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Software / Re: Webbotlib Studio FBoot only works the first time!
« Last post by Hero I on October 09, 2014, 08:11:33 PM »
I'm running Webbotlib Studio via WebbotLibStudio.jnlp

The version is 1-13-1.

See attached for the Webbotlib Studio help about info.

And yes, I would love to try your WLSBOOT program.

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Electronics / Re: Help with converting flow meter output signal to power a relay.
« Last post by 1967marti on October 09, 2014, 04:52:03 PM »
*side note*  To help grease the wheels: We have a laser cutter on-site; as a "thank you" for your help I could do some custom acrylic parts.

Thanks!

- matt
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Electronics / Help with converting flow meter output signal to power a relay.
« Last post by 1967marti on October 09, 2014, 03:08:18 PM »
Hi all!

I'm trying to find a cheap/easy way to convert the pulsed VDC output from a common liquid cooled PC flow meter to power a PCB mounted relay.

The board I'm working on will have a 12VDC supply to it; so the relay that needs to be powered can use any voltage below that (if it matters). The flow meters that I'm hoping to use are the cheap ones used for water cooling in home PCs. The meters have an input of 5-24VDC and an enclosed hall-effect sensor that sends out a signal that is pulsed by how fast the internal fan is spinning.
The use of this is for a coolant stream for a CNC mill. I need to have a relay triggered if the flow is stopped. The pressure of the coolant is too low to use a screw-on pressure switch, so a flow meter is my only option. Since the  flow of coolant can be throttled up or down depending on the material being cut the relay should only be triggered if it detects no pulses coming from the flow meter, AKA the speed of the pulses doesn't matter just that they occur at least 2 or 3 times every second or so. 

I figure this is something that can be done pretty easily with a simple 555 timer circuit? At least I hope so.... Any ideas on this or a circuit diagram I can use?   :-\

Thanks!

- matt
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Note to self --- after more digging I think the MCP23017 chip will meet my needs.

However, I would still appreciate any on usable chips.

Cheers


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Software / Re: Webbotlib Studio FBoot only works the first time!
« Last post by Webbot on October 09, 2014, 11:19:52 AM »
What version of WebbotLib Studio are using? Latest is 1-13-1.

How are you downloading/running it?
1. via the WebbotLib Downloader
2. via the JNLP/JavaWebStart file
3. some other way

[edit to add]
I've been through your steps and, once again, all works for me.

I'm just wondering if, for some reason, your board is rebooting once the bootloader get underway. FBoot isn't good at handling this - and that's why leaving an AvrISP hardware programmer connected fails as the programmer resets the cpu after a short while.

In your case I'm wondering if you are getting bad contact bounce from your power switch causing a quick on-off-on.  Clutching at straws!

If you're up for it - I've also written my own boot loader called WLSBOOT (you may have seen it in the drop down) which detects these sorts of things and is more resilient. If you're up for it then let me know and I'll send you a copy to try.

P.S. Love what your project does on the AxonII segmented LED !


36

Thanks to the help of a benevolent Robot Overlord I now have an H-bridge plan using four (4) L298N ICs, wired in parallel, to provide a max of ~4A per channel (per motor).  Yes I will fuse at ~3.5A.

That done, I now need to identify an appropriate micro-controller to interface between the GPIO pins of a Raspberry Pi B+ and the L298N motor control circuits. I prefer to build the circuit myself rather that use an Arduino or some other 3rd party add-on board.

That said, if all else fails I would consider a breakout board kit to accomplish my DIY goals - hey swimming upstream is difficult.

In a perfect robot world the controller chip would be identified by the Pi software at boot time including loading all the necessary drivers - yes like an official Pi Hat. Hey old guys are dreamers too.

Thanks for any advice you may provide.
Cheers,

37
Software / Re: Webbotlib Studio FBoot only works the first time!
« Last post by Hero I on October 09, 2014, 08:39:05 AM »
In the Webbotlib Studio FBoot window there are two check boxes. One labeled "Program" and the other labeled "Verify." The window pops up with both set on by default.

I decided to test by setting and unsetting these check boxes to see what results I would get. Here are some of the results...

Attempt Program Verify Result 
------- ------- ------ ------
   1      on     on      OK
   2      off    on      OK
   3      on     off     fail
   4      off    on      fail
   5      on     off     OK
   6      off    on      fail
   .       .      .       .     
   .       .      .       .     
   .       .      .       .     

So, it looks like I did get some success after the first attempt, but it was hit and miss. I could not discern a pattern.

I'm hoping this new information will help you determine what the problem might be.
38
Software / Re: Webbotlib Studio FBoot only works the first time!
« Last post by Webbot on October 08, 2014, 06:49:42 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?

Yep - Windows 7 (Home Premium) 64 bit
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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?
40
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?
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