured.

Mario 8 Build List:

-Custom 8S2P 21700 Li-Ion Battery Packs (Reliance RS50 - 10,000mAh & Linkdata 65P - 13,000mAh)

-Speedybee Mario 8 frame

-T-Motor Velox F7 SE 8S FC + V70A SE 8S ESC

-2 x Panasonic 63V EEUFS1J102 capacitor + 5KP36A 36V TVS Diode

-Brotherhobby Avenger 2816 750kv motors

-Gemfan 8040-3 prop's (also have 8040-2)

-DJI 04 Pro Air Unit

-RushFPV Cherry 5.8GHz SMA LHCP Straight Extended Antenna pair 160mm

-UFL to SMA pigtails

-iFlight ExpressLRS ELRS 2.4Ghz Diversity Receiver

-TrueRC 2.4GHz UFL long bardpole

-Foxeer M10Q 250 V2 GPS IST8310 Compass Module

-Vifly finder 2 buzzer

-Ummagrip

I'm using DJI Goggles 3 and a Radiomaster TX15 Max.

I've really enjoyed learning all of the skills to make this build come to life...

-Soldering (far from perfect, but it's passable) -Battery testing, spot welding + assembly

-3d printing + basic CAD design

-Betaflight setup + configuration

-Countless others

A few things definitely didn't go to plan. I fried my first FC, initially fitted the rear legs backwards and printed over 10 versions of the rear GPS / antenna mount, but it was all part of the learning process.

Now on to the next, I'm thinking an AOS UL10 v5 frame for another long range build. Anyone got experience with this frame?

u/Equal_Neighborhood88 — 18 hours ago

Aid needed for quadcopter

We've been building a quadcopter for the past 2–3 months and have worked through a lot of issues along the way. We're currently using Mission Planner, and our ESCs seem to be calibrated and working correctly.

Our current setup:

  • Drone weight: ~1–1.5 kg
  • Motors: A2212 1000KV
  • Flight controller: Pixhawk
  • Battery: 2700mAh LiPo, 7.4V (2S)

The main issue is that, even with a fully charged battery and full throttle, the drone can barely slide around the table and shows almost no sign of lifting off.

We're also having another issue where the propellers keep loosening on the motor shafts during operation.

At this point, we're wondering if the problem is with our power system, propeller setup, battery choice, or something else entirely.

Does anything in our setup immediately stand out as incorrect? Are these motors simply too underpowered for a 1–1.5 kg drone on a 2S battery, or should we be looking elsewhere? Any advice or troubleshooting steps would be greatly appreciated.

reddit.com
u/VIGITHEPRO101 — 16 hours ago
▲ 118 r/diydrones

Custom Sub-250g 2.5"/3" Y4 Frame Design

Hi everyone,

I’ve been working on designing a custom Y4 frame for 2.5" to 3" props, with the ultimate goal of staying under the 250g limit.

Before sending the files to the CNC shop for carbon cutting, I would love to get some external feedback from the community to catch any potential design flaws or issues I might have missed.

Here are the specifications of the frame:

  • Configuration: Y4 (Traditional split front arms, coaxial dual motors on a single rear arm).
  • Motor-to-Motor Dimensions: 121mm width at the front / 124mm width at the rear.
  • Carbon Thickness: 3mm for the arms, 2mm for the top-middle and bottom plates.
  • Electronics Stack: Designed for 25.5 x 25.5mm AIO, with 25mm of vertical clearance.
  • Motor Mount Pattern: 9x9mm (planning to use 1404 motors).
  • Canopy: Still a work in progress, but it will be 3D printed in TPU to house the camera and video system.

I will be cutting this from T700 carbon fiber.

How does the geometry look to you guys? Any thoughts on the motor spacing, arms stiffness, or general layout for a micro Y4?

Thanks a lot for your help!

u/Cocoj2001 — 1 day ago
▲ 5 r/diydrones+1 crossposts

First esc swap

Doing my first swap
Esc is blueson a2 and the fc is a axisflying f722 eco
Does the plug seem to be correct or should I just direct solder?

u/Valuable-Key-5964 — 23 hours ago

Where to start?

Hi, I'm a complete beginner when it comes to drones (building/flying) hobby,

Where do I start?

Any guidelines? Megathread?

Is there any place I could get some Advice?

Thank you for the answers in advance!

reddit.com
u/MrCrawcikTv — 1 day ago

Employers expecting too much?

I know ardupilot/os drones are a pretty vague industry with lots of applications, but is anyone else experiencing employers wanting them to wear literally all the hats??
I am in Aus and I get excited when I see an ad for an ardupilot engineer/drone builder. But then it seems that they want a bunch of things on top of it like - oh, also keen to do 4wk field stints (sorry no... i have a family that I enjoy spending time with), and also bringing forward a knowledge of geophysics, good at 4wd in the bush etc etc.
Do these people actually get applicants? For all of those roles combined I feel like you could charge far more than the ~100k/y salary that people are offering... seems a bit ridiculous.

reddit.com
u/geosofty — 1 day ago
▲ 15 r/diydrones+1 crossposts

Analog signal breakup and complete black screen?

Hey so I just got a Geprc Vapor D5 analog today, and I am using it with my HDzero BoxPro Goggles. Ive had 2 issues with the video transmission so far.

first, when I was flying during the daytime the signal was pretty good, I flew 600m away at one point and it was crystal clear, then later I flew high above my head and lost video for a full second. Could this be from the VTX overheating? It was 105 degrees outside so pretty hot.

the second issue that evening, I was flying about 20 yards away from me, when the video in my goggles went straight to black screen. No static, no warning at all. Luckily I was only a few feet from the ground, but I cant have that happening in the future obviously

Does anyone know what could be causing these?

(Also, Ive been flying a tinywhoop with these goggles and I havent experienced issues like this)

u/duplicate_we1 — 2 days ago

ArduPilot Paradox: Uncommanded indoor flyaway after failed calibration/reconnection. No log generated (LOG_DISARMED=0). How is this possible?

Hey everyone,

I am trying to reverse-engineer a terrifying indoor bench accident that resulted in an uncommanded, full-speed takeoff and crash. I need help understanding ArduPilot's internal safety architecture because what happened feels like a catastrophic firmware/hardware lockup.

⚠️ CRITICAL CONTEXT TO PREVENT MISUNDERSTANDINGS:

* NO LOG EXISTS (0 BYTES): Because LOG_DISARMED = 0 and the crash happened instantly, NO log file was ever initialized or written for this event. The SD card is verified perfectly healthy (working fine before and after the crash), but there isn't even a 0-byte file header for this event.

* STANDARD DIRECT WIRING: The ESCs are plugged directly into the Cube Orange MAIN OUT ports. No companion computers, Lua scripts, multiplexers, or direct receiver-to-ESC passthrough wiring.

The Hardware:

* FC: Cube Orange (ArduCopter V4.6.3)

* RC System: Radiolink Transmitter & Receiver (SBUS)

* Hardware Switch: Physical safety switch button was disabled (`BRD_SAFETY_DEFLT = 0`).

The Exact Sequence of Events:

  1. We plugged in the flight battery. The drone sat static on the bench.

  2. We successfully connected to the laptop GCS via telemetry and attempted a calibration (which we did not complete).

  3. We intentionally disconnected the telemetry link with the plan to reconnect it immediately.

  4. The glitch begins: On the second attempt, telemetry completely refused to reconnect. The drone was unresponsive to the GCS. No arming commands had been sent at any point since plugging in the battery.

  5. Surprised by the telemetry dropout, we assumed the RC transmitter might be the issue. We power-cycled the transmitter (off, then on).

  6. Crucially, when the transmitter booted back up, the physical throttle stick was unintentionally resting all the way up (100%).

  7. The exact millisecond the receiver re-linked with the radio, the motors instantly spun up to absolute maximum power, rocketed 7 meters into the ceiling, and crashed.

The Paradox:

If the flight controller was healthy and disarmed, the ArduPilot motor library should strictly mask/kill all PWM outputs, regardless of what raw SBUS throttle data the receiver delivers upon re-linking.

However, because telemetry had just failed to reconnect right before this happened, and absolutely zero bytes of a log file header were generated, we suspect the Cube Orange's main processor may have entered a frozen, corrupted, or "watchdog loop" state during the failed calibration/reconnect sequence.

My Questions for the Experts:

  1. Is there a known edge-case bug where a failed/interrupted calibration or telemetry disconnection can cause the I/O driver layer to lock up or lose its "disarmed motor masking" safety logic?

  2. If the main loop freezes or crashes, can the Cube Orange's hardware default to passing raw timer outputs/SBUS inputs straight to the MAIN PWM rails without ArduPilot's safety code actively blocking it?

  3. What is the definitive way to build a bulletproof hardware firewall on the bench to guarantee that an internal flight controller lockup cannot default to an unmasked, full-throttle output state?

Thanks for reading, and I'd appreciate any insights from anyone intimately familiar with the Cube Orange hardware and ArduCopter output stages..

reddit.com
u/osamahh9 — 1 day ago

Can’t figure out footage issue

Hi there, this is the FRSKY EMAX tinyhawk III. Originally the regulator on my flight controller got fried so I had to replace the flight controller and the vtx. Once I replaced those I tried turning it on (first image) and I concluded that since the text was displaying the vtx was fine and the old camera was fried. So I replaced the camera (second image) and I’m getting the same issue. The camera is warming up so I know it’s getting power from the solder and the splice

u/No-Setting-3201 — 1 day ago

4in1 ESC vs individual ESC for 1.6”to 2 “ Cinewhoop

Since I am building a flight controller from scratch and programming it. I was wondering if the extra weight from four individual ESC justify for its simplicity, since you only need to give PWM signal, plus it powers my board. Or should I use 4in1 ESC which uses DShot protocol but allows rpm feedback and possible current battery voltage feedback without having me creating a voltage divider on my flight controller.

reddit.com
u/GateCodeMark — 1 day ago
▲ 4 r/diydrones+1 crossposts

First esc swap

Is there anything I need to know?
Fc is an axisflying eco f405
I’m looking at the wiring diagrams and the connector pins seem to line up but I’m not exactly sure still

u/Valuable-Key-5964 — 1 day ago
▲ 24 r/diydrones+4 crossposts

Fellow Sherlocks, given only this limited video footage, can your sharp insights pinpoint the cause of the drone crash?

u/KaiMaxkgo — 3 days ago
▲ 190 r/diydrones

Lace II “Aero”: 3D-Printable Frame Release

Greetings again from Aeroptera Design. We are proud to announce the much anticipated release of Lace II “Aero”, a 3D printable quadcopter frame that you can 3D print yourselves.

Our last post for the release of Lace-Veyric generated a lot of interest in 3D printed drone frames, and lots of people have reached out about Lace II, which was a work in progress at the time. To make the 3D printing process more accessible, we’ve written an updated User Manual for Lace II, filled with tips to help you successfully build your own Lace drone.

This release includes the comprehensive download package for Lace II “Aero”, including STL files ready for 3D printing, and design files in STEP and 3DM format. A copy of our new manual is also included.
Downloads are completely free, the links are on our website Aeroptera.xyz

Feel free to reach out to us at TeamAeroptera@gmail.com. We would love to see your Lace builds! Comment below with questions and we will try our best to answer them.

We are sponsored by Polymaker, whose advanced 3D printing filaments helped make Lace possible.

u/Quanta76 — 4 days ago

First DIY build parts list for bait-dropping fishing drone, looking for feedback

Hey, this will be my first DIY drone, and I know that I might be way over my head with this, but I'd like to build a drone for fishing and dropping 10lb baits with a max trip distance of 1,100 yards, where it would lose the payload about halfway through the trip.

I'd like to fly with ArduPilot, but it doesn't have to be fully autonomous — I just need to know approximate distances.

Lmk if there are any improvements or ways I could reduce cost, or if there's anything else I'm missing.

Component Weight (g) Price (USD) Link
Frame 550 $89.99 X600 Hexacopter Frame
Motors 360 $210.00 F100 2810 Motors
ESCs 100 $100.00 Skywalker 50A ESC
Flight Controller 42 $150.00 Pixhawk 6C Mini
Battery 380 $195.00 Lumenier NAV 15000mAh 6S
Propellers $18.00 TBS Propellers
Remote Control $125.00 Zorro Radio Controller
FPV System 30 $250.00 Caddx GM1/GM2/GM3 Gimbal
GPS 32 $45.00 Holybro M10 GPS
Servos 100 $10.00 AliExpress Servo
Goggles $250.00 Walksnail Avatar Goggles L
Power Distribution 20 $10.00 Holybro PDB
Receiver 10 $20.00 ELRS Receiver
Radio ID $40.00 Radio ID Module
Total 1624 $1,512.99
u/Fattdipper — 3 days ago
▲ 2 r/diydrones+1 crossposts

Build suggestion

I wanna build an fpv thats comparable in perfomance with avata 3.5inch upgraded. Needs to have atleast 10 mins flight time and a naked go pro. Kindly suggest me parts

My current idea

Speedybee 3.5 (or) Cinelog 35 v2
micoair h7 aio 45A
2104 flywoo 1750 kv motors
rp1 reciever
GepM10Q GPS
Flywoo Wide air unit kit

G3 goggles
Go pro LIT HERO or HERO 11 Naked
Pocket Tx

6s lion build

I am new to this so kindly help me out

reddit.com
u/MokkaManMaxx — 3 days ago
▲ 5 r/diydrones+1 crossposts

Switching to analog

I currently own DJI goggles 3, radiomaster boxer ELRS, meteor 75 pro 05, and parts for a custom 5” 04 pro. Now I want to switch everything to analog since I save money + I don’t care about image quality.

My plan is this:
Sell the 04 pro air unit for the 5”
Sell DJI goggles 3
Sell the meteor 75 pro 04

And then buy this:
Skyzone 04x pro
Analog VTX for my 5”
Air 65 freestyle
What will I miss out on the DJI goggles 3 and is this valid?

reddit.com
u/Left_Frame5564 — 3 days ago