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Mechanics and Construction / Re: Robot Construction Log
« Last post by FIFO on January 29, 2016, 04:18:27 PM »
I think what you are doing is awesome!


    So I have been testing the 8085 CPU and the 8155 peripheral chips. As of now I have not been able to get the 8155s to work, however I have tested the 8085 and it seems to be working (I checked the A/D lines and the Read, Write, IO/M, and Address latch lines with an oscilloscope, and they seem to be operating correctly).

    I also read the data sheet for the 8085 again and found that a RC network was needed on the reset pin, and that a capacitor was needed on the 3 MHz crystal, so I added them, but it did not fix the problem.

    When I was examining the chips, I found that the 8085 marked 8085A, and that two of the 8155s were marked 8155H-2 and the other was marked 8155HC. It turns out the H in 8155H-2s signifies that they are HMOS versions of the 8155, and the 2 means that they are faster versions of the 8155. I am now wondering if I have a compatibility problem with the 8085A interfacing to the 8155H-2s.

    I still have more testing to do on the 8155s, but if I can't find the problem, I will probably post on some EE forums to see if anyone has any ideas as to what is happening.

Mechanics and Construction / Re: Selecting motor for self balancing robot.
« Last post by bdeuell on January 27, 2016, 05:02:59 PM »
you will want to use a servo (which just means there is close loop feedback control) so that could be a brushless motor or any other type of motor. Brushless servo motors are very common in industrial applications. if you have a geared reduction (which you will probably need) low backlash will be very important.
Misc / Re: Soldering smoke questios.
« Last post by GrillBot on January 27, 2016, 08:49:16 AM »
Just ran into this today . . . how to make a cheap custom fume hood for all your soldering and dangerous chemical needs ;D

This looks cool. I think I need to get one of these as I've been inhaling way too much fumes lately and have been coughing like a miner.
Software / (touch not working) SainSmart MEGA2560 R3 + 7" 7 Inch TFT
« Last post by Tommy on January 26, 2016, 06:33:54 AM »
Last week I received one of the units in the link below, after downloading the UTFT and UTOUCH
libraries I was able to get the Display to work with the arduino setup codes listed below, but after
spending days searching the net for different setup codes I still can't get the Touch function to work.
with these codes, it response to a touch but, only returns -1 myTouch.getX(), and myTouch.getY();

void loop()
  while (true)
    if (myTouch.dataAvailable())

after doing a calibrations it returns values if 0 for both X,Y but does give a pressure value.   

link to the item:

arduino setup codes:
UTFT          myGLCD(CPLD,38,39,40,41);
UTouch        myTouch(6,5,4,3,2);
UTFT_Buttons  myButtons(&myGLCD, &myTouch);
void setup()


because I get good display results and at least it responses to pressure I'm thinking
it's my setup codes.

anyone had a chance to work with this unit and get the touch working?

Mechanics and Construction / Re: My Advanced Realistic Humanoid Robot Project
« Last post by artbyrobot1 on January 25, 2016, 04:31:42 PM »
Here's the clay sculpt of the rib cage for the robot.
Software / Re: Rebuilding code and converting it to .hex in AVR Studio 4
« Last post by mklrobo on January 21, 2016, 06:41:50 AM »
 :-\ Hello!
That is EXACTLY one of the other problems that I was having. my only recourse was to buy a hardware
programmer from China. Studio 4 did recognize the device , and appeared to "talk" to the Axon.
The only problem left, was to compile a source file, ultimately, to an ELF file. This is the point
that I am at now. (hardware device is in a 500 series, as defined in the document files)
I loaded Studio 6.2, and tried the programmer with that. Did not work. :'(
HOWEVER, the source file DID make an ELF file. At that point, my 500 programmer would not
work with studio 6.2, but the program requested a 600 version. I looked this up, and it was
expensive. Tried to use the 6.2 studio ELF file to be loaded from the Studio 4 platform, to the
Axon, but did not work. (Was a long shot, just wanted the thing to work.  >:(  )
Trying to use programmers and files from different platforms will not work, as libraries and
protocols are different.(I found out the hard way). If you can derive a solution, Please advise.  :'(
Software / Re: Rebuilding code and converting it to .hex in AVR Studio 4
« Last post by Ahdem99 on January 20, 2016, 07:50:11 PM »
Also, even though i install the USB driver, it doesn't recognize the device (Axon II in this case). Do you know what is the problem?
Mechanics and Construction / Re: My Advanced Realistic Humanoid Robot Project
« Last post by artbyrobot1 on January 20, 2016, 11:41:47 AM »
Here's a little update on the project.  Finally got the hand bones joined and ready to rig!

Also, here's a link to the hand video where I demonstrate its range of motion:
Software / Re: Rebuilding code and converting it to .hex in AVR Studio 4
« Last post by mklrobo on January 20, 2016, 06:48:51 AM »
 :) Hello!
Yes, I have had a similar problem. I can not convert to the elf file, which is needed for final
download. Even then, you may not be able to download via your USB, because you may need
a "virtual" USB software driver.(available in the tutorials). I eventually bought a separate hardware programmer, which studio 4 recognizes, but still did not have the elf file.  :'(
Getting closer to the answer, though................. :-\
Software / Rebuilding code and converting it to .hex in AVR Studio 4
« Last post by Ahdem99 on January 19, 2016, 06:49:28 PM »
Hey guys, im working on my first robot, so i`m new to robotics, also new to programming, so, when i make my project with Project Designer, i get to the point where i need to convert the code that PD made, into .hex. I do it using AVR Studio 4. As it says in the tutorial, i go to build, then Rebuild all, but it always ends up with an error :
make:  *** No rule to make target `../../../All', needed by `VR_Axon2_demo.elf'.  Stop.
Build failed with 1 errors and 0 warnings...
So, i got stuck by this, and i cant really do anything. I did it several times, and i always get this error. I`m using WindowsXP, and i think that the problem is naming the files, and i don`t know where i did wrong.
Please help meee!

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