Author: Paweł
-
Raspberry Pi + MOSFET = High power switch
With all the possibilities, Raspberry Pi requires additional hardware to turn on and off any additional hardware. GPIOs built in power limit is low: 3.3V, 16mA per GPIO, but not more that 50mA total). And while it might be enough to light a small LED, it is not enough for anything else. Forget about motors,…
-
DIY FPV RC Plane with foam board – The RedCruiser Project
Few months ago I’ve wrote about my first handmade Depron airplane. It was cool design. Super simple, with KFm-2 airfoil, durable and easy to fly. But it had few serious flaws: That’s why, I have build a second foamboard airplane. This time with pusher propeller mounted on a tower behind wing. Wing is almost the…
-
PPM signal support for FS-i6 radio
FlySky FS-i6 (or branded Turnigy TGY-i6) is a very decent 6 channel entry level RC radio system. But support for PPM (CPPM) standard is somehow not clear. I have no idea why manufacturer keeps PPM support data so well hidden. Anyway, here it is: how can I enable PPM on i6 radio system? PPM signal…
-
PWM, PPM, and Serial RX explained
When speaking about radio systems for remote controlled models, multirotor, airplanes, gliders, there are some shortcuts that might be unknown for beginners. Those are: PWM, PPM, Serial RX, S.Bus. Today I will explain basic concepts behind them, and when they are used. PWM PWM, as Pulse Width Modulation, is something a standard for controlling different…
-
5.8GHz FPV channel frequency table
For 5.8GHz FPV systems, there are 5 main bands divided into 8 channels each. That gives 40 channels free to use. So, in theory, 40 pilots should be able to fly FPV at the same time. Unfortunately, this is not true. First of all, there are transmitters, and there are transmitters. Better, properly tuned, will…
-
Flash firmare to S.Port FrSky receivers with X9D Taranis
FrSky X9D is an excellent radio. There is a variety of receivers that can work with it. And each of receivers is a small computer itself. With its own firmware that can be changed. Why? For example to enable CPPM mode, or allow receiver to bind with EU or non-EU Taranis (I will write on both…
-
Quick Review: EMAX GT2218/08 1100KV motors
Since I was lacking some power in my Reptile 500 quadcopter, I was considering switching my Turnigy MT2213 935KV motors to something more powerful. Last previous weekend kind of forced me to make that switch: I destroyed one motor while trying to replace bearings. Being forced with lack of motors I’ve decided to stay with…
-
How to add external compass to Flip32
In my last post I’ve showed how to disable internal MHC5883L compass on Flip32+ (10DOF) flight controller board. Now it’s time to fix what we’ve broken last time, and connect external MHC5883L compass with I2C bus. In my case I used very popular setup: u-blox NEO-6M GPS module with integrated MHC5883L compass. So you have…
-
How to disable compass on Flip32+
Build in HMC5883L compass/magnetometer is very nice feature of Flip32+ flight controller. Too bad it’s not always working like expected and there is a time, when one have to replace it by external device, positioned as far away from power cables as possible. I’ve encountered that specific problem two weeks ago when I’ve discovered the…