Melih Karakelle's Blog (46)

Weird story about Google/Nest and Hardware bricking

"Google/Nest’s decision raises an interesting question. When software and hardware are intertwined, does a warranty mean you stop supporting the hardware or does it mean that the manufacturer can intentionally disable it without consequence? Tony Fadell seems to believe the latter. Tony believes he has the right to reach into your home and pull the plug on your Nest products.

On May 15th, my house will stop…


Added by Melih Karakelle on April 9, 2016 at 12:21am — 11 Comments

New DroneThermal - Smallest Thermal Camera for Drones

Hi Everyone,

After 5 months of design and test process, new DroneThermal v022016 thermal camera boards are ready to announce. 

This is probably the smallest analog (PAL/NTSC) thermal camera in the world. 

Dimensions : 20mm x 20mm x 15mm (included Lepton 25 degrees core)

Weight: 3 grams…


Added by Melih Karakelle on February 11, 2016 at 6:00am — 8 Comments

1 hours 43 minutes Flight with 2S NCR18650B Batteries

Hi Everyone

Last weekend I've tested Panasonic NCR18650B batteries on my maiden PolyClub EPP airplane. 

I was expecting ~40 minutes flight but I landed after 103 minutes 24 seconds! (1h43m24s)

This batteries are definitely working!

Only disadvantage of the batteries are low discharge rate. It is max. 2C.

So, discharge current should be less than 7A…


Added by Melih Karakelle on July 3, 2015 at 8:51am — 8 Comments

FLIR Lepton vs Apple Facetime HD Camera

Hi Everyone,

Yesterday, I shot this video with my MacBook Air and DroneThermal camera.

The results are promising. Thermal image resolution is only 80x60 pixel but sensitivity is not bad.

BTW, We designed an…


Added by Melih Karakelle on April 15, 2015 at 5:45am — 4 Comments

25° Thermal Camera Cores for Drones

Hi Everyone,

Good news for small drones, New FLIR Lepton 25° camera cores just arrived. 

If you have read this post before , I have tested our new camera design with 50° version of Lepton and the range was shorter than 50 meters for human body because of wide…


Added by Melih Karakelle on March 25, 2015 at 12:32pm — 10 Comments

DroneThermal Analog MAV Cameras, Almost Ready

Hi Everyone,

I'm happy to present the final prototype of DroneThermal micro size analog (PAL/NTSC) thermal camera. 

The project started 3 months ago and we have published some samples on …


Added by Melih Karakelle on March 16, 2015 at 5:30am — 19 Comments

iCELL Battery Monitor over Bluetooth Low Energy

Hi Everyone,

I'm working on Bluetooth Low Energy (BLE, Bluetooth Smart or Bluetooth 4.0)  technology since summer 2013 and after few hundred hours code work my first BLE product(iCELL) ready to show and I'm happy to share here with the community.

May be you know, Some Android devices and all iPhones(since 4S) including this low power…


Added by Melih Karakelle on February 20, 2014 at 9:50am — 19 Comments

How About Open Source?

Yesterday HK released a video about their new 433Mhz LRS modules.

And i shocked. Because it is unauthorized copy of my OpenLRS !

OpenLRS is an Opensource RC and i'm the developer of that system.

Stop the video on 1:08 and check the receiver.…


Added by Melih Karakelle on November 28, 2012 at 12:00pm — 39 Comments

OpenBee Telemetry Traffic Test

Hi everyone, 

Another blog post about OpenBee :)

Everyone asking about telemetry speed but i didnt answer this questions because of nature of RF telemetry.

RF telemetry speed depends more than one thing. I just take this video for showing unidirectional communication limits. 

The limit depends FSK modulation frequency and RF bandwidth. We can…


Added by Melih Karakelle on October 17, 2012 at 5:55am — 5 Comments

UHF Spectrum Analyzer with OpenBee

Hi Guys,

OpenBee modules ready and in stocks today. I just tested Dennis Frie's spectrum analyzer firmware and software over OpenBee. It is working perfect!. The original code a part of OpenLRS RC Receivers and OpenBee using same RF module and pinouts with OpenLRS project, this is why the code working without any problem. :)

In this…


Added by Melih Karakelle on October 17, 2012 at 4:33am — 7 Comments

OpenBee Modules Ready!!!

Hi Guys,

Today OpenBee boards arrived from PCB factory and i just tested them and working fine :)

It is including Arduino 16Mhz ProMini bootloader and you can upload the code directly over Arduino with USB to Xbee Adapters. No need an external FTDI board or something.…


Added by Melih Karakelle on October 10, 2012 at 7:22am — 13 Comments

OpenBee: an OpenSource Telemetry Module with Xbee footprint

Hi Guys,

As you know, we are working on OpenLRS project since few years and It is an Open Source RC control system with telemetry, I2C and others. Few days before i designed this new boards. It is based on OpenLRS system but there is no 3.3v regulator, PPM or Servo outputs. It is an open Source Telemetry Module with XBee footprint.   And today prototype boards arrived…


Added by Melih Karakelle on September 18, 2012 at 8:08am — 16 Comments

RC LANC Controller for Sony / Canon / Panasonic Video Cameras

Hi Everyone,

I'm working over some LANC controllers since few months. LANC is the camera control protocol by Sony and most of  Sony, Canon and Panasonic cameras using this protocol to control the camera features by a cable remote. 

I'm designing LANC RF links and other LANC products for video production market.

My new product is a RC LANC controller over servo lines and it is currently in production. 

It is supporting Zoom(In-Out) and…


Added by Melih Karakelle on August 3, 2012 at 6:30am — 9 Comments

Micro Quadrocopter vs Airsoft Guns

Hi Everyone

Today is Friday and after dispatching all orders finally we are idle.

My MQ-202 MicroQuad was on the desk and airsoft guns were on sight.

Please watch all video we have a surprise in the end ;)

Have a nice weekend

Melih &…


Added by Melih Karakelle on April 20, 2012 at 9:02am — 17 Comments

MQ-200 microquad setup and first flight


Hi Everyone,

Maybe you remember, last week my 200mm size quadrocopter (MQ-200) was lifted a GoPro.

After outdoor flight under 15-20km wind conditions without any problem,  i designed MQ-202.

It is same size microquadro but including landing gears and more rigid than MQ-200.

MQ-202 flying with…


Added by Melih Karakelle on March 29, 2012 at 7:19am — 1 Comment

Open Source I2C GPS - Navigatron

Image Image

Hi Everyone,

If you are developing some GPS based applications maybe you know, GPS data protocol is serial and %90 of data is just garbage. You have to listen it every time, data parsing a headache and impossible to making other time critical applications in same time.

I'm glad to announce the Navigatron - I2C GPS solution :)

Navigatron is an Arduino based board with GPS and backup battery. It is…


Added by Melih Karakelle on March 24, 2012 at 1:30am — 6 Comments

Smallest Quadrocopter with GoPro

Hi Guys,

The title is a little bit ambitious but i guess no one tried to lift a GoPro with a 140gr Micro Quadrocopter before :D

The throttle was %80 when flying with half drained 2S LiPO battery, this is why it is a little bit aggressive.

This is my micro quadro setup…


Added by Melih Karakelle on March 22, 2012 at 3:00am — 26 Comments

Most Simple Quadro - OpenLRS Rx Multi's first flight

Hi Guys,

My new OpenLRS Rx Multi boards arrived yesterday.

It is most simple quadro system, because controller firmware working into the RC receiver's processor :)

No need to any wiring for sensors or controllers, just plug your ESCs and fly.


Circuit %100 compatible with our other …


Added by Melih Karakelle on February 17, 2012 at 7:04am — 7 Comments

Most Simple Quadro Setup; OpenLRS Rx + Gyro = Quadro

Hi Everyone,

Maybe you remember, I released OpenLRS Opensource RC radio system in this summer and promised "you can use our receivers as multicopter controller" 

I'm glad to share our new code implementation for MultiWii. 

We added OpenLRS tab into MultiWii 1.9 firmware and replaced 10-15…


Added by Melih Karakelle on January 6, 2012 at 4:41am — 5 Comments

OpenLRS firmware1.10 with Transparent Serial Bridge

Hi Everyone,


Maybe you know, i'm working on Open Source RC (OpenLRS) project since 1-2 years and we released it in this summer.

Today I just finished the firmware v1.10 with transparent serial bridge!

This mean, you can talk with autopilot or other telemetry modules without any extra telemetry device. Your OpenLRS Rx and…


Added by Melih Karakelle on October 4, 2011 at 5:06am — 13 Comments

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