Quote from: shirsa2001 on June 25, 2020, 02:21:25 PM
Even in local hardware shop. Once I started looking for 3mm plywood. The first question they asked "Ye kisme lagega? (where will you use it?)" By mistake I told "aeromodelling" first they could not understand (which is perfectly ok everybody can not know everything). Then to hide their ignorance they keept mum and showed me the door.

Since then I changed tactics and for push rods, nuts and bolts and plywood .... even foam.... I just say "Beti ke school me craft me lagega? (Its for my daughter for her school's craft class)" and make a very sad face.

It worked...they show me whatever they have and I sometimes find the one that suits most. 
"New" things or the thought of "new" things makes them very nervous.

So true. I have had the same experience. Sad reality is that India is not conducive for DIY people where any material / infrastructure is needed. Only thing that can be done here without hassles is to develop software as this doesn't need anything but a PC. Very difficult to do anything in the hardware space. The blame lies with both the government policies and the mindset of people. Unfortunately not easy to change either

Good to see people trying to do stuff in India. I have fanuc robodrill with we now, so if any cutting is required let me know.

Sahil

Hi Guys,
Since i have some time between projects i have started designing a RC transmitter
https://www.rcchennai.in/designing-rc-transmitter-electronics-in-india/
check it out and let me know your thoughts.
Thanks

Excellent stuff. i am working on something on the same lines.

From scratch build a radio and also firmware for the same. its using following components

STM23F105
NRF24+ module (for cheap) and CC2500 module which will be little expensive
Both have PA+LNA


We are in stage for designing a 3D model for the same. Once its done will put it to test among the community.

Hi Satyagupta,
Awesome, I'm eagerly waiting for your transmitter.
I had pretty bad experience with Fake nRF24L01+ and ESB in production for a different project.
I'm on a quest to build a completely Indian made drone except for motors batteries and props.
Let me know if you need extra pair of hands on your project.

I wanted to start with CC2500 but I couldn't find any reliable resources to link it with stm32 (library I mean).

Also I have worked with Arduino, which is very easy to code. But on my one of my friend's insistence I decided to use arm mcu (stm32) which is totally new for me . Hence wanted to use libraries which are already available for ready to use.

cc2500 libraries are available for c51 in the product page i'm modifying them to use with HAL Stm32. I have been using stm32 for the past few years and they are very easy to program and setup especially with the new STM32CubeIDE

I know, I am new to stm32 started in Feb this year. Will pm u sometime 😃

Quote from: RCChennai on August 14, 2020, 06:36:44 PM
Hi Guys,
Since i have some time between projects i have started designing a RC transmitter
https://www.rcchennai.in/designing-rc-transmitter-electronics-in-india/
check it out and let me know your thoughts.
Thanks

Nice will start working on my ms2k radio encoder soon. More interested in diy multi module and frsky rx for micro rc stuff.

In your radio build after the MCU reads the Analog/Digital data before ppm signal is output, the settings and stuff will happen in phone and then sent to MCU after which ppm signal is constructed?

after the config is sent from the phone it will be written in emulated eeprom of stm32 then the global variables will be updated. Timer interrupt with  priority zero will be used to construct the PPM frame and all analog read and sending data to Bluetooth will occur in sync time in the PPM frame.   

Ok got it, what about in flight setting or changes to trims etc will happen simultaneously without used input

all the trims and channel mixing  will come under profile. Transmitter will have buttons to cycle through profiles and there will be 4 LEDs (binary encoded) up to to 16 profiles can be stored and can be modified on the fly using Bluetooth app 

Hi guys, I finally got the PCBs and i finished assembling i am testing the firmware 





I'm having few issues with the range and i have been instructed by Texas Instruments to use a shunt inductor to improve signal quality

Sorry for the large images

Nice, you have a reflow oven and solder paste via screen printing?. Did you check the RF stage its with in spec?.

Sahil

I hand soldered it with hot air station. I confirmed that the chips are soldered by using my microscope. I have to change the antenna. I don't have enough space to test the full range. If anyone is interested in testing the module I can send them one if they can test the range.

Sent from my SM-G950U using Tapatalk

Quote from: RCChennai on August 28, 2020, 11:29:56 PM
I hand soldered it with hot air station. I confirmed that the chips are soldered by using my microscope. I have to change the antenna. I don't have enough space to test the full range. If anyone is interested in testing the module I can send them one if they can test the range.

Great job on hand soldering   

Excellent work!

Hello Indian RC Pilots,
Filling great to announcing all.
We  are here in the india as a first ever Indian Radio Control Company.
"www.rcairfield.com".
As a manufacturer in RC, we started with airplane with full RTF kit and PNP kits which are totally made in India.
And in response with RC community in India, we are soon manufacturing other RC goods like ESC, Flight controllers, multi channel all in one radios for Indoor/ Outdoor aircrafts and Multirotos.

Nice work.