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vinicius.jlantunes

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  1. Like
    vinicius.jlantunes reacted to kd8bxp in Obstacle Avoidance Robot Using TI Launchpad MSP432   
    My latest demo robot for a Automation club I belong too, thought people here might get some use out of it too - since I used a Launchpad MSP432 board :-) 
     
    http://www.instructables.com/id/Obstacle-Avoidance-Robot-Using-TI-Launchpad-MSP432/
  2. Like
    vinicius.jlantunes got a reaction from tripwire in TI has free shipping through Oct-23   
    TI store is having another free shipping promotion through October 23 - https://store.ti.com.
     
    No coupon required.
  3. Like
    vinicius.jlantunes got a reaction from enl in TI has free shipping through Oct-23   
    TI store is having another free shipping promotion through October 23 - https://store.ti.com.
     
    No coupon required.
  4. Like
    vinicius.jlantunes got a reaction from bluehash in TI has free shipping through Oct-23   
    TI store is having another free shipping promotion through October 23 - https://store.ti.com.
     
    No coupon required.
  5. Like
    vinicius.jlantunes got a reaction from Fmilburn in TI has free shipping through Oct-23   
    TI store is having another free shipping promotion through October 23 - https://store.ti.com.
     
    No coupon required.
  6. Like
    vinicius.jlantunes got a reaction from Fred in TI has free shipping through Oct-23   
    TI store is having another free shipping promotion through October 23 - https://store.ti.com.
     
    No coupon required.
  7. Like
    vinicius.jlantunes got a reaction from dubnet in TI has free shipping through Oct-23   
    TI store is having another free shipping promotion through October 23 - https://store.ti.com.
     
    No coupon required.
  8. Like
    vinicius.jlantunes got a reaction from bluehash in Mailbag   
    Got my free shipping bounty today as well.
     
    I feel guilty ordering samples on their own, so I thought when buying these things - "well, will add a few other goodies as it won't cost them much more to add to the same package". Funnily though, I received a total of 4 separate packages for all the stuff - one with the booster pack, one with the MSP432, one with only 2 other IC's I paid for, and one with all the samples...
     
    I know it's peanuts for TI, but they must have made a loss on my ~45 bucks order! You gotta love TI!
     

  9. Like
    vinicius.jlantunes got a reaction from chicken in Mailbag   
    Got my free shipping bounty today as well.
     
    I feel guilty ordering samples on their own, so I thought when buying these things - "well, will add a few other goodies as it won't cost them much more to add to the same package". Funnily though, I received a total of 4 separate packages for all the stuff - one with the booster pack, one with the MSP432, one with only 2 other IC's I paid for, and one with all the samples...
     
    I know it's peanuts for TI, but they must have made a loss on my ~45 bucks order! You gotta love TI!
     

  10. Like
    vinicius.jlantunes got a reaction from dubnet in Electronic Materials and Devices course by MITx starting soon on edx   
    As title says: what appears to be a very interesting course is about to start on edx:
    https://www.edx.org/course/electronic-materials-devices-mitx-3-15-1x#!
     
    I will not be able to take this one as I am taking one other series of courses from MITx on Supply chain (related to work) and they take A LOT of time. This other MITx course I'm taking is amazing, which is why I am posting this one here. Looks like their courses are a bit better than the edx average.
     
    Good luck for anyone trying it!
  11. Like
    vinicius.jlantunes reacted to greeeg in GPS logger for a local Beagle club   
    Realized I haven't done much work on these for alittle while. It's very close to a working product, so yesterday I devoted to push it over the line.
     
    Dissembling a my first battery allowed me to clone the wire lengths, a small amount of kapton is used to insulate the terminals and PCB

     
    A snug fit. If another version is to be made I think I'd make some small alterations to the PCB shape.

     
    Grey unit, showing the LED windows and custom molded button.

     
    I'm bad at performing regular commits. I'm trying to improve this. I hadn't even committed the final PCB layout, even though I ordered the PCBs back in Feb.

     
    Stuff that got done
    HardwareBatteries (protection + wiring) FirmwareProper KML formatting (my initial implementation put too many errors while the gps was acquiring a fix) Button hold for power on/off Better debug output Two open files (FatFS makes this super easy) Increasing GPS data rate to 2Hz (10Hz is possible with these modules, but overkill for this application I think) Enabling long file names(FatFS makes this super easy) Enabling folders on the SD card(FatFS makes this super easy) Extracting time from GPS, using it to name saved logs and file creation date/time Making LED feedback more consistent Timezone correction from GPS UT timezone Fixed LEDs blinking for USB chargers with no USB communication  
    It's been working well on my bench. I'll have to take it out for more real world testing over the next week.
    I haven't done anything with the USB bootloader concept. This will only happen if I get enough time.
  12. Like
    vinicius.jlantunes reacted to ulix in Have feedback for TI? Please share here.   
    Hi,

    the only thing I want to have from TI: Reasonable International Shipping Costs.

    I stopped ordering from TI because of this! I don't buy much, so buying from distributors isn't economical for me.
    I'm avoiding TI products, always looking for alternatives from other Component Manufacturer.
    This is not only because of the shipping, there are no samples anymore for students (not only when asking directly). I'm not looking to save a penny, I would buy from TI!
    AND I'm a big fan of their stuff... I made every survey they send out vai email, but then I stopped. Why should I make a survey which is my time and in feedback I get nothing? No good shipping,(samples)! Nothing...

    Look at NXP, they are more active with their NXP Cup why does TI doesn't make things like this? Sometimes I think they are not interested in the university students...

     
  13. Like
    vinicius.jlantunes got a reaction from bluehash in Pi day - 3.14 USD freight on all TI store orders today (03/14)   
    Just got this in the mail - 3.14 USD freight on all TI store orders today (03/14).
     
    On my last orders to Brazil I have been charged 7 USD, so it's a good discount for me. It wasn't clear to me if it is valid worldwide, but for those folks who were being charged 21 USD, could be a great chance for buying what you need!
  14. Like
    vinicius.jlantunes reacted to RogueGeek in Launchpad Timer Reference Oscillator   
    I'm working on building a speed controller for a belt grinder and I'm using a G2553 for the controller.  Since the speed of the motor will need to vary between 1000-8000 RPM, the 32.768Khz clock was too slow and the DCO was drifting too much and causing the RPM to vary by several hundred counts even when the motor was running at a constant stable speed. This in turn caused the PID loop to act really weird and I could not hold a stable speed.  What I needed was a stable reference oscillator to use for sensing the RPM of the drive motor. 
     
    Being stubborn, I wanted to do this with only a single G2553 cpu and since the 2553 isn't spec'd to use a high freq crystal I went looking for an alternate way to provide a reference for the timers.  I was quite happy to discover that P1.0 can be configured as an input for an external timer reference. Thus the "Launchpad Timer Reference Oscillator" was born. 
     
    In my application I'm using a 16MHz oscillator, but any speed could be used to fit the given application.
     
     

    It is a small 0.3" x 1" pcb with an Abracon oscillator, a 0.1uF cap., and connectors.
     
    It only took a minor code change to have the Timer use the external reference and so far it seems to have resolved my timing issues.
     
    While this is without a doubt the most simple PCB I think I have ever designed, it just may turn out to be one of the most useful.
    I will definitely be including an external reference oscillator in any of my future projects that need very accurate time references.
     
    Here it is in action.

     
     
    thanks for looking
     
    Brian
     
  15. Like
    vinicius.jlantunes got a reaction from agaelema in Products using MSP430   
    I was watching Dave Jones video about the smart tweezers I've been wanting to buy, and it has got an MSP430 in there.

  16. Like
    vinicius.jlantunes reacted to bluehash in Free shipping at Arrow, including Launchpads and dev kits   
    https://www.arrow.com/en/research-and-events/articles/free-shipping-feb16
     
    Good to use if you want to escape the $7 TI Store shipping.
    No code needed.
  17. Like
    vinicius.jlantunes got a reaction from spirilis in Great deals in the TI Store Celebrating Engineers Week!   
    Got an email yesterday about some deals TI is offering this week. The MSP432 launchpad is selling by USD 4.32 again, plus some other cool stuff.
     
    I am tempted by a CC3200 LP, but I think I have to stop kidding myself and do something with the stack of LP's I already have before buying more...
     
    http://www.ti.com/corp-tistore-null-engineersweek2016-bhp-lp-null-wwe
  18. Like
    vinicius.jlantunes got a reaction from bluehash in Great deals in the TI Store Celebrating Engineers Week!   
    Got an email yesterday about some deals TI is offering this week. The MSP432 launchpad is selling by USD 4.32 again, plus some other cool stuff.
     
    I am tempted by a CC3200 LP, but I think I have to stop kidding myself and do something with the stack of LP's I already have before buying more...
     
    http://www.ti.com/corp-tistore-null-engineersweek2016-bhp-lp-null-wwe
  19. Like
    vinicius.jlantunes got a reaction from pyrosster in Great deals in the TI Store Celebrating Engineers Week!   
    Got an email yesterday about some deals TI is offering this week. The MSP432 launchpad is selling by USD 4.32 again, plus some other cool stuff.
     
    I am tempted by a CC3200 LP, but I think I have to stop kidding myself and do something with the stack of LP's I already have before buying more...
     
    http://www.ti.com/corp-tistore-null-engineersweek2016-bhp-lp-null-wwe
  20. Like
    vinicius.jlantunes reacted to greeeg in GPS logger for a local Beagle club   
    Ran the enclosures through my Mill, made a little jig to aid in positioning.


     
    There are a few issues left to sort out.
    PCB is not retained downward in the enclosure, when removing USB the PCB lifts upwards. LEDs leak light between their corresponding holes in the enclosure Button needs a mechanism to reach up through the case. I plan to solve these issues by creating 2 custom parts.
    Part A:
    This part will wedge between the PCB and top of the enclosure. Have holes over the LEDs to create light pipes out of the enclosure. A channel around the button to house a switch cap, part B. Part B:
    Switch cap, poke through the cutout in the enclosure  
    I decided to use my CNC to make molds to form the parts out of polyurethane. Straight from the CNC. You can see the switch part took a few attempts to get the tolerance right.

     
    Fitted


     
    Button fits perfectly flush with the case to avoid accidental presses.



     
     
  21. Like
    vinicius.jlantunes reacted to Fmilburn in [Energia Library] Rotary Encoder with Coarse / Fine Adustment   
    This is an Energia sketch designed to be used with a rotary encoder with push button.  The difference is that input can be made coarser or finer by pushing the button.
     
    The need came about because I wanted to be able to adjust a frequency generator between 1 and 40 MHz with fine adjustment on the order of 1 Hz with a simple interface on the board.  A potentiometer would not work due to low resolution and jitter.  Buttons or a simple encoder might work but it would take a lot of button pushing or knob turning to get from 10 Hz to 10 MHz.  I thought about a solution where the rate of turning the knob would determine the incremental increase or decrease but that seemed fiddly.  I could use multiple buttons but I liked the idea of a knob and in the end I only had one rotary encoder on hand.
     
    So my solution was to use the encoder push button to provide for coarse to fine adjustment.   For example, the encoder can be set to increase or decrease the value by 100 with a twist.  By pushing the button it can be made to improve fine control by say 1 value per click.  This allows the user to rapidly change values or achieve fine  control as desired.
       
    The sketch is here.
     
    A couple on additional points:
    Capacitors were used for hardware debouncing.  You may wish to modify the sketch or use a different encoder scheme with software debouncing. Interrupts were used for both encoder pins and the switch.  You may need to change the pins to a port with interrupt capability with different LaunchPads.  The sketch allows the minimum and maximum values to be set, as well as the change rate for coarseness. It seems to work pretty well although it is a cheap encoder and with a minimal effort I can now rapidly change the frequency on my AD9850 and see the results on the FR6989 LCD.
     

    I still need to put together a BoosterPack....  Tested with Energia V17 on the following LaunchPads:  MSP-EXP430FR6989, EK-TM4123GXL and MSP-EXP432P401R.
     
    UPDATE:  There is a 43oh post that shows the BoosterPack I created here:  http://forum.43oh.com/topic/9402-ad9850-frequency-generator-boosterpack/
  22. Like
    vinicius.jlantunes got a reaction from Fmilburn in Products using MSP430   
    I was watching Dave Jones video about the smart tweezers I've been wanting to buy, and it has got an MSP430 in there.

  23. Like
    vinicius.jlantunes got a reaction from Fmilburn in edx.org course - Structural art: bridges   
    A bit off-topic for the forum but maybe others here, like me, have a general interest in engineering topics.
     
    I'm taking this course on edx: The Art of Structural Engineering: Bridges
    https://courses.edx.org/courses/course-v1:PrincetonX+CEE262.1x+1T2016/info
     
    Just finished first week (it began last Friday), very cool so far!
  24. Like
    vinicius.jlantunes reacted to Fred in 43oh wins TI Community Highlight Award   
    Too shy to tell us yourself, @@bluehash? Well, I'll have to do it then!
     
    It looks like 43oh has won TI's Community Highlight Award. Definitely well deserved. This place has always been a great source of help and inspiration. Probably the reason why I use TI stuff rather than anyone else's.
     
    Well done.
  25. Like
    vinicius.jlantunes reacted to bluehash in 43oh wins TI Community Highlight Award   
    Thank you all.
    Not to forget that the forum continues to exist because of you all posting and sharing information. I'm super excited for the new year.
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