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iRangeX IR8M: when you clone too much, but that is not a bad thing after all
I love chinesium and admire chinese manufacturers very much for a simple fact: some time ago they stopped just cloning. They started to create new things based on “legit” ones. Just look at iRangeX iRX-IR8M 2.4G 8CH Multi-Protocol Transmitter. Doesn’t this thing looks almost like Team Black Sheep Tango radio transmitter? Well, it is at…
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ESP32, Arduino and 3 hardware serial ports
When working with ESP32 WiFi/Bluetooth MCU under Arduino SDK for ESP32, you will notice that Serial work just fine. But Serial1 and Serial2 do not. ESP32 has 3 hardware serial ports that can be mapped to almost any pin. But, Serial1 and Serial2 will not work. In case of ESP32 this just has to be…
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Crossbow LRS, hardware
Weather outside is bitchy. Period. It rains, then it's windy and then maybe there is some direct sunlight for 15 minutes. No way to fly or test my DIY RC radio link. But, there is some progress after all. My latest changes seems to be working just fine. On a bench link was stable for…
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Crossbow LRS, I was doing this wrong…
Last update on Crossbow LRS DIY RC link I'm currently building was 2 weeks ago. Back then, it did not went well: crashed an airplane beyond field repair. Last weekend I was able to do what I planned, but that did not went well as well. This time from completely different reason… Link was catching…
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How brushless outrunner electric motors are winded
Motor winding adventure continues. In this video I show and tell about: 12 coils (12N) 14 magnets (14P) dLRK winding schema WYE and Delta termination schemas
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Project Dualcopter – worklog #4
More than a year after staring this damn project, I finally decided what goes where. And on top of that, short description how Dualcopters works (or at least should work). There are two counter rotating propellers on top. They are responsible for thrust and YAW control When both props turns faster, dualcopter gains altitude When…
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A proper way of doing read callback receive with Arduino LoRa
Arduino LoRa is a great library that brings LoRa support (SX1276/SX1277/SX1278/SX1279) to Arduino world. I'm using it in my Crossbow LRS project (still not stable enough for flight, work in progress). Until now, the biggest problem with this library I've found is that examples suggests that heavy protocol processing inside interrupt callback is fine. Unfortunately,…
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Video tutorial: 5.8GHz Inverted Vee antenna for FPV
Today another video tutorial. It’s just simpler to show how to make something on video than with text and images. So, without further ado: How to make Inverted Vee antenna for 5.8GHz FPV at home. All that is required is: coax cable (here RG316) SMA/RP-SMA connector copper welding wire caliper soldering station basic tools At…
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Crossbow LRS, range test that did not went well….
Yestarday I wanted to make a first “real” range test of my DIY LRS system. “Real”, because RX was supposed to be on a flying wing, but only as an passenger. Actual control was supposed to be happening via FrSky X8R. Crossbow RX was only to measure RSSI and check for failsafes. It, well, did…