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cde

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  1. Like
    cde reacted to oPossum in LED Animations / Effects   
    By your command.
     

    larson_dual.c
  2. Like
    cde got a reaction from xxx1 in Free shipping at Arrow, including Launchpads and dev kits   
    Applies to FedEx Ground, UPS Ground, USPS First Class Mail and FedEx International Economy only.
     
    I wonder what the Customs fee would be though. Some info says Fedex Int Economy has no brokerage fee.
  3. Like
    cde got a reaction from tripwire in Free shipping at Arrow, including Launchpads and dev kits   
    Applies to FedEx Ground, UPS Ground, USPS First Class Mail and FedEx International Economy only.
     
    I wonder what the Customs fee would be though. Some info says Fedex Int Economy has no brokerage fee.
  4. Like
    cde got a reaction from bluehash in Free shipping at Arrow, including Launchpads and dev kits   
    Applies to FedEx Ground, UPS Ground, USPS First Class Mail and FedEx International Economy only.
     
    I wonder what the Customs fee would be though. Some info says Fedex Int Economy has no brokerage fee.
  5. Like
    cde got a reaction from roadrunner84 in Running straight off Battery vs LDO   
    Found a nice app note by TI, and wrote some thoughts on it:
     
    Just recently read an app note that targets your same circumstances. Using power solutions to extend battery life in MSP430 applications By TI's Michael Day. While it uses the MSP430 as its target, the same applies to any MCU.
     
    Depending on the MCU's Current vs Voltage, and Voltage vs Clock Speed, using an LDO with a low Quiescent Current will be much better than powering the MCU directly off the battery. The example uses 2x AA, and a TPS780xx regulator with 0.5
  6. Like
    cde got a reaction from L.R.A in Running straight off Battery vs LDO   
    Found a nice app note by TI, and wrote some thoughts on it:
     
    Just recently read an app note that targets your same circumstances. Using power solutions to extend battery life in MSP430 applications By TI's Michael Day. While it uses the MSP430 as its target, the same applies to any MCU.
     
    Depending on the MCU's Current vs Voltage, and Voltage vs Clock Speed, using an LDO with a low Quiescent Current will be much better than powering the MCU directly off the battery. The example uses 2x AA, and a TPS780xx regulator with 0.5
  7. Like
    cde got a reaction from dubnet in Running straight off Battery vs LDO   
    Found a nice app note by TI, and wrote some thoughts on it:
     
    Just recently read an app note that targets your same circumstances. Using power solutions to extend battery life in MSP430 applications By TI's Michael Day. While it uses the MSP430 as its target, the same applies to any MCU.
     
    Depending on the MCU's Current vs Voltage, and Voltage vs Clock Speed, using an LDO with a low Quiescent Current will be much better than powering the MCU directly off the battery. The example uses 2x AA, and a TPS780xx regulator with 0.5
  8. Like
    cde got a reaction from Fmilburn in Running straight off Battery vs LDO   
    Found a nice app note by TI, and wrote some thoughts on it:
     
    Just recently read an app note that targets your same circumstances. Using power solutions to extend battery life in MSP430 applications By TI's Michael Day. While it uses the MSP430 as its target, the same applies to any MCU.
     
    Depending on the MCU's Current vs Voltage, and Voltage vs Clock Speed, using an LDO with a low Quiescent Current will be much better than powering the MCU directly off the battery. The example uses 2x AA, and a TPS780xx regulator with 0.5
  9. Like
    cde reacted to spirilis in Ultra Low Power   
    for the G2553, even the 20-pin versions, don't forget about P3... set P3SEL and P3SEL2 to 0 and P3DIR to 0xFF, P3OUT to 0.  It's not connected to any of the external pins but the port is there--and might cause some power consumption if left floating as inputs.
     
    The 28-pin TSSOP package of the G2553 has the P3 pins exposed (and probably the QFN variant).
  10. Like
    cde got a reaction from bluehash in protoboard   
    That protoboard was designed with the 430 launchpad in mind. It would only access J1 and J2, the original launchpad headers. If you look closely, you will see that the headers on it are offset. The assembly manual has a better picture. http://store.43oh.com/image/data/LPB_ProtoKit/LPB-ProtoKit_v1.0.pdf
     
    Instead of using a pass through or extra long header pins, it offsets the headers to one side, and joins them together. It may look like it has access to all four headers, but does not.
     
    That said, you could easily modify it for the 40 pin headers, by cutting the trace between the two sides, and using 4 sets of Stacking Headers. You'd also have to cut the 3.3V trace so that it wouldn't be tied to the 5V on J3. If you want it on the top, the stacking headers have to go female side down, meaning you'll have male pins on your side.
  11. Like
    cde got a reaction from greeeg in Want to learn how to use an Oscilloscope? What if a Msp430 Launchpad was involved!   
    Stumbled upon this. Tektronix, a producer of various engineering test equipment, including Oscilloscopes, happens to have a free to use/download set of courses for learning how to use an Oscilloscope.
     
    The more important part is that it uses a standard MSP430 launchpad + Energia to do it.
     
    http://www.tek.com/lab-course/learning-oscilloscope-operation-using-msp430-launchpad-board
     
     
    The search shows about 20 of the courses:
    http://www.tek.com/courseware/search?body=msp430&field_courseware_categories_value=1902&field_courseware_keywords_value=All&field_course_language_value=&uid=
     
    It's a marketing tool, but it's generic enough for any scope. They also have *shudders* arduino versions as well.
     
  12. Like
    cde got a reaction from oPossum in Want to learn how to use an Oscilloscope? What if a Msp430 Launchpad was involved!   
    Stumbled upon this. Tektronix, a producer of various engineering test equipment, including Oscilloscopes, happens to have a free to use/download set of courses for learning how to use an Oscilloscope.
     
    The more important part is that it uses a standard MSP430 launchpad + Energia to do it.
     
    http://www.tek.com/lab-course/learning-oscilloscope-operation-using-msp430-launchpad-board
     
     
    The search shows about 20 of the courses:
    http://www.tek.com/courseware/search?body=msp430&field_courseware_categories_value=1902&field_courseware_keywords_value=All&field_course_language_value=&uid=
     
    It's a marketing tool, but it's generic enough for any scope. They also have *shudders* arduino versions as well.
     
  13. Like
    cde got a reaction from bluehash in Want to learn how to use an Oscilloscope? What if a Msp430 Launchpad was involved!   
    Stumbled upon this. Tektronix, a producer of various engineering test equipment, including Oscilloscopes, happens to have a free to use/download set of courses for learning how to use an Oscilloscope.
     
    The more important part is that it uses a standard MSP430 launchpad + Energia to do it.
     
    http://www.tek.com/lab-course/learning-oscilloscope-operation-using-msp430-launchpad-board
     
     
    The search shows about 20 of the courses:
    http://www.tek.com/courseware/search?body=msp430&field_courseware_categories_value=1902&field_courseware_keywords_value=All&field_course_language_value=&uid=
     
    It's a marketing tool, but it's generic enough for any scope. They also have *shudders* arduino versions as well.
     
  14. Like
    cde reacted to maelli01 in input protection diodes, interesting video on eevblog   
    power an msp430 without power pins ;-)
     
    http://www.eevblog.com/2015/12/18/eevblog-831-power-a-micro-with-no-power-pin/
  15. Like
    cde got a reaction from Rei Vilo in Want to learn how to use an Oscilloscope? What if a Msp430 Launchpad was involved!   
    Stumbled upon this. Tektronix, a producer of various engineering test equipment, including Oscilloscopes, happens to have a free to use/download set of courses for learning how to use an Oscilloscope.
     
    The more important part is that it uses a standard MSP430 launchpad + Energia to do it.
     
    http://www.tek.com/lab-course/learning-oscilloscope-operation-using-msp430-launchpad-board
     
     
    The search shows about 20 of the courses:
    http://www.tek.com/courseware/search?body=msp430&field_courseware_categories_value=1902&field_courseware_keywords_value=All&field_course_language_value=&uid=
     
    It's a marketing tool, but it's generic enough for any scope. They also have *shudders* arduino versions as well.
     
  16. Like
    cde got a reaction from yosh in Want to learn how to use an Oscilloscope? What if a Msp430 Launchpad was involved!   
    Stumbled upon this. Tektronix, a producer of various engineering test equipment, including Oscilloscopes, happens to have a free to use/download set of courses for learning how to use an Oscilloscope.
     
    The more important part is that it uses a standard MSP430 launchpad + Energia to do it.
     
    http://www.tek.com/lab-course/learning-oscilloscope-operation-using-msp430-launchpad-board
     
     
    The search shows about 20 of the courses:
    http://www.tek.com/courseware/search?body=msp430&field_courseware_categories_value=1902&field_courseware_keywords_value=All&field_course_language_value=&uid=
     
    It's a marketing tool, but it's generic enough for any scope. They also have *shudders* arduino versions as well.
     
  17. Like
    cde got a reaction from bluehash in Products using MSP430   
    From the same link
     
    Spy-Bi-Wire broken out. Hmmmm
  18. Like
    cde got a reaction from RROMANO001 in TI will no longer accept .edu addresses for samples   
    Is teaching students to use unreliably sourced products wise and/or ethical? Won't that work against them in the field when they attempt to design based on unrealistic dev and production costs? Just a thought.
  19. Like
    cde got a reaction from RobG in TI will no longer accept .edu addresses for samples   
    Is teaching students to use unreliably sourced products wise and/or ethical? Won't that work against them in the field when they attempt to design based on unrealistic dev and production costs? Just a thought.
  20. Like
    cde got a reaction from bluehash in Geeky Tattoo   
    The blue smoke? R.I.P.
  21. Like
    cde got a reaction from cubeberg in Geeky Tattoo   
    The blue smoke? R.I.P.
  22. Like
    cde got a reaction from yyrkoon in Who is using MSP430G2553?   
    Regulating down is easy enough, but the need to level shift every input and most outputs is not miniscule.
  23. Like
    cde got a reaction from simalrow in Why does this code's iF statement not work   
    warning: suggest parentheses around assignment used as truth value
     
    This is explaining what went wrong. An if statement has two parts, the if command telling the microcontroller to run a test, and the test condition.
     
    Here you don't use a test condition. Instead, you use an assignment. "buttonState =0"
    That is, you are assigning 0 to buttonState.
     
    Common mistake.
     
    You need to use a test comparator. That's two equal signs in a row. buttonState == 0. 
     
    Honestly, that both assignment and "is equal to" have similar characters is as dumbas the constant use of X as a variable in math when multiplication symbol is x. It is just asking for legibility issues like this, but its hard to change decades of coding habits.
  24. Like
    cde got a reaction from morelius21 in Debounce switch routine watchdog not work   
    Because you are reenabling the P1 Interrupt inside of the P1 Interrupt, making the Watchdog pointless.
     
    Remove "P1IE |= buttonTotal;    //activ interrupt" from the interrupt. Now the watchdog should enable the interrupt after a single 32mS interval triggers the watchdog interrupt.
  25. Like
    cde reacted to Druzyek in LED Sombrero   
    Here is a project I started working on for our hackerspace's Halloween party but didn't finish in time. It is three 4x4 LED matrixes, one each for red, green, and blue. Each is driven by a shift register. The LEDs are from a string of Christmas tree lights. The control board has potentiometers for speed and color control.
     

     
    Here is a video of some of the patterns:
    http://youtu.be/yC3cBqeHkpk
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