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« Reply #25 on: July 01, 2020, 12:57:13 PM »
sansjunk
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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.  Giggle Giggle
"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 Sad
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« Reply #26 on: July 25, 2020, 01:28:07 PM »
sahilkit
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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
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« Reply #27 on: August 14, 2020, 06:36:44 PM »
RCChennai
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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 Smiley
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« Reply #28 on: August 14, 2020, 07:32:09 PM »
satyagupta
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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.
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« Reply #29 on: August 14, 2020, 08:28:39 PM »
RCChennai
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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.
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« Reply #30 on: August 14, 2020, 08:39:44 PM »
satyagupta
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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.
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« Reply #31 on: August 14, 2020, 08:48:36 PM »
RCChennai
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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
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« Reply #32 on: August 14, 2020, 08:57:00 PM »
satyagupta
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I know, I am new to stm32 started in Feb this year. Will pm u sometime 😃
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« Reply #33 on: August 16, 2020, 09:36:55 PM »
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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 Smiley

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?
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« Reply #34 on: August 19, 2020, 03:12:26 PM »
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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.   
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« Reply #35 on: August 19, 2020, 03:41:23 PM »
sahilkit
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Ok got it, what about in flight setting or changes to trims etc will happen simultaneously without used input
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« Reply #36 on: August 19, 2020, 07:50:08 PM »
RCChennai
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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 
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« Reply #37 on: August 28, 2020, 05:55:44 PM »
RCChennai
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Hi guys, I finally got the PCBs and i finished assembling i am testing the firmware 
https://rcchennai.in/imgs/p0.jpg
Made in India Radio Controller (Tx Rx) for RC Planes

https://rcchennai.in/imgs/p1.jpg
Made in India Radio Controller (Tx Rx) for RC Planes

https://rcchennai.in/imgs/p2.jpg
Made in India Radio Controller (Tx Rx) for RC Planes

https://rcchennai.in/imgs/p3.jpg
Made in India Radio Controller (Tx Rx) for RC Planes


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 Smiley

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« Reply #38 on: August 28, 2020, 05:56:20 PM »
RCChennai
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Sorry for the large images
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« Reply #39 on: August 28, 2020, 10:23:48 PM »
sahilkit
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Nice, you have a reflow oven and solder paste via screen printing?. Did you check the RF stage its with in spec?.

Sahil
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« Reply #40 on: August 28, 2020, 11:29:56 PM »
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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
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« Reply #41 on: August 29, 2020, 09:45:43 AM »
sahilkit
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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  Smiley  Salute
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« Reply #42 on: August 30, 2020, 10:38:57 AM »
satyagupta
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Excellent work!
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« Reply #43 on: September 13, 2021, 03:39:34 PM »
RCAirField
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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.
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« Reply #44 on: September 13, 2021, 08:11:11 PM »
sahilkit
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Nice work.
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« Reply #45 on: September 21, 2021, 02:57:41 PM »
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 Hats Off
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