Category Archives: Learning

RMILEC Signal Converter V3 SBus PWM PPM

RMILEC Signal Converter Signal Analyzer V3. If you want to test or fly with a SBus receiver without a flight controller the old fashion way, you are in luck; this signal converter is able to convert SBus signal into PWM signal and two-way PPM signal.  It can also convert PWM signal into PPM signal and SBUS signal, or convert two-way PPM signal into PWM signals and SBUS signals.  Amazing!  I will take some video to give you some ideas of what you can potentially use it for, probably more ideas than I can suggest.

Besides debugging signals, we plan to use the FrSky R9 MM, the latest long-range 900MHz mini receiver on a plane, so one option is to use RMILEC signal converter and connect directly to each servo leads.  The RMILEC Signal Converter carries a small footprint, about a size of a SD card.  There is also an older version that incorporate a LiPo alarm of this converter, in that way it also function as a low voltage warning system…

F2S Autopilot GPS OSD RSSI All-In-One Flight Controller

Amazing F2S all-in-1 flight controller, I think this is worth sharing.  The F2S coverts your fixed wing planes into a drone with GPS return home.  In addition, it adds all the telemetry information on your screen.  Best of all, no tuning needed.

We configure the F2S on an Eachine Mini Skyhunter Racer for this episode with a Mobius Mini. It does a nice turn on Return Home and circles in a 8 formation upon returning and begins to climb that 328 ft (100 m) preset. I have been flying this plane without Gyro, so at Manual mode, I still retain the full experience and know I can bail out at any time. The Mini Skyhunter is a fast plane, I noticed the Heading Mode seem to zigzag-drift occasionally, other than that, the rest is good so far. I get the most 11 GPS satellites so far. Here is a video of everything you need to get setup.

Pros – can be installed and tested under an hour, multiple flight modes and comprehensive OSD
Limitations or maybe good – little customization or tuning available or needed. Setup by radio, no computer required…

DeviationTX Walkera Devo Transmitter Hacking

One of the best kept secret of a Walkera transmitter is the ability to support multiple protocols using deviationtx firmware. So if you are flying a selection of models, such as e-Flite Carbon-Z, Walkera F210, Blade QX, Yuneec Typhoon, Parkzone Micro Warplane, Spektrum DSM2 plane, JJRC Tarantula x6 or Hubsan X4; you can turn your affordable Devo transmitter into a power house that supports multiple protocols, all you need is the provided Walkera USB transmitter cable.

The Deviation hacking project supports multiple protocols without any modifications to the transmitter:
● Devo 6/7e/8/10/12/F12e WK2401/WK2601/WK2801
● DSM2/DSMX JR, Spektrum, Turnigy
● Nine Eagles J6 Pro (with telemetry module)

Is This Antenna LHCP or RHCP Circular polarization?

The most common question asked when you are serious about flying FPV, “Is This Antenna LHCP or RHCP Circular Polarized?” There are a few ways folks do to tell if a circular polarization antenna is Left Hand Circular Polarization (LHCP) or Right Hand Circular Polarization (RHCP), and a simple way is to just see which direction it points to, by following the copper wire from the bottom –> up.

Why is it important to know? The rule of thumb is to use the same matching direction of antenna for transmitting and receiving. If you don’t match the antennae, the range will be reduced up to 75% than a matched antennae. If one is right hand and the other is left hand, there is a 30 dB drop in gain right away (that’s about 1/1000 of the signal getting through)…

Walkera F210 3D racing drone

Walkera does it again, taking the guesswork out of putting together a 3D racing quadcopter drone. F210 3D is a quadcopter with an optimized F3 flight controller paired with reversible electronic speed controller (ESC), allowing you to reverse the motor at mid point to fly upside down in a 3D manner. At flight mode 0 (FMOD=0 factory default) normal flight takes it toll 2D, flip the switch to FMOD=1, take-off in 3D mode, motor brakes and reverses at mid-point.

F210 3D is upgraded with faster receiver response time, stronger frame, and superior low lux Sony HD camera. Pre-installed with a 5.8 gHz video transmitter and On Screen Display (OSD) to assist pilot in flying and replaying every favorite scene of a flight…

Tarot TL300L OSD

TAROT OSD mini TL300L perfect for 250/300 quadcopter size, allows you to configure directly on your monitor/goggle. It is intended for a racing quad, but can be used on any FPV models. it uses barometer to determine the height and and GPS module for position.


OSD video overlay system has the following features: VTx Voltage, Eng Voltage, Flight Time, Flight Speed, Flight Height (altitude), Home Direction, Home Distance, Total Voyage (duration), Lifting Speed (vertical), Longtitude Latitude (GPS), Satellite Number (Count), Azimuth (location of the plane in the sky from the perspective of the base station). HOME OK is set when 6 satellites count are met…

Understanding propellers directions on multicopters

If you find your multi-copter flipping on take-off or just don’t seem to take off, the first thing to check is your propellers or motors. If your propellers are spinning on the wrong direction, the thrust might just be pushing your copter down instead of lifting it up. If you have the propellers in the same orientation next to each other, it may just topple your copter. Propeller are usually marked with the spin direction and they should match the diagram illustrated below…