Tag Archives: radio control

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…

XK A110 Predator MQ-9 EPP Glider 565mm

XK is one of my all time favorite manufacturer that makes ready to fly (RTF) self-stabilized drones.  This XK A110 is modeled after the Predator MQ-9 drone using 3 channels.  XK A110 Predator MQ-9 is very light and uses differential trust, just like a quadcopter, to power the turns instead of using a rudder. Two small propellers, one on each wing. A little disappointing, the back larger propeller is just a dummy prop that only adds some drag.

The pusher propellers are dual-engine powered and rotates in opposite directions to cancel each other out of the counter-torque; that keeps it more stable and in path. Comes built-in a 6-axis gyroscope flight auto-stabilization system with dual rates, allowing me to perform some aerobatics such as loops…

Motive-RC R8SB Telemetry Receiver on Taranis X-Lite

I still fly lots of planes the old school way, without any flight controllers, so this Motive RC R8SB all-in-one receiver even though a D8, it allows me to use my Taranis radio transmitter and most of the features.  Add a voltage sensor and I am all set.  The receiver comes with various model type SBUS, physical channel PWM outputs, PPM and RSSI.  The RSSI warns me about the signal strength before I fly too far out.   Here is a video on how I add a RSSI bar to my X-Lite screen using the Motive-RC R8SB.

The R8SB is like the FrSky V8R7-II receiver but with telemetry functions.  It bound instantly and lights up like a green lantern. There are more pins than a usual receiver, but they are nicely color coded to help me determine signal, power and ground.  The upper set of pins are your 8 channels or SBUS/PPM.  The lower set of pins are RSSI, two analog telemetry ports (A1&A2), A1 for internal receiver battery voltage sensor, A2 for external battery voltage sensor (0~30V, 1~6S) and one digital data-stream port (Rx, Tx)…

FrSky Taranis X-LITE Review Spring Unloaded

Frsky taranis x-lite

Introducing the FrSky Taranis X-LITE, the ultimate gaming radio transmitter. Made to match the ergonomic modern design of a gaming remote control, this radio transmitter has all the capabilities of a traditional radio and more.

One advantage of this FrSky radio is I can switch out to a R9M 900MHz frequency system for long range, low latency, going as far as 10 km.

First impression is good, it is more refine than anticipated.  The speaker sound is so much more superior than the Taranis X9D .  Equipped with the latest M12 Lite hall sensor gimbals.  Hall sensor gimbals are more precise and durable than traditional gimbals using potentiometers.  The switches may feel a little too small, but for casual flying (not competitive racing), this radio does just fine…

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.

Specification:
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)

Volantex Ranger 757-4 Review

TODAY I took a look at the Volantax Ranger 757-4 that we purchased online for just over a $100. The 757-4 is a scale down version of the popular 2m Ranger Ex 757-3 FPV Drone plane. It is resized to 1.4m 1380mm, just small enough to fit into a standard size car trunk/boot without taking it apart.

One of the more interesting feature of the plane is that it is designed for GoPro or FPV cameras.. it comes tail heavy, so you can install multiple fpv cameras and large batteries. A weight is even included in the event you are not ready to fly with a camera. We had to fly it with a 3S 5000 mAh LiPo battery without a GoPro weight on the front, to get the correct center of gravity (CG). It is quick, easy to assemble, no glue is required.

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)…