user80232: How to light up the two points that is in the middle? It only lights up when the digB is set to LOW, and it lights up all 3 points that is in the middle.

Example code:
const int displayPins[] = {2,3,4,5,6,7,8,9,10,11,12,13};
const int digA = 7;
const int digB = 4;
const int digC = 3;
const int digD = 8;
const int decimalPoint = 10;

void setup() {
    for (int i = 0; i < (sizeof(displayPins)/sizeof(displayPins[0])); i++) {
        pinMode(displayPins[i], OUTPUT);
    }

    digitalWrite(digA, 1);
    digitalWrite(digB, 0);
    digitalWrite(decimalPoint, 1);
    digitalWrite(digC, 1);
    digitalWrite(digD, 1);
}

void loop() {
}

I want to display a clock in this format: 00:00. But did not found a way to light up the two points that is in the middle.

user4143: It is not possible to separate the colon dots from the decimal point dot - they are all wired together in parallel internally:

As has been mentioned in the comments you need to use the "black tape" method of selecting the LEDs. That's not a joke, that's really what's done. Cover the LED that you don't want visible with black tape (or black paint, etc).

80232: <p>How to light up the two points that is in the middle? It only lights up when the <code>digB</code> is set to <code>LOW</code>, and it lights up all 3 points that is in the middle.</p>
<p><a href="https://i.stack.imgur.com/jp6tK.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/jp6tK.jpg" alt="Item" /></a></p>
<p>Example code:</p>
<pre><code>const int displayPins[] = {2,3,4,5,6,7,8,9,10,11,12,13};
const int digA = 7;
const int digB = 4;
const int digC = 3;
const int digD = 8;
const int decimalPoint = 10;

void setup() {
    for (int i = 0; i &lt; (sizeof(displayPins)/sizeof(displayPins[0])); i++) {
        pinMode(displayPins[i], OUTPUT);
    }

    digitalWrite(digA, 1);
    digitalWrite(digB, 0);
    digitalWrite(decimalPoint, 1);
    digitalWrite(digC, 1);
    digitalWrite(digD, 1);
}

void loop() {
}
</code></pre>
<p>I want to display a clock in this format: 00:00. But did not found a way to light up the two points that is in the middle.</p>
 4143: <p>It is not possible to separate the colon dots from the decimal point dot - they are all wired together in parallel internally:</p>
<p><a href="https://i.stack.imgur.com/45ubQ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/45ubQ.png" alt="enter image description here" /></a></p>
<p>As has been mentioned in the comments you need to use the &quot;black tape&quot; method of selecting the LEDs. That's not a joke, that's really what's done. Cover the LED that you don't want visible with black tape (or black paint, etc).</p>
