2-digit 0.56 inch 7 segment

diylc/diylc-core/src/main/resources/import-defaults/variants.xml

@@ -5088,6 +5088,24 @@
           <defaultFlag>false</defaultFlag>
           <createdOn>2026-10-11T00:00:00.0000000</createdOn>
         </org.diylc.core.Template>
+        <org.diylc.core.Template>
+          <name>2-Digit 0.56" Common Cathode</name>
+          <values>
+            <entry><string>Type</string><diylc.displays.SevenSegmentDisplay_-DisplayType>TwoDigit_0_56_10Pin</diylc.displays.SevenSegmentDisplay_-DisplayType></entry>
+            <entry><string>Common</string><diylc.displays.SevenSegmentDisplay_-Common>Cathode</diylc.displays.SevenSegmentDisplay_-Common></entry>
+          </values>
+          <defaultFlag>false</defaultFlag>
+          <createdOn>2026-10-11T00:00:00.0000000</createdOn>
+        </org.diylc.core.Template>
+        <org.diylc.core.Template>
+          <name>2-Digit 0.56" Common Anode</name>
+          <values>
+            <entry><string>Type</string><diylc.displays.SevenSegmentDisplay_-DisplayType>TwoDigit_0_56_10Pin</diylc.displays.SevenSegmentDisplay_-DisplayType></entry>
+            <entry><string>Common</string><diylc.displays.SevenSegmentDisplay_-Common>Anode</diylc.displays.SevenSegmentDisplay_-Common></entry>
+          </values>
+          <defaultFlag>false</defaultFlag>
+          <createdOn>2026-10-11T00:00:00.0000000</createdOn>
+        </org.diylc.core.Template>
         <org.diylc.core.Template>
           <name>4-Digit 0.36" Common Cathode</name>
           <values>

diylc/diylc-core/src/main/resources/update.xml

@@ -507,7 +507,7 @@
 			<changes>
 				<org.diylc.appframework.update.Change>
 					<changeType>NEW_FEATURE</changeType>
-					<description>7-Segment Display - 1-digit 0.56 inch, 4-digit in 0.36 inch and 0.56 inch, and TM1637 driver module</description>
+					<description>7-Segment Display - 1-digit 0.56 inch, 2-digit 0.56 inch, 4-digit in 0.36 inch and 0.56 inch, and TM1637 driver module</description>
 				</org.diylc.appframework.update.Change>
 				<org.diylc.appframework.update.Change>
 					<changeType>NEW_FEATURE</changeType>

diylc/diylc-library/src/main/java/org/diylc/components/displays/SevenSegmentDisplay.java

@@ -52,7 +52,7 @@ import org.diylc.core.measures.SizeUnit;
 import org.diylc.utils.Constants;
 
 @ComponentDescriptor(name = "7-Segment Display", category = "Displays & Outputs",
-    author = "Branislav Stojkovic", description = "7-Segment LED Display (1-Digit, 4-Digit, or TM1637 I2C Driver Module)",
+    author = "Branislav Stojkovic", description = "7-Segment LED Display (1-Digit, 2-Digit, 4-Digit, or TM1637 I2C Driver Module)",
     instanceNamePrefix = "DISP", zOrder = IDIYComponent.COMPONENT,
     bomPolicy = BomPolicy.SHOW_ONLY_TYPE_NAME, keywordPolicy = KeywordPolicy.SHOW_TYPE_NAME,
     enableCache = true)
@@ -96,6 +96,15 @@ public class SevenSegmentDisplay extends AbstractMakerBoard {
       "E", "D", "COM1", "C", "DP", "B", "A", "COM2", "F", "G"
   };
 
+  /**
+   * The 5621AS, which is the two-digit member of the same 0.56 inch family as the 5641AS. Ten pins
+   * rather than twelve: there are two digit commons to bring out instead of four, and no pin is
+   * freed up by that because the segments already account for the rest.
+   */
+  public static final String[] PIN_NAMES_2DIGIT = new String[] {
+      "E", "D", "DP", "C", "G", "B", "D2", "D1", "F", "A"
+  };
+
   /**
    * Shared by both bare four-digit packages: the 3641AS and the 5641AS differ in size but not in
    * pin function, confirmed by the maintainer.
@@ -591,11 +600,13 @@ public class SevenSegmentDisplay extends AbstractMakerBoard {
    * until someone reads a datasheet or measures a part.
    */
   public enum DisplayType {
-    // The parts these model: 5161AS for the single digit, 3641AS for the 0.36 inch four-digit
-    // package and 5641AS for the 0.56 inch one. The two four-digit parts differ in size but share
-    // a pinout, which is why one array serves both.
+    // The parts these model: 5161AS for the single digit, 5621AS for the two-digit package, 3641AS
+    // for the 0.36 inch four-digit package and 5641AS for the 0.56 inch one. The two four-digit
+    // parts differ in size but share a pinout, which is why one array serves both.
     SingleDigit_10Pin("1-Digit 0.56\"", 12.7d, 19.0d, 8.1d, 14.2d, 0d, 15.24d, true, 1,
         PIN_NAMES_1DIGIT, null),
+    TwoDigit_0_56_10Pin("2-Digit 0.56\"", 25.0d, 19.0d, 8.1d, 14.2d, 12.7d, 15.24d, true, 2,
+        PIN_NAMES_2DIGIT, null),
     FourDigit_0_36_12Pin("4-Digit 0.36\"", 30.0d, 14.0d, 5.2d, 9.14d, 7.5d, 10.16d, true, 4,
         PIN_NAMES_4DIGIT, null),
     FourDigit_0_56_12Pin("4-Digit 0.56\"", 50.3d, 19.0d, 8.1d, 14.2d, 12.7d, 15.24d, true, 4,

diylc/diylc-library/src/test/java/org/diylc/components/displays/SevenSegmentDisplayTest.java

@@ -35,8 +35,8 @@ import org.junit.BeforeClass;
 import org.junit.Test;
 
 /**
- * Basic checks for the seven-segment displays. Three of the four variants are DIP packages that
- * straddle their pins with a row either side, and the fourth is a module carrying a single header
+ * Basic checks for the seven-segment displays. All but one of the variants are DIP packages that
+ * straddle their pins with a row either side, and the last is a module carrying a single header
  * down one edge, so the pin layout is what differs most between them.
  */
 public class SevenSegmentDisplayTest {
@@ -75,6 +75,7 @@ public class SevenSegmentDisplayTest {
   @Test
   public void pinCountFollowsThePackage() {
     Assert.assertEquals(10, of(DisplayType.SingleDigit_10Pin).getControlPointCount());
+    Assert.assertEquals(10, of(DisplayType.TwoDigit_0_56_10Pin).getControlPointCount());
     Assert.assertEquals(12, of(DisplayType.FourDigit_0_36_12Pin).getControlPointCount());
     Assert.assertEquals(12, of(DisplayType.FourDigit_0_56_12Pin).getControlPointCount());
     Assert.assertEquals(4, of(DisplayType.TM1637_Module_4Pin).getControlPointCount());
@@ -87,6 +88,8 @@ public class SevenSegmentDisplayTest {
   public void pinNamesAreInDipOrder() {
     Assert.assertArrayEquals(new String[] {"E", "D", "COM1", "C", "DP", "B", "A", "COM2", "F", "G"},
         SevenSegmentDisplay.PIN_NAMES_1DIGIT);
+    Assert.assertArrayEquals(new String[] {"E", "D", "DP", "C", "G", "B", "D2", "D1", "F", "A"},
+        SevenSegmentDisplay.PIN_NAMES_2DIGIT);
     Assert.assertArrayEquals(
         new String[] {"E", "D", "DP", "C", "G", "D4", "B", "D3", "D2", "F", "A", "D1"},
         SevenSegmentDisplay.PIN_NAMES_4DIGIT);
@@ -127,6 +130,7 @@ public class SevenSegmentDisplayTest {
   @Test
   public void digitCountComesFromThePackage() {
     Assert.assertEquals(1, DisplayType.SingleDigit_10Pin.getDigitCount());
+    Assert.assertEquals(2, DisplayType.TwoDigit_0_56_10Pin.getDigitCount());
     Assert.assertEquals(4, DisplayType.FourDigit_0_36_12Pin.getDigitCount());
     Assert.assertEquals(4, DisplayType.FourDigit_0_56_12Pin.getDigitCount());
     Assert.assertEquals(4, DisplayType.TM1637_Module_4Pin.getDigitCount());
@@ -141,8 +145,8 @@ public class SevenSegmentDisplayTest {
   /**
    * A driven module brings out no common pins, so its polarity is not something you order -- which
    * is why the BOM line omits it. Asked of the variant rather than of its identity, and paired with
-   * the pin arrangement so that the two cannot quietly become one question: they agree on all four
-   * variants today, but a single-in-line bare package or a module in a DIP outline would separate
+   * the pin arrangement so that the two cannot quietly become one question: they agree on every
+   * variant today, but a single-in-line bare package or a module in a DIP outline would separate
    * them.
    */
   @Test