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Donny M. Carter

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  1. Like
    Donny M. Carter reacted to username in MSP430 Nixie Clock   
    3 hr to build and looks great! Note, you can download instructions on RobG's Tindie page and they are quite nice!
     

     
    Thanks RobG
  2. Like
    Donny M. Carter reacted to RobG in MSP430 Nixie Clock   
    This is how the display case option will look like.
    Standoffs will be white nylon, not brass. Screws will be silver.
    Faceplate can be used in 2 different ways, horizontal and vertical.
     

  3. Like
    Donny M. Carter reacted to RobG in MSP430 Nixie Clock   
    Little demo
     

  4. Like
    Donny M. Carter reacted to RobG in MSP430 Nixie Clock   
    Are you kitting me?
     
    Yes, yes I am!
     

     

     
    BTW, I will also have Nixie tube power supply kits.
     

     
     
     
     
  5. Like
    Donny M. Carter 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.
     

  6. Like
    Donny M. Carter got a reaction from multivac in The Cramp! 430 powered desktop crane lamp   
    Cool project! Thanks for sharing!
  7. Like
    Donny M. Carter reacted to multivac in The Cramp! 430 powered desktop crane lamp   
    Hey guys, so I`ve been working on this project for a while now, and wanted to show it here because you are a cool bunch.
    if i mess up, the pics are too big, or  whatever, im sorry. let me know and ill fix it asap.
    the title is pretty explanatory so here are some pics of the thing, and the associated mess (if i actually manage to attach pictures correctly)



    i know there is nothing particularly interesting in this from the microcontroller point of view, but maybe someone will like it.
    its sort of based on a liebherr lr1750 crawler crane in case anyone is interested. it is controlled with an ir remote kindly donated to the project, mostly made from scrap from my junk bin and some chips i got from the VERY generous TI`s sample program. The base, for example, is made from an old hdd, and the hole thing is screwed to, and pivots around, the main bearing.




     
    Some stuff i had to buy though, like the leds.
    I was thinking what could I do with a lot of solid conductor wire i pulled from the walls in my house when i changed the [way too old] electrical installation. i thought a lattice structure would be fun, and i have to say, its amazing how rigid the thing got. i also wanted to do some switching led driver experimenting. I used a TI TPS61199 led driver with 32 "5050" leds, that have 3 chips per package, so its 96 leds in all, at 17 mA each. the leds are mounted on a structure that is supposed to resemble a section of Eero Saarinen`s twa flight center. a sort of rebar core type thingy for the roof.



    i wanted to do a solid thing for the lamp, but it proved somewhat hard, i still might though. I





  8. Like
    Donny M. Carter got a reaction from cubeberg in Build thread - 3 Axis pen plotter   
    @cubeberg, very cool project!
  9. Like
    Donny M. Carter 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
  10. Like
    Donny M. Carter reacted to JWoodrell in classic electronics troubleshooting :)   
    hey guys, I recently got in the mail a rather unique controller for the NES that I have wanted for a while.  it is the "VAUS" or arkanoid controller for the NES.  it is fascinating that it works because it takes a rotary input and encodes it into the 8 bit pulse that the NES gets in from its controllers.  but the cool thing is it does this without any micro controller, and without any A/D Converter chip.
     
    after reverse engineering the circuit today and mapping it out.  I took a photo of the front and back of the board, then superimposed the layout on the back onto the components on the front so i could easier see what was wired to what, kinda like working in eagle, but with photos. The schematic is wired right to keep track of stuff, but the components aren't named correctly, (aka R6, C4, whatnot)


     
    It turns out to be a 556 timer chip (that threw me for a loop because the marking on the chip is "MC3456P", and I had to read hiding in its datasheet that it was a "pin for pin replacement for a NE556", although what is funny is once it was de-soldered, the silkscreen under the chip said "NE556" right on the board).  the 556 was running a fixed "fast" clock, and a slower variable clock based on the rotary potentiometer as the resistor for the timer.  there is a quad NAND chip for some logic, and a 12 bit Counter to count how many "fast" pulses happen within the "slow pulse",  this counter chip feeds a parallel input 8 bit shift register so that the NES can clock out the 8 bits of data about the position of the rotary pot.  it is brilliant in its brute forcing method.
     
    however they are known to be finicky and just stop working for no reason.  but thankfully since it is a hard circuit, it is just down to verifying out each of the 4 chips as to their function.
     
    Mine wasn't working when it got here, (even though it was advertised as good).  ahh well I enjoy a challenge.  The shift register was spitting out data, but it was garble that had no relation to the potentiometer.  testing back up the circuit it turned out the "fast" clock on the 556 was being unstable in its pulse length.  Everything Ive seen is that the 555 series are fairly rugged and bulletproof, so i assumed a cap had failed and wasn't oscillating the timer like it should.  so i wen about de-soldering all the caps belonging to the 556 and testing them out.  they looked good, so then i realized the 556 itself had bricked sometime in the last 20 some odd years.  luckily I had a 556 in my bits box, and replaced the chip (de-soldering a DIP16 package with just a regular soldering iron it an interesting task.
     
    anyway the clock is much happier now, and I will complete the testing and reassembly tomorrow to see if its fixed,  you can see the before and after clock trace on the 556 output pin


     
    I enjoy troubleshooting stuff like this, because there is no help, no place to lookup a solution, just a thing that doesn't work, your test equipment and you.   I'm getting griped at that it is too late, and I need to come to bed
    VAUS.sch
  11. Like
    Donny M. Carter reacted to cubeberg in SMD LED Matrix Booster   
    ****Kits available in the 43oh store
     

     
    Sorry about the focus on the video - my camera didn't like the bright LEDs moving all over the place
     
    This was created as a SMD learner board.  There are 90 SMD components (2 shift registers, 8 transistors, 64 LEDs and 16 resistors).  LEDs are arranged in a Common Cathode configuration.
     
    I've attached the eagle files, two CCS projects (one that's the Game Of Life demo seen in the video, the other is a test) and a test Energia project (although I'm having trouble getting it to refresh the display fast enough).  
     
    I'll post BOM in a bit.  I ran into a bit of an issue - the pinout for the transistors that I picked from eagle had two of the pins swapped, so I had to solder them upside-down.  Not too bad - I've already got a fixed design in eagle.
     
    ***Attachments***
    LED_MatrixEnergia.txt - test file for Energia
    LED_Matrix_V1_Eagle.zip - board and schematic files from Eagle
    Test_CCS.c - simple tester - runs through all LEDs one at a time
    Conway_CCS.c - Conway's game of life - includes a dual screen buffer - would be a good starting point for an app
     
    ***Assembly information***

    Solder LEDs with the Anode (+) pointing towards the top of the board.
    Transistors need to be soldered upside-down.  I'll fix this if I run another version of the board.
    Shift register alignment is indicated on the board.  
    LED Resistors are by column - so if you're mixing colors - make sure the whole column has the same voltage/current requirements - the number next to the resistor on the back corresponds to the column marking on the front.
    LED_MatrixEnergia.txt
    LED Matrix_V1_Eagle.zip
    Test_CCS.c
    Conway_CCS.c
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