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dpharris

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  1. Like
    dpharris got a reaction from spirilis in A new Tiva C LaunchPad about to be Announced!!!!!   
    My two EK-TM4C-1294XL kits just arrived today via FedEx.  No Ethernet port on my MacBook!  
  2. Like
    dpharris reacted to igor in eLua for Stellaris Launchpad   
    Thank you dpharris for running the test, and a especially thank you for the detailed feedback (i.e. entering it interactively) really helped to know which eLua statement failed. 
    I fixed an error in pwm.setup and posted a new binary (replaced attachment in message 22, above).  If you feel like running the test again would appreciate.  
     
    (If it doesn't work might be tidier to send me a PM with the symptoms/results.)
  3. Like
    dpharris got a reaction from igor in eLua for Stellaris Launchpad   
    I typed this in: 
    > tmrid = 1
    > pwmid = 13
    > pwm.setclock( pwmid, 25000000 )
    > tmr.start( tmrid )
    > crtduty, incr = 10, 5
    > pwm.setup( pwmid, 50000, crtduty )
     
    And got: #####
     
    And then no response, and I had to reset the board.  
  4. Like
    dpharris reacted to t0mpr1c3 in [Group Buy-18][D] WS2812 SMD RGB LEDs with integrated driver chip   
    LED GROUP BUY CLOSED
     
    GROUP BUY FOR CLOCK PCBs CLOSED
     
    1900 WS2812Bs and 50 PCBs are on order. 1 set of 5 PCBs (to make 1 clock) are available, please sign up on this thread if you want them. Cost is $9.98. First come first served!
     
    =======
     
    As used in the LED ring clock in quantities of 120. It is a nuisance to buy 200 when you only want 120 plus a few spares. 4 lots of 125 = 500 LEDs which would cost around $85 shipped (surface) to me. 8 lots of 125 = 1000 LEDs which would cost around $165 shipped (surface) to me. 10 lots of 125 plus 50 extras = 1300 LEDs for $196.43 makes $18.89 per set of 125. After PayPal costs that's around $22 just under $20 per lot of 125 plus shipping from me (in USA) to wherever you are. Once we have enough people signed up I'll ask everyone to pay, and once everyone has paid I will order the LEDs.
     
    Datasheet
     
    If people want WS2812B's instead we could do that instead, as long as we all agree. Shouldn't be too hard to fix the LED ring clock design to handle that. I will be ordering WS2812Bs. Greg has kindly redone the Gerbers to match with some advice from RobG.
     
    Post on this thread to sign up, I'll keep a list on this post. Let's try to deal in units of 125. If you would like extras please indicate in your post. If enough people want extras we might get to the target quicker. I can also order PCBs and distribute them, but it definitely won't be worth it for less than 50 boards and it might be a bit marginal even for that quantity. which should present some kind of saving, but I'm not sure how much. 40 5x10 boards from Elecrow shipped DHL cost 4 * $12.90 + $28.26 = $79.86, or just below $10 per set of boards.
    Member      | Qty | OK with WS2812B? | PCB sets | Address | Payment Rec'd | Shipped ----------- +-------+------------------+----------+----------+---------------+-------- pyrosster | 150 | Y | 1 | Spain | Yes | cubeberg | 150 | Y | 1 | USA | Yes | dpharris | 150 | Y | 1 | Canada | Yes | greeeg | 250 | WS2812B only | 2 | Aus | Yes | vicvelcro | 125 | Y | 0 | USA | Yes | Yes marsbase | 250 | Y | 2 | USA | Yes | enl | 125 | Y | 0 | USA | Yes | Yes GeekDoc | 150 | Y | 1 | USA | Yes | dubnet | 125 | Y | 1 | USA | Yes | t0mpr1c3   | 150 | Y | 1 | USA | ---
  5. Like
    dpharris got a reaction from t0mpr1c3 in [Group Buy-18][D] WS2812 SMD RGB LEDs with integrated driver chip   
    I'm in: 125x yes;  25 extra yes; B's yes; pcb yes
  6. Like
    dpharris reacted to username in Reflow Oven Booster Pack   
    Howdy all,
     
    Got out of college recently so I got a tad bit more time. Figured I finish off my reflow project properly since i've been getting alot of requests for kits. I'm in the process of developing a through-hole based reflow oven kit that would be easy for any hobbyist to assemble.
     
    Source Code: https://github.com/NateZimmer/Reflow_Oven_Kit
    Schematic: Printing Print Schematic.pdf
     
     



     


     


     
    Deluxe Kit includes and features:
    - 1x 2.2" Touch LCD Display
    - Discrete Cold Compensation Circuit 
    - A high temp low thermal mass thermocouple
    - A high Current Solid State Relay
    - A RGB LED
    - Optional Female Header interface for launchpad
    - Optional External Power interface for wall supply.
    Price: 50 USD + Shipping
     
    Standard kit includes and features:
    - 1x Nokia 5110 Display
    - Discrete Cold Compensation Circuit 
    - A high temp low thermal mass thermocouple
    - A high Current Solid State Relay
    - Optional Female Header interface for launchpad
    - Optional External Power interface for wall supply.
    Price: 40 USD + Shipping
     
    I'll try to get a video up soon. Anyhow, standard kit is on hold for now. A couple deluxe kits would be available in a few days hopefully.
    Pushed back 4 weeks so I can do some more testing, development, and get parts from china =P
  7. Like
    dpharris reacted to NickO in Stepper Motor BoosterPack   
    Hey everyone!
     
    Here is a Stepper Motor BoosterPack I have been working on that utilizes the DRV8825. I just ordered the boards today and will be working on some code samples while I wait on them. The DRV8825 can drive one bipolar stepper motor or two DC motors. It has a 8.2-V to 45-V supply range with 2.5-A peak at 24-V. I tried to design for the full operating range of the chip while maintaining the BoosterPack size guidelines.
     
    http://www.ti.com/product/drv8825
     
    Let me know what you think! I am working on a BLDC Motor BoosterPack as well that I will post later.
     
    Motor_Driver_DRV8825_BoosterPack.pdf


    BOM_DRV8825_BoosterPack.txt
     
     
  8. Like
    dpharris reacted to Rei Vilo in [Energia Library] LCD_screen Library Suite   
    Former library is at http://embeddedcomputing.weebly.com/serial_lcd-library-suite-for-4d-systems-screens
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