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51
Software / Re: Webbotlib Studio FBoot only works the first time!
« Last post by Hero I on October 08, 2014, 01:57:33 PM »
I'm assuming when you used the bootloader and program that I sent you, you attempted the programming of the Axon II all from a Windows 7 64 bit computer? Is that correct?
52
Software / Re: Webbotlib Studio FBoot only works the first time!
« Last post by Webbot on October 08, 2014, 12:19:59 PM »
Yep - and that's how I have stuff. But for me everything works!!

Given that we are both using the same version of FBoot on the board (written by another supplier - ie not Webbot nor SoR but from a 3rd party), and that a bootloader from the pc end can only upload a flie (ie Webbot and everyone else just use the API) then I'm very confused why it works differently. Since WebbotLib Studio is going through the same comms API as any other bootloader client (fboot command line or McUber) then I am mega confusd.

Perhaps its the same when using other software at the computer end? Or do you get success when using A.N.Other programmer? Or does everything fail?
53
Misc / Re: disabled person needs help with setting up microcontroller
« Last post by jkerns on October 08, 2014, 11:49:28 AM »
Have you considered working with a local Robofest or First Robotics team?
54
Software / Re: Webbotlib Studio FBoot only works the first time!
« Last post by Hero I on October 08, 2014, 09:38:26 AM »
I disconnect my AVR Dragon programmer after programming the bootloader.

When using Webbotlib Studio's FBoot, there is nothing connected to my Axon II except for the USB cable and power source.
55
Software / Re: Webbotlib Studio FBoot only works the first time!
« Last post by Webbot on October 08, 2014, 09:08:39 AM »
Have installed your attached bootloader hex file
Set fuse settings as specified in my setup ie 512W_7E00
I can then program your project hex file, and others, as many times as I want - all successfully - using the FBoot bootloader.

The ONLY way I can get it to fail  is to leave the hardware programmer, AVRISPMKII, attached to the board - as it causes a RESET during programming. Appreciate you are using the Dragon programmer (but I dont have one - so hard to compare).

So am somewhat at a loss why you are seeing something different.

Clutching at straws then you may need to unplug other/all hardware - as I have nothing connected to my AxonII when testing this - as I have no idea what your hex file does. Devices that control RESET or have high power needs (hence may put a large  drain on a non-charged capacitor could cause the bod to reset the board ) are the main suspects.

But for testing it would be best to disconnect all devices. If that works (as it does for me)  then try adding devices back in until it fails.
56
Robot Videos / Re: Automata (new robot movie trailer)
« Last post by shina on October 08, 2014, 12:28:15 AM »
Online Watch AUTOMATA HD Movie >>> http://goo.gl/YOOvv2

57
Software / Re: Webbotlib Studio FBoot only works the first time!
« Last post by Hero I on October 07, 2014, 07:47:17 PM »
Attached you will find the bootloader that I'm using and my program.
58
Misc / disabled person needs help with setting up microcontroller
« Last post by dmehling on October 07, 2014, 04:12:35 PM »
I am a physically disabled person, and I have some simple electronics projects I would like to build in order to help me operate some devices.  For example, I need a way to turn pages on a Kindle.  I was thinking of mounting a servo on either side of the device in order to push the buttons to turn pages.  However, I cannot do this myself, and I don't know anyone who can do it.  Are there companies or individuals that will set up a microcontroller that is interfaced to a servo, or any similar kind of electronics project?
59
Misc / Pololu Robotics Halloween Sale
« Last post by bens on October 07, 2014, 01:59:00 PM »


Hello, SoR!

We are having our first-ever Halloween sale this year, with discounts on an assortment of products you can use to make awesome costumes and extravagant yard displays.  From now until October 22, you can get 10% off hundreds of products, from servos and LEDs to sensors and programmable controllers. Even bigger discounts of up to 30% are available on a few select items. See the sale page for more details and the full list of products.

We would love to hear about anything cool you make with our stuff, so please share it with us! This month, we'll be posting a series of simple Halloween-themed projects of our own to help inspire you.



Happy Halloween!

- Ben
60
Mechanics and Construction / Uni-directional ball screw alternatives.
« Last post by rodrigonramon on October 07, 2014, 12:47:09 PM »
I am trying to find a one way ball screw to use on a machine I am building.

Basically what I would need is a small spring loaded ball screw with a good amount of threads to spin a motor.

Imagine a yankee screwdriver, but instead of focus on force and bi-directional movement,
a focus on spins and uni-directional movement.

I want a recurring movement to spin the ball screw causing the motion to spin a motor to cause a voltage.
Then when the pressure is released from the actuator, the ball screw would slide back up to starting
position and then begin to spin again when the force is reapplied.

I am not technically married to the idea, and any other suggestions to improve on this would be appreciated.
I also considered using a regular ball screw connected to a regular motor and then using a full wave
rectifier to fix the alternating voltage and create a DC voltage.

Ideas? Improvements? Flaws?
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