docs: add COEX PDB page (en/ru)

docs/en/SUMMARY.md

@@ -54,6 +54,7 @@
   * [MAVROS](mavros.md)
 * [Supplementary materials](supplementary.md)
   * [COEX Pix](coex_pix.md)
+  * [COEX Pix](coex_pdb.md)
   * [Guide on autonomous flight](auto_setup.md)
   * [Hostname](hostname.md)
   * [PX4 Simulation](sitl.md)

docs/en/coex_pdb.md

@@ -0,0 +1,13 @@
+# COEX PDB
+
+**COEX PDB** is the power distribution board used in [Clover 4 Drone kit](assemble_4_2.md).
+
+## Port pinouts
+
+### Top
+
+<img src="../assets/coex_pdb/coex-pdb-top.png" width=400 class=zoom>
+
+### Bottom view
+
+<img src="../assets/coex_pdb/coex-pdb-bottom.png" width=400 class=zoom>

docs/ru/SUMMARY.md

@@ -54,6 +54,7 @@
   * [MAVROS](mavros.md)
 * [Дополнительные материалы](supplementary.md)
   * [COEX Pix](coex_pix.md)
+  * [COEX PDB](coex_pdb.md)
   * [Гид по автономному полету](auto_setup.md)
   * [Имя хоста](hostname.md)
   * [Симулятор](sitl.md)

docs/ru/coex_pdb.md

@@ -0,0 +1,13 @@
+# COEX PDB
+
+**COEX PDB** (Power Distribution Board) – плата распределения питания для квадрокоптеров [Клевер 4](assemble_4_2.md).
+
+## Схемы расположения контактов
+
+### Вид сверху
+
+<img src="../assets/coex_pdb/coex-pdb-top.png" width=400 class=zoom>
+
+### Вид снизу
+
+<img src="../assets/coex_pdb/coex-pdb-bottom.png" width=400 class=zoom>