DIY Radio - India's open forum for RC flying, aeromodelling, cars and hobby stores

« Reply #25 on: August 30, 2010, 07:43:42 PM »

udawatabhimanyu4

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Re: DIY Radio

Quote from: izmile on August 30, 2010, 05:15:48 PM

Also have a look at http://home.nordnet.fr/~fthobois/anglais/engl-index.htm (100% scratch built TX and RX)

This link has been posted by someone previously in this forum

Thanks Ismail Bhai. The site is a bit old but is a good resource though.


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« Reply #26 on: September 02, 2010, 01:19:14 AM »

udawatabhimanyu4

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Re: DIY Radio

Quote from: udawatabhimanyu4 on August 27, 2010, 02:22:14 PM

@Vinay: Thats a nice comparison. I myself am a football player

If the budget permits, i will buy the 1 mile module.

@saju: I am not that good at PPM circuitry. But will look at Sai
what he has to offer. Any info on PPM (basics) would be welcomed.
About the joystick, i am already prepared to make it. It will be using
tilt accelerometers (and hopefully gyro) from analog devices^TM
So that the control would be like real world.

@dileep: The link is very nice with lots of pics. I think this is what
saju has used to make his convertible 2.4 Ghz Assan Radio. (no offence!)

Its PWM; not ppm....


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« Reply #27 on: September 06, 2010, 05:19:16 AM »

anwar

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Re: DIY Radio

People are using XBees often instead of regular RC stuff, it seems.

http://diydrones.com/forum/topics/quadrotor-xbee-replacing-rc


« Last Edit: September 07, 2010, 09:58:37 AM by anwar »	Logged

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« Reply #28 on: September 06, 2010, 08:53:46 PM »

udawatabhimanyu4

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Re: DIY Radio

Thanks Anwar...
We are working on the theory of interfacing of the xBee
modules with Arduino and the joystick. Hope to find a solution
soon. I will post our progress; if we make any


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« Reply #29 on: September 07, 2010, 11:02:12 AM »

vksingh

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Re: DIY Radio

For Joy Stick
http://www.arduino.cc/en/Tutorial/JoyStick

For Xbee
http://www.arduino.cc/playground/Shields/Xbee01


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« Reply #30 on: October 31, 2010, 11:15:24 PM »

udawatabhimanyu4

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Re: DIY Radio

Hi all,
After two months of intense research on the internet, we have decided to purchase the following components from Sparkfun Electronics:

Serial No.
1
2
3
4
5
6
7
8
9
10
11
11
12
13
13
14
15
16
17
Total

Shipping

Products
XBee-PRO 802.15.4 module w/ wire antenna (Series 1)
XBee-PRO 802.15.4 module w/ RPSMA connector (Series 1)
2.4 GHz Antenna
Arduino Uno
Arduino Fio
XBee Explorer USB
Breakout Board for XBee Module
2mm 10pin XBee Socket
Thumb Joystick
Breakout Board for Thumb Joystick
Micro Maestro 6-channel USB Servo Controller
Serial Servo Controller
TLC 5940 - PWM Driver
Triple Axis Accelerometer Breakout - ADXL335
Triple Axis Accelerometer Breakout - MMA7361
Gyro Breakout Board - LPR530AL Dual 300°/s
AVR 28 Pin 20MHz 32K 6A/D - ATMega328
ATmega328 with Arduino Bootloader
Polymer Lithium Ion Battery - 900mAh

Unit Price
Rs. 1984.00
Rs. 2108.00
Rs. 325.00
Rs. 1353.00
Rs. 1152.11
Rs. 1152.11
Rs. 136.22
Rs. 46.18
Rs. 182.40
Rs. 90.04
Rs. 921.23
Rs. 828.87
Rs. 274.75
Rs. 1152.11
Rs. 921.23
Rs. 1383.00
Rs. 198.56
Rs. 253.97
Rs. 413.28
Rs. 15,000

Rs. 4,000

Cannot decide between S. No. 11 and 13. Is the Polulu's Micro Maestro really useful for RC Servo control?
Any suggestions are welcomed. If you feel like adding or removing any item, please comment...


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« Reply #31 on: April 06, 2011, 10:37:02 PM »

udawatabhimanyu4

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Re: DIY Radio

Hi all,
We received the items from Sparkfun and xBee modules from Bangalore.
Started to tinker with the Arduino!
In between, we attended a workshop conducted by Aerotrix at BITS, Pilani.
It was a good experience on building our first aircraft model with all the theory
and formulae behind it.
Will post the work regularly from now on.


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« Reply #32 on: February 17, 2012, 08:16:18 PM »

udawatabhimanyu4

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Re: DIY Radio

Hey everyone
Find the pics attached below and let us know what do you think:
A working DIY Radio.
Tested: range on ground - 250 metres.

Re: DIY Radio rc radio.jpg (61.04 KB, 800x600 - viewed 1127 times.) This post has 2 more images(s)/attachment(s). Please login or register to view them.
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« Reply #33 on: February 17, 2012, 09:06:59 PM »

Swapnil

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Re: DIY Radio

Wow, looks good! Clap

Are you planning to use it with an airplane or a surface vehicle?


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« Reply #34 on: February 17, 2012, 09:13:15 PM »

udawatabhimanyu4

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Re: DIY Radio

Thanks.
Absolutely an airplane.
You can see a bldc in the pics without the prop.


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« Reply #35 on: February 17, 2012, 09:22:59 PM »

Swapnil

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Re: DIY Radio

Oh, right. The centered joysticks had me confused! Does the throttle stick maintain its position or does it have a 'centering' spring?
How many channels does it have and how much did it cost? Sounds like a good project. I'd like to suggest it to some of my juniors.


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« Reply #36 on: February 17, 2012, 09:41:51 PM »

udawatabhimanyu4

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Re: DIY Radio

The joystick is a spring-loaded one meaning it comes
to the centre after released. Its coded to be Zero Throttle in the centre.

The datasheet says 12 channels. But, i guess, if you are efficient
in coding you can squeeze in a bit more.

Cost - The radio or the full setup?
xBee Pro Radio Tx-Rx is about 4.5k total with antenna.


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