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81
Electronics / Need help selecting an RC transmitter
« Last post by pterrus on June 19, 2014, 08:56:36 PM »
So I recently acquired this thing for cheap and the plan is to mount an arm kit or something to it and make it into an RC robot.  What I need is a transmitter that has at least 4 channels (2 for drive/steering and at least 2 for the arm servos).

The problem is I'm a total RC noob and have no idea what to buy.  I gather the crystal on my base is 27.145 MHz.  I've looked at stuff like the FlySky FS-T6 but it's unclear to me that this will do what I want.  When it says 2.4 GHz, is that the crystal frequency or something else?  Should I not be looking at digital transmitters?  Am I even asking the right questions?  Googling isn't getting me anywhere, so any recommendations/clarification would be helpful!
82
Mechanics and Construction / [advertisement] New Channel Connector Plate
« Last post by ServoCity on June 19, 2014, 12:55:43 PM »
These plates make it easy to create a strong joining point between our channel pieces!
$3.99 / 2 pack


http://www.servocity.com/html/channe...l#.U6Mrz_ldV7s

We recommend using 6-32 socket head machine screws with this plate (sold separately)



To see additional ways to attach channel watch
https://www.youtube.com/watch?v=UjJ8yy6-kBM&list=UUfOty7yWBfSXfAPAq2AI_DQ
83
Electronics / Re: Need help- 24vdc motor driver
« Last post by jkerns on June 19, 2014, 07:13:48 AM »
It appears from the picture that the input to your motor driver is a PWM from 0 to 98% duty cycle. (on 0% to 98% of the time)

The "Standard" output from the typical RC system is a pulse modulated system that does not provide the above type of duty cycle. (don't recall the details off the top of my head, google it.)

So, unless you can make your radio output a duty cycle instead of the standard servo pulse signal, you will need something to translate from RC style signals to a duty cycle.
84
Software / Re: Making a robot that solve a rubik's cube.
« Last post by Mehal on June 18, 2014, 09:40:44 PM »
Well ,I couldn't get any proper help from the internet, so I decided to try it on my own. I have made a simple program in C which asks me to input the colors on each facelet and then in output it shows where does each piece belong and how it needs to be oriented. But how to find the neccessary algorithm using this data?
85
Electronics / Need help- 24vdc motor driver
« Last post by mr_rendell on June 18, 2014, 06:59:06 PM »
Hello,
First of all thanks for allowing me join this group.
I need help figuring out electronics on my lawnbot,
I am using:
2ea wheelchair motors
2ea 12vdc 35ah batteries
Lawn mower (of course)
Super e t4 fhss digital proportional radio system (4ch)
And... 2 ea (china made) ebay
DC 15-24V 40A Brush Motor Driver Module Drive Board 80A Max
(Was gonna get sabertooth 2x25) but a bit pricy

Now..
I am not sure if I need arduino to control my motor driver board or use it just like sabertooth
When I try to plug it with my batt and receiver, I was only getting 9vdc on the motor poles.
Has anyone use this motor driver?
Thanks in advnce!
86
Software / Re: Problems uploading to Axon II using McUber
« Last post by Webbot on June 17, 2014, 07:46:29 PM »
Ok - can't vouch for the board - but maybe Admin (the manufacturer) can.

Could try Webbot Studio  http://webbot.org.uk/iPoint/50.page at least I can help with the log output from that.


 
87
Software / Re: Problems uploading to Axon II using McUber
« Last post by Hero I on June 16, 2014, 04:45:45 PM »
I even went on Yeta Corp's website last week and sent them an Email asking them about the problems I'm having with McUber, but haven't heard from them yet.

http://www.yetacorp.com/products/mcuber/
88
Software / Re: Problems uploading to Axon II using McUber
« Last post by Hero I on June 16, 2014, 03:20:21 PM »
If you also have an AVR-ISP MKII programmer plugged into the SPI port then remove it - it resets the chip about a second after power on and clobbers the download from McUber.

The only thing plugged into my Axon II is the USB connection and battery power which is "off" until after I press the "Program" button in MCuber.

1. Have you ever managed to xfer a hex file to the board using McUber?

No.

2. If you have ever used a hardware programmer (like the AVR-ISP) then you will have zapped the bootloader on the board and so you will need to use the hardware programmer to re-install the bootloader onto the board.

I never used a hardware programmer on my "new" Axon II.

3. Did you get the Axon from new (in which case it should have the bootloader subject to point 2 above). If you got it 'used' then the previous owner may also have wiped the bootloader.

I bought it new.

Is the hex you are trying t upload from your own project (ie your code) or is it one of you've downloaded (like centering a servo)?

It is my own hex file. The C source was generated by Project Designer and compiled and linked in Atmel Studio 6.1

89
Robot Videos / Girl builds Justin Bieber Robot
« Last post by emmaprice on June 16, 2014, 12:08:59 PM »
Hahaha. This is hilarious

Bieber Bot (vlog #86)


90
Mechanics and Construction / I look for a term for what I'm looking for
« Last post by ManMan88 on June 16, 2014, 07:25:45 AM »
Hi all,

This is kind of a NOOB question.
I'm looking for a 3 axes serial rotary actuator (a complete system) to put at the end of my robot.
Something similar to the last 3 axes in the Puma robot.
Is there a known term or phrase for such a thing?

Thanks a lot,
Ron
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