Leading Edge DC-2214 / DC-3014 scrap parts project

Hi Guys,
I'm starting a new project with some spare pieces I got from some board members.

  • The case is from a DC-2214 and the PCB is from a DC-3014. I got both of these from Mike
  • I'm hoping to get some SKCM cream switches from gainsborough pretty soon.
  • And I have a bunch of cool alps keycaps that I've been hoping to make use of.

I'm really excited for this project. I think it's going to be a lot of fun and result in a pretty cool board.

The only hitch is that the PCB isn't an exact fit in the case so I'm going to have to trim it down. I don't have any experience doing this so I'm open to tips!

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Last edited by snacksthecat on 06 Jul 2018, 03:51, edited 1 time in total.
snacksthecat
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Unread post24 Jun 2018, 23:32

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B-but but but... Who would slaughter a DC-3014? D: It's even ANSI!
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Unread post25 Jun 2018, 06:57

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the PCB was dead, IRCC.
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Unread post25 Jun 2018, 07:00

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The DC-3014's PCB was shot, and so the 2214, which had whites, was used as a replacement for the DC-3014's. Not mine, but mike's.

So snacks has the former PCB that didn't work. May you have luck in bringing that one back from the dead, man.
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Unread post25 Jun 2018, 07:01

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Man that PCB is nasty! Re solder all them ICs and passives with good old lead solder and get the mofo in the ultrasonic.
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Unread post25 Jun 2018, 10:22

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The patient has been cleaned and prepped for surgery.

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Unread post01 Jul 2018, 00:39

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Chyros wrote:B-but but but... Who would slaughter a DC-3014? D: It's even ANSI!

pcb was toast, I replaced it with a 2214 pcb.
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Unread post01 Jul 2018, 00:43

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I ain't no surgeon

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Unread post01 Jul 2018, 01:02

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Well it's certainly not like mapping the human genome but I'm still proud. Happy to report that the matrix is all good and he's going to make a full recovery.

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Unread post01 Jul 2018, 02:08

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Unread post05 Jul 2018, 22:12

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Currently working through figuring out the matrix.

Image

In the past I've tried tracing it out on the computer and I've also tried tracing it out using a multimeter. This time I wanted to speed it up so I wrote this little arduino sketch to help. Works great and I've learned something new! Even found a dead switch that needs replacing.

Code: Select all
byte cols[] = {0,1,2,3,4,5,6,7};
const int colCount = sizeof(cols)/sizeof(cols[0]);

byte rows[] = {8,9,10,11,12,13,14,15,16,17,18,19,20};
const int rowCount = sizeof(rows)/sizeof(rows[0]);
 
void setup() {
  for (int x=0; x<colCount; x++) {
    pinMode(cols[x], INPUT_PULLUP);
  }
 
  for(int x=0; x<rowCount; x++) {
      pinMode(rows[x], INPUT);
  }
  Serial.begin(115200); 
}

void loop() {
  // Iterate rows
  for (int rowIndex=0; rowIndex < rowCount; rowIndex++) {
 
   
    // Current row
    byte curRow = rows[rowIndex];
    pinMode(curRow, OUTPUT);
    digitalWrite(curRow, LOW);

    // Iterate columns
    for (int colIndex=0; colIndex < colCount; colIndex++) {
     
      // Current col
      byte curCol = cols[colIndex];
      if(digitalRead(curCol) == LOW) {
       
        // Hit!
        Serial.print("Row: ");
        Serial.print(rowIndex);
        Serial.print(" | Col: ");
        Serial.println(colIndex);
      }
     
    }
    pinMode(curRow, INPUT);
  }
}
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Unread post07 Jul 2018, 15:11

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Not at all good with circuits. Is there any way I can light these LEDs using power from the teensy? I should have paid attention in science class :cry:

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Unread post07 Jul 2018, 17:03

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Just got it working. The trick (for anyone who might be having the same problem) is to do the following:
  1. obtain a resistor of the same resistance as is indicated on the printed circuit board
  2. solder the resistor into place on the printed circuit board
  3. that's it

I know it sounds tricky but if I can do it, anyone can.

:lol: but really the problem I was having was that I was trying to test the LED with a simple sketch but I didn't set the pin mode to output (duhhhh)
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Unread post07 Jul 2018, 23:59

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All wired up!

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Unread post09 Jul 2018, 03:42

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And here we hit a snag!

I really like these sculpted typewriter caps for the alphas so I'm doing my best to match them. Unfortunately my capslock key stem is just a little bit off. Wondering if I should try more surgery or hunt down one that fits?

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Actually I do have one that fits (from a dell) but it would look really bad next to the other caps.

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Unread post13 Jul 2018, 01:48

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snacksthecat wrote:All wired up!

Image

Wire confetti!!!!

oof - that caps lock. Did the sphericals come with a different key you could use there?
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Unread post13 Jul 2018, 02:55

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unfortunately not

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Unread post13 Jul 2018, 03:19

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I have an AT101 caps lock that doesn't fit on the omnikey I just built. Want me to send it to you?

edit: or a video writer caps lock would work as well!
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Unread post13 Jul 2018, 03:23

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//gainsborough wrote:I have an AT101 caps lock that doesn't fit on the omnikey I just built. Want me to send it to you?

edit: or a video writer caps lock would work as well!

I'm currently gluing one so I think I'm okay but thanks for the offer.

By the way, I did this as a joke but I actually think it looks awesome :lol:

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Unread post13 Jul 2018, 04:16

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I dig it!
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Unread post13 Jul 2018, 04:33

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Very quirky. I love it. Good job, snacks.
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Unread post13 Jul 2018, 15:38

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Nice job. The caps fit the board..a little bit of everything. Which typewriter did the alphas come from?
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Unread post13 Jul 2018, 16:38

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I'm happy to report another successful operation.

Basically I used an xacto knife to cut some notches into the very base of the stem then just used my thumb to pop it off. Next I used some of this JB Weld epoxy to glue it back in my desired spot. I'm pretty happy with the fit.

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Unread post14 Jul 2018, 19:47

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Engicoder wrote:Nice job. The caps fit the board..a little bit of everything. Which typewriter did the alphas come from?

I'm not actually sure, I'll check with the guy I bought them off of.
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Unread post14 Jul 2018, 19:48

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