Do-Nut-filMe [Donut-3"] - cheap cinewhoop (updates!)

By KM|fpv on Jun 25, 2020

4  286  2

seriously, didn't know that this day will ever come: i'll build my own cinewhoop and it's a classical, well known one.
bought this one cheap second-hand (the picture is actually from the seller!) for 25 EUR incl. shipping costs!

most of the parts are already there, excluding the frame! but i couldn't wait any longer to present the newborn in my fleet.

UPDATE I: oh i hate the lettering on the omnibus flight controllers. it's always too small and if you didn't double check your wiring, you blow something, like i did... i connected the vbat not to the vbat input, i accidentally connected vbat to the current input and the holy smoke came up. damn it! maybe i have another omnibus laying around, and eventually i can merge those two boards to have one (change the stm32 chip). time for a new tool? hot air solder station?

UPDATE II: yesterday, i've received my new Aikon F7 board and i really love it from the first moment! never had to solder so few things and finished a build this fast. just solder 6 wires for the esc and power, the 4 wires for the foxeer micro, 3 for the receiver and 5 wires for the vtx. done! okay, that's most of the time this few solder points, but this time it wasn't any hard to solder. this board is well layout! also there are two jumpers for the vtx to bridge for vbat or 5v and pit and always power, which both were already set to my likings (vbat and always on).
after this was finished, i needed to flash latest betaflight 4.2 and pasted my cli things like osd, aux and set the ports. was done in about 15 minutes from unboxing the fc to first hover.
now i'm looking forward to get a proper insta360go mount, find a usb-L-adapter and speedybee-bluetooth module.

UPDATE III: I changed the motors from iflight xing 3600kV to emax rs1606 4000kV. also changed the speedybee bluetooth module to the flywoo nano bt 2.0 (so tiny!). first hover worked fine with way less throttle than before AND i could do it with my GNB 3s 520 mAh.

UPDATE IV:
As of today, the receiver is now an ExpressLRS diy 20x20 868MHz, seated in an 3D printed custom part.

UPDATE V:
custom ducts, or prop guards in this case. No more Bluetooth needed. Testing the best LiPo/propeller combinations: 4s 500mAh or 4s 650mAh or something else?

UPDATE VI:
changed the 4in1 esc to the 20A one made by racerstar (maybe racerstar and uruav are the same? Both websites look identical!), but now only DSHOT300 is possible. But all my esc are now running bluejay firmware.

sneek peak:


longer flight...what it usedd to be:

some time ago, i was testing how to fly a cinewhoop:

Photos

Part List

Frame

Donut" 3 Inch 140mm H-type Frame Kit 3D Printed + Carbon Fiber for RC Drone FPV Racing 75.5g (5 builds)
Banggood.com
$29.99

Flight Controller

Aikon F7 Flight Controller (4 builds)
Hobbyrc.co.uk
See Site

ESCs

Racerstar RS20Ax4 20A 4 in 1 Blheli_S Opto ESC 2-4S Support Dshot150 Dshot300 for RC FPV Racing Drone
M.racerstar.com
$22.59

Motors

4 x iFlight XING 1408 3600KV
Rotorama.de
See Site

Propellers

2Pairs HQ Prop Duct 3 Tri-Blade 3" Cinewhoop Propeller For FPV Racing (5 builds)
Banggood.com
$3.49

Propellers

2 Paare Gemfan D76 76 mm 3-Zoll-5-Blatt-Propeller für CineWhoop RC Drone FPV Racing
De.banggood.com
$2.69

FPV Camera

Foxeer Razer Micro 1/3 CMOS 1.8mm Lens 1200TVL 4:3/16:9 NTSC/PAL Switchable FPV Camera For RC Drone (8 builds)
Banggood.com
$19.19

FPV Transmitter

Eachine TX805 5.8G 40CH 25/200/600/800mW FPV Transmitter TX LED Display Support OSD/Pitmode/Smart Audio (18 builds)
Banggood.com
$19.99

Antenna

2 stücke Foxeer 5,8G Lutscher 3 2,5DBi Omni FPV Antenne RHCP GeradeMMCX / AngleMMCX für RC Drone
De.banggood.com
$13.84

Receiver

ExpressLRS/ExpressLRS
Github.com
See Site

Batteries

2 x Gens Tattu 14.8V 650mAh 75C 4S1P Lipo Battery With XT30 Plug For RC FPV Quadcopter (4 builds)
Banggood.com
$34.26

Batteries

Tattu 11.1V 850mAh 75C 3S1P Li-Po Battery Pack with XT30 Plug for 150 & 180 Size Quadcopters (5 builds)
Amazon.com
$16.28

Batteries

4 x GNB LiPo Battery 4S 500mah 14.8V 90C 180C XT30 for FPV drone Mini
M.alibaba.com
See Site

Radio

Jumper T-Lite 16CH Hall Sensor Gimbals CC2500/JP4IN1 Multi-protocol RF System OpenTX Mode2 Transmitter Support Jumper 915 R900/C (21 builds)
Banggood.com
$69.99

Radio

Flysky FS-NV14 2.4G 14CH Nirvana Transmitter with iA8X Receiver 3.5 Inch Display Open Source (19 builds)
Banggood.com
$179.00

Radio

[US$83.99~93.99] JumperRC T-Lite V2 2.4GHz 16CH Hall Sensor Gimbals 150mW Built-in ELRS/ JP4IN1 Multi-protocol OpenTX Remote Con
See Site

Goggles

ORQA FPV.One OLED FPV Goggles + Free Bonus (FPV.PRO Antenna Set, FPV.Connect, FPV.Battery) (4 builds)
Getfpv.com
$649.99

Goggles

FatShark Dominator V1 Headset System Goggles Video Glasses 640 X 480 VGA
Goodluckbuy.com
$270.49

HD Camera

Hawkeye FIREFLY Q6 Airsoft 1080P HD Multifunktions-Sportkamera für FPV
Banggood.com
$60.59

HD Camera

Insta 360 Go AI Auto Editing Hands-free Smallest Splashprooof FlowState Stabilized Sport Camera (8 builds)
Banggood.com
$203.90

HD Camera

[CA$109.65 5% OFF] Mobius Full HD Sport Kamera 1080P 30FPS 720P 60FPS Für Multirotor rc teile from Spielzeug Hobbys und Roboter
See Site

Misc Parts

0,4 g Flywoo T-NANO V4.0 3,3-5 V Bluetooth-Modul 15,6 mm * 12 mm Multi-Rotor-Teil für FPV Racing RC-Drohne
De.banggood.com
$7.42

Video Receiver

Eachine PRO58 RX Diversity 40CH 5.8G OLED SCAN VRX FPV Receiver for FatShark Goggles (37 builds)
Banggood.com
$34.97

Video Receiver

ImmersionRC rapidFIRE w/ Analog PLUS Goggle Receiver Module (180 builds)
Getfpv.com
$159.99

Radio Module

JUMPER AION ELRS – avion à haute fréquence 2.4G TX NANO, avec aile fixe, avec télécommande
Fr.aliexpress.com
$35.47

Radio Module

FrSky R9M Lite 900-MHz-Sendermodul Bis zu 1 W HF-Leistung mit R9 MX OTA ACCESS Langstreckenempfänger-Kombination mit montierter
See Site

Battery Charger

URUAV U3 18W 2A/3A Type-C Battery Balance Charger for 2-3S LiPO/LiHV/LiFe/Lilon Battery
Banggood.com
$9.63

Battery Charger

Online-Shop Ultra Power UP-S6 6x4,35 watt DC 1 s Balance Ladegerät Entlader Lade Hub 6-in-1 ladegerät für RC Micro MX MCPX Li
De.aliexpress.com
See Site

Battery Charger

Online-Shop Ursprüngliche SKYRC IMAX B6 MINI Balance RC Ladegerät/Entlader Für RC Hubschrauber Wieder spitze NIMH/NICD Flugze (6 builds)
De.aliexpress.com
See Site

Battery Charger

US $66.99 |HTRC T240 DUO AC 150W DC 240W 10A Touchscreen Dual Kanal Batterie Balance Ladegerät Entlader Für RC spielzeug Freie
De.aliexpress.com
See Site

Soldering Iron

MINI TS100 Digital OLED Programable Interface DC5525 Soldering Iron Station Built-in STM32 Chip (258 builds)
Banggood.com
$49.99

Tools

Pro'sKit 900-015 Helping Hands Soldering Aid (2 builds)
Amazon.com
$10.00

Tools

Wowstick 1F+ 64 In 1 Electric Screwdriver Cordless Lithium-ion Charge LED Power Screwdriver From XIAOMI ECO-System (21 builds)
Banggood.com
See Site

Accessories

Orqa FPV.Connect (2 builds)
Shop.orqafpv.com
$68.99

Accessories

Happymodel Moxon 2.4GHz antenna for ExpressLRS TX module SMA plug for ES24TX Series For DIY FPV Racing Drone
Xt-xinte.com
$3.63

Accessories

FatShark Face Plate Frontplatte V2 mit Lüfter für die Fatshark Dominator kaufen | FPV24.com
Fpv24.com
See Site

Accessories

TATTU 2500mAh 2S1P 7.4V LiPo Battery DC3.5mm With LED Indicator Button For Fatsahrk Aomway Skyzone Eachine Goggles (7 builds)
Banggood.com
$24.95

Accessories

AG01 MINI CNC Hall Gimbals for TX12 & Zorro
Radiomasterrc.com
See Site

Accessories

ESP8285 ESP-M3 integr. 8Mbit Flash WiFi WLAN Serial Modul +25 dbm Low Power 20µA
Amazon.de
See Site

Accessories

Androegg ESP8285 ESP-M1 integr. 8Mbit Flash WiFi WLAN Serial Modul +25 dbm Low Power 20µA
Amazon.de
See Site

Misc Supplies

AchilleΣ Plus for Eachine PRO58 / RealAcc RX5808 Pro Plus OSD
Achillesfpv.eu
See Site
Show stores (19)

Discussion

Sign in to comment

kushang999   Jul 27, 2021  

whats the batteries you use on 1606 4000kv??

KM|fpv   Jul 27, 2021 

I've written the batteries in the list above, but here you go:

  • Tattu 3s 850mAh
  • Tattu 4s 650mAh
  • GNB 4s 500mAh

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