• Prague
  • Czech Republic

Kolin's Friends

  • Evan-cs
  • BingRu Guo
  • Mike Eisen
  • Semyš
  • MV Reddy
  • SlimTom
  • Stefan Gofferje
  • Ujjwal John
  • Gisela & Joe Noci
  • Itay Guy
  • Madhu Nuggehalli
  • Greg Fletcher
  • Paul Marsh

kolin's Groups

kolin's Discussions

Upgrading from 2.40 to latest 2.73, possible inconveniences?

Started this discussion. Last reply by RocketMan Jun 2, 2013. 1 Reply

Hi,I have nice setup of APM1 (2560) with Arduplane 2.40 in large flying wing. Plane is grounded for about a  year now and I want to fly it again. It worked well, everything was set up well. I am…Continue

How to force Arduplane to run without baro sensor

Started Jun 8, 2012 0 Replies

HiHow do I disable baro sensor in code? Where do I have to touch in code? Probably just comment some lines. Code of APM si too much for me.What is pressure sensor used for on Arduplane? I hope it is…Continue

Tags: baro, without, arduplane

What CAD software are you using and why?

Started this discussion. Last reply by Andrew Adams May 7, 2012. 2 Replies

Simply:What CAD software are you using and why?Me:For 2DI use Solid Egde 2D Drafting  - free versionIt's "free" (you need to register). I tried many of CAD programs, both free and full versions…Continue

APM1.4 2560 failed I2C

Started this discussion. Last reply by Jake Stew Apr 5, 2012. 3 Replies

Hi,Just before maiden of my Funjet APM stopped working. After few hours of debugging I figured out I2C devices are not working, preventing APM to initialise. After all I wrote simple programvoid…Continue

Tags: static, discharge, ESD, I2C


kolin's Page

Latest Activity

kolin replied to turdsurfer's discussion Why no physically separate multicopter controllers and autopilots yet?
"It is nothing new. Mikrokopter was one of the first FC having some navigation. Navigation code is run on ARM while basic flight contronl is running on AVR. They comunicate via bus, so navigational board uses sensors from basic FC. It has it's…"
Mar 9
kolin commented on Oscar's blog post MinimOSD Cooling Kit / Enclosure for V1.1 and 1.2
"Atmega don't need heatsink. Maxims's IC could use one, but it is already cooled to PCB by thermal pad on underside. Old version of minimosd with tiny linear 5V regulator needs cooling, or better replace by regulator by bigger 75M05. I…"
Jan 11
kolin commented on benbojangles's blog post Lightweight (8g) 2.4ghz fpv camera
"Probably will only encode MJPEG, not h.264 or at least MPEG4. CMOS sensor will be really slow as is in most seccurity IP cameras. Useless, sorry"
Oct 6, 2014
kolin commented on Tom Sozzi's photo


"Mad Max airplane :)"
Aug 19, 2014
kolin commented on Egor_FPV3DCam's blog post 3D FPV camera The BlackBird
"Hi Daniel, Do you have experience with using two independent cameras, two video transmitters, two receivers and finally hacked video goggles? Resolution would be greater, off the shelf components and even added redundancy. I have ever wanted to try…"
Jul 5, 2014
kolin commented on Markus Järve's blog post X4 first maiden
"Gret design! Could you please tell us about other autopilots you worked with, like micropilot? It is very expensive and I wonder if well tuned pixhawk can do the same."
Jun 22, 2014
kolin replied to Víctor Mayoral's discussion ESC in one chip
"IC you mentioned look like common fasat optocoupler http://www.avagotech.com/pages/en/optocouplers_plastic/plastic_intelligent_power_module_interface_optocoupler/hcpl-m452/ Actual ESC mosfets might be on other side of board."
May 18, 2014
kolin commented on CrashingDutchman's blog post Turnigy T1000FC Fixed-wing Auto Pilot System With GPS and Return To Home
"I do not see motor output. Does it mean I have to set up failsafe with about 60% of motor on? Wow, it is very safe when you turn off radio with plane powered up on the ground :-P"
Jan 6, 2014
kolin commented on Joshua Johnson's blog post CADDrones.com - Beta Now Open - Open Source Community/Database
"I am registered, how and where I post CAD drawing I like to share?"
Dec 28, 2013
BingRu Guo commented on kolin's blog post RC system on 868MHz based on OpenLRS
"I want to do 1W 433MHZ TX .I can buy RFM23BP in China"
Nov 21, 2013
BingRu Guo commented on kolin's blog post RC system on 868MHz based on OpenLRS
"I want to know where I can down the HEX for openlrs? "
Nov 21, 2013
kolin commented on Armen Poghosov's blog post Gas+electric hybrid multi-copters ...
"How about "classic" electric multicopter with added engine/generator with backup battery? Like big diesel-electric trains. Redundancy would be done in power management unit, not mechanics/software. I am sure you considered this, I want to…"
Oct 31, 2013
kolin commented on Gisela & Joe Noci's blog post Video and Datalink Antenna for airborne and ground tracking systems
"Please post drawings for 868Mhz antenna. It would be great for my RC system http://diydrones.com/profiles/blogs/rc-system-on-868mhz-based-on-openlrs"
Oct 25, 2013
MV Reddy commented on kolin's blog post RC system on 868MHz based on OpenLRS
"Since 868MHz is not on any of the PMR channels, what frequency is beacon mode transmitted at?"
Oct 15, 2013
kolin commented on Alan Sanchez's blog post SaceMouse for copter control
"Some guy used this 3D mouse for Mikrokopter years ago. Not a new idea, but definitely great one. http://www.mikrokopter.de/ucwiki/en/Riddim Does this device acts as joystick in OS?"
Oct 8, 2013
kolin commented on kolin's blog post RC system on 868MHz based on OpenLRS
"Hi, sorry there is no BOM. You can generate it from Eagle. All items are meant to be as common as possible."
Sep 30, 2013

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About Me:
Please tell us a bit about your UAV interest
fpv, mikrokopter

Kolin's Blog

RC system on 868MHz based on OpenLRS

Posted on December 23, 2012 at 11:35am 21 Comments


About year back, I found OpenLRS. When looked on schematics I discovered it's really simple. I checked local parts supplier and found out 433Mhz and 868Mhz RFM22B modules to be about 9$ Then calculated that price would be half if I do it myself. So I ordered 433Mhz (868 was not in…


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