Jump to content

username

Members
  • Content Count

    305
  • Joined

  • Last visited

  • Days Won

    8

Reputation Activity

  1. Like
    username reacted to jpnorair in imp.guru Droplet and 915MHz Long Range Radio to WiFi   
    This is wrong.  I won't get started about HAM and ARRL, and how they destroy innovation in the modern era.  But at least you can figure out my opinion.
     
    Lower wavelengths represent smaller particles via the wave-particle duality, more smaller particles can be produced with a given energy level, and therefore lower wavelengths propagate better through any medium.
     
    What I assume this question and answer refer-to is practice rather than theory.  In a concrete bunker, VHF will propagate through the bunker much better than UHF.  In a building with windows and doorways, there are situations where the diffractive losses of a longer wave signal will result in greater attenuation than the bouncing of shorter wave signals.  This can be very experimental and it depends a lot on physical geometry, construction materials, etc.
     
    UHF is basically 300-1000 MHz.  Planet Earth and humans are scaled geometrically such than UHF often propagates well in "real-world" environments.  But does it really propagate better than a 30 MHz signal?  That's a stretch.
  2. Like
    username got a reaction from dubnet in MSP430 Nixie Clock   
    *spends sleepless nights staring at the tindie store page*
  3. Like
    username got a reaction from bluehash in Oven Kickstarter   
    Howdy all,
     
    Excited to say I started a kickstarter for my Reflow Oven Controller: 
    https://www.kickstarter.com/projects/1070729460/zallus-oven-controller
     
    Been working on these guys for quite a while now and would finally like to produce them in bulk. Sorry, no MSP430 =( Needed more beef & features at a lower price.
  4. Like
    username reacted to RobG in MSP430 Nixie Clock   
    MSP430 based Nixie tube clock.
     

     
    I was looking for some nice Nixie tube digit images so I could add them to my EduKit library, but I couldn't find any usable ones. I decided to just buy few of them and photograph myself. Then I thought that it would be a horrible waste if they just sit in a drawer. So here it is, my first Nixie project since... 1987.
     
    This clock will be available as kit, but since this is v1, I will most likely make some adjustments.
    Any suggestions are welcome.
     

  5. Like
    username got a reaction from RobG in Oven Kickstarter   
    Howdy all,
     
    Excited to say I started a kickstarter for my Reflow Oven Controller: 
    https://www.kickstarter.com/projects/1070729460/zallus-oven-controller
     
    Been working on these guys for quite a while now and would finally like to produce them in bulk. Sorry, no MSP430 =( Needed more beef & features at a lower price.
  6. Like
    username got a reaction from Fred in Oven Kickstarter   
    Howdy all,
     
    Excited to say I started a kickstarter for my Reflow Oven Controller: 
    https://www.kickstarter.com/projects/1070729460/zallus-oven-controller
     
    Been working on these guys for quite a while now and would finally like to produce them in bulk. Sorry, no MSP430 =( Needed more beef & features at a lower price.
  7. Like
    username got a reaction from cubeberg in Oven Kickstarter   
    Howdy all,
     
    Excited to say I started a kickstarter for my Reflow Oven Controller: 
    https://www.kickstarter.com/projects/1070729460/zallus-oven-controller
     
    Been working on these guys for quite a while now and would finally like to produce them in bulk. Sorry, no MSP430 =( Needed more beef & features at a lower price.
  8. Like
    username got a reaction from JonnyBoats in DAC GUI V2   
    Hey all,
     
    Round 2: This extends the peripherals of the MSP430 to a UART based ascii AT command set. For example, send "AT+GET_ADC" over the USB->Serial bridge to get all the ADC values returned. Since I released my first GUI there have been a couple others like it. You will find that this version's strength is that the underlying C driver set is my personal driver set which is quite powerful XD . I then wrote a C# GUI as a wrapper around this command set.
     
    Features Implemented: Digital IO, Analog I, PWM, SPI

     
    PWM Example:

     
    Steps to use:
    1. Download code & .exe file here: https://github.com/NateZimmer/ICBM
    2. Import C code into CCSV5.1 (haven't tested with other versions) and flash to launchpad.
    3. Ensure UART jumpers on the MSP430 Launchpad are set to Hardware based UART on a msp430g2553 launchpad Rev 1.5
    4. Run GUI and connect to launchpad.
    5. Enjoy!
     
    Skip to 10:35 for setup instructions:
     
     


     
    Todo:
    Implement DCO Calibration for better CLK accuracy
    Implement I2C
    Implement Graphing/Logging
    Implement more flexible spi chip select features
     
    Please let me know if this does not work for you
  9. Like
    username got a reaction from bluehash in [S]IV-18 VFD Clock Booster Pack   
    Whaaaa, 22 ohms isn't the same as 22k? *smackface*
     

  10. Like
    username got a reaction from cubeberg in [S]IV-18 VFD Clock Booster Pack   
    No worries, it was my bad. Thanks for the good kit!
  11. Like
    username got a reaction from RobG in [S]IV-18 VFD Clock Booster Pack   
    Whaaaa, 22 ohms isn't the same as 22k? *smackface*
     

  12. Like
    username reacted to cubeberg in [S]IV-18 VFD Clock Booster Pack   
    @@username 27v is a bit low - you need between 30 and 50 to light the tube - it's at least good that you're getting something though.  Did you check the resistors to make sure they measure as indicated on the silkscreen?
     
    Does the voltage go up/down if you adjust the potentiometers?  
     
    There are two really critical parts to lighting up the tube.  1 - voltage across the filament (direction doesn't matter - see pins 1 and 13 on the sheet) - connect one side to gnd and the other to 5v across a 22 ohm resistor (it's really supposed to be something like 1.2v - the resistor takes care of keeping the current low).  The second part is the 30-50v - if I remember correctly - that has to be applied to both an anode and at least one grid pin.  
    ***If you see anything starting to turn red - pull your connections and start over.  You have a few seconds before you fry something thankfully.
     
    Pinout is here - http://www.ladyada.net/media/icetube/IV-18.pdf
    Not really sure what the 10k resistors would be for...  The only ones used on the board are the adjustable pots.  
     
    My main laptop is on the fritz right at this second - I'll take a better look @ everything tomorrow night.  
     
    And one other thing - are any parts on the board getting hot?  
  13. Like
    username got a reaction from spirilis in [S]IV-18 VFD Clock Booster Pack   
    Whaaaa, 22 ohms isn't the same as 22k? *smackface*
     

  14. Like
    username got a reaction from bi0tech in DAC GUI V2   
    Hey all,
     
    Round 2: This extends the peripherals of the MSP430 to a UART based ascii AT command set. For example, send "AT+GET_ADC" over the USB->Serial bridge to get all the ADC values returned. Since I released my first GUI there have been a couple others like it. You will find that this version's strength is that the underlying C driver set is my personal driver set which is quite powerful XD . I then wrote a C# GUI as a wrapper around this command set.
     
    Features Implemented: Digital IO, Analog I, PWM, SPI

     
    PWM Example:

     
    Steps to use:
    1. Download code & .exe file here: https://github.com/NateZimmer/ICBM
    2. Import C code into CCSV5.1 (haven't tested with other versions) and flash to launchpad.
    3. Ensure UART jumpers on the MSP430 Launchpad are set to Hardware based UART on a msp430g2553 launchpad Rev 1.5
    4. Run GUI and connect to launchpad.
    5. Enjoy!
     
    Skip to 10:35 for setup instructions:
     
     


     
    Todo:
    Implement DCO Calibration for better CLK accuracy
    Implement I2C
    Implement Graphing/Logging
    Implement more flexible spi chip select features
     
    Please let me know if this does not work for you
  15. Like
    username reacted to jpnorair in STM32L0 USB Interface   
    Just a note: I'm building an open source project that utilizes STM32L0 as USB-UART gateway.  This chip has some interesting attributes, and it can create a low-cost, small geometry USB interface that is also programmable.  I'm building the CDC-ACM to UART version first, then an Android version that does the necessary authentication, and then finally a USB-Ethernet version so you can telnet to it (ssh is too much overhead).
     
    The idle current will be in the area of 2uA, so it's a good USB bridge for any low power project you may have, unlike most off the shelf bridge chips which are nowhere near this.
     
  16. Like
    username reacted to jpnorair in New Chip Alert: The ESP8266 WiFi Module (It's $5)   
    On a sour note: Broadcom has patents that must be licensed in order to market WiFi devices in most of the world.  China does not have much in the way of patent law.  If you're thinking about building a product to sell, I would avoid this module for legal reasons.  If not, then buy a bunch -- they might not be available at this price forever.
  17. Like
    username reacted to bluehash in LCD   
    Hi.


    View the full article
  18. Like
    username reacted to petertux in MSP430 tracker   
    here's my latest project, a fully open-source msp430f5510-based gps/gprs tracker. it's a device that wakes up every few minutes and does the following:

     - tries to get a gps fix
     - connects to the gsm network, marks the tower cell ids it talks to
     - executes sms commands received - if any
     - starts a gprs connection and sends all the info it has collected via http to my server

    it does all this only based on interrupts (zero blocking functions are used - all the similar projects I've seen are riddled with delay()s).
    functions that fail due to network unavailability are retried a given number of times.

    the data received on the server is placed into a database and gps positions of the cell towers are obtained for future triangulation. this info can be used if there is no gps coverage due to obstacles.
     


    to give a little context, I felt the need of making my own tracker because I bought something like this an year ago and quickly became dissapointed by the dubious quality of the hardware design and software of the product.

    here is the first prototype - the magnet wire was used to debug the hardware flow control-enabled UART of the sim900.



    the first assembled module is ready to be used on my trip to Greece. instead of a small flat LiPo I ended up using 2 cells from a discarded laptop battery - there was no time to wire this to my motorbike. now after ~20 days it is still tracking.



    I am pretty happy with this first revision, but I'm working on the next one that will include a small serial fram chip. I decided to use that as a buffer because of the weird way the mobile phone company is counting the gprs traffic.

    for some more eye-candy, you can see my route from home to Ouranoupoli on a google-map overlay here:
    http://www.simplex.ro/files/trips/test.html
     
    waypoints are 10 minutes apart, the trip took 10 hours and about 800km.

    project home: https://github.com/rodan/tracy
     

     
  19. Like
    username got a reaction from bluehash in Tricopter build   
    Ahh neat! Some nice cable management there. I really got to work on that. Thanks for sharing.
  20. Like
    username got a reaction from bluehash in Tricopter build   
    First ever multi-rotor build. The university had these parts lying around from a failed senior design project. Apparently all they managed to do was buy the parts. Considering the atrocity that it would be to let these parts simply lie around I built up the tricopter. Its not quite finished yet. I need some clockwise props for it & a rear landing gear. Uses a kk2.1.5 and all standard off the shelf hobby king parts.
     

  21. Like
    username got a reaction from reaper7 in Tricopter build   
    First ever multi-rotor build. The university had these parts lying around from a failed senior design project. Apparently all they managed to do was buy the parts. Considering the atrocity that it would be to let these parts simply lie around I built up the tricopter. Its not quite finished yet. I need some clockwise props for it & a rear landing gear. Uses a kk2.1.5 and all standard off the shelf hobby king parts.
     

  22. Like
    username got a reaction from dubnet in DAC GUI V2   
    Hey all,
     
    Round 2: This extends the peripherals of the MSP430 to a UART based ascii AT command set. For example, send "AT+GET_ADC" over the USB->Serial bridge to get all the ADC values returned. Since I released my first GUI there have been a couple others like it. You will find that this version's strength is that the underlying C driver set is my personal driver set which is quite powerful XD . I then wrote a C# GUI as a wrapper around this command set.
     
    Features Implemented: Digital IO, Analog I, PWM, SPI

     
    PWM Example:

     
    Steps to use:
    1. Download code & .exe file here: https://github.com/NateZimmer/ICBM
    2. Import C code into CCSV5.1 (haven't tested with other versions) and flash to launchpad.
    3. Ensure UART jumpers on the MSP430 Launchpad are set to Hardware based UART on a msp430g2553 launchpad Rev 1.5
    4. Run GUI and connect to launchpad.
    5. Enjoy!
     
    Skip to 10:35 for setup instructions:
     
     


     
    Todo:
    Implement DCO Calibration for better CLK accuracy
    Implement I2C
    Implement Graphing/Logging
    Implement more flexible spi chip select features
     
    Please let me know if this does not work for you
  23. Like
    username reacted to szhao in RC Car Made with LaunchPad Box   
    Since I am working on the Robotics Boosterpack with @@HylianSavior and @@jwp071, I decided to make a prototype with the box LaunchPad comes with. I've used Firmata to send command to LaunchPad. Check out my other post here. 
     


     
    A quick overview of what's inside.
    Hardware
    - G2 LaunchPad Box 
    - MSP430F5529LP
    - Fuel Tank Boosterpack
    - DRV8833 Motor Drive Control
    - HC-06 Bluetooth
    - Pololu Gear Motor
    - Caps, wires, breadboard
     
    Software
    - Firmata over serial (enabled by Bluetooth)
    - Energia Library on LP
    - NodeJS on PC
  24. Like
    username got a reaction from RobG in DAC GUI V2   
    Has the GUI worked for any of you?
     
     
    It was done in C# and my C# is an embarrassment. Until I learn how to code in c# as it was meant to be coded, I don't plan to share any of that code. My C code i'm fairly confident is up to snuff but certainly not my c# =(
  25. Like
    username got a reaction from BlackAngel in DAC GUI V2   
    Hey all,
     
    Round 2: This extends the peripherals of the MSP430 to a UART based ascii AT command set. For example, send "AT+GET_ADC" over the USB->Serial bridge to get all the ADC values returned. Since I released my first GUI there have been a couple others like it. You will find that this version's strength is that the underlying C driver set is my personal driver set which is quite powerful XD . I then wrote a C# GUI as a wrapper around this command set.
     
    Features Implemented: Digital IO, Analog I, PWM, SPI

     
    PWM Example:

     
    Steps to use:
    1. Download code & .exe file here: https://github.com/NateZimmer/ICBM
    2. Import C code into CCSV5.1 (haven't tested with other versions) and flash to launchpad.
    3. Ensure UART jumpers on the MSP430 Launchpad are set to Hardware based UART on a msp430g2553 launchpad Rev 1.5
    4. Run GUI and connect to launchpad.
    5. Enjoy!
     
    Skip to 10:35 for setup instructions:
     
     


     
    Todo:
    Implement DCO Calibration for better CLK accuracy
    Implement I2C
    Implement Graphing/Logging
    Implement more flexible spi chip select features
     
    Please let me know if this does not work for you
×
×
  • Create New...