# Pinout
### PWM
10 pin JST-GH
| Pin | Signal | Voltage |
| --- | ------------- | ------------- |
| 1 | VDD\_SERVO\_1 | VDD\_SERVO\_1 |
| 2 | CH0\_EXT | +3.3V |
| 3 | CH1\_EXT | +3.3V |
| 4 | CH2\_EXT | +3.3V |
| 5 | CH3\_EXT | +3.3V |
| 6 | CH4\_EXT | +3.3V |
| 7 | CH5\_EXT | +3.3V |
| 8 | CH6\_EXT | +3.3V |
| 9 | CH7\_EXT | +3.3V |
| 10 | GND | GND |
### PWM
10 pin JST-GH
| Pin | Signal | Voltage |
| --- | ------------- | ------------- |
| 1 | VDD\_SERVO\_2 | VDD\_SERVO\_2 |
| 2 | CH8\_EXT | +3.3V |
| 3 | CH9\_EXT | +3.3V |
| 4 | CH10\_EXT | +3.3V |
| 5 | CH11\_EXT | +3.3V |
| 6 | CH12\_EXT | +3.3V |
| 7 | CH13\_EXT | +3.3V |
| 8 | CH14\_EXT | +3.3V |
| 9 | CH15\_EXT | +3.3V |
| 10 | GND | GND |
### I2C
4 pin JST-GH
| Pin | Signal | Voltage |
| --- | -------- | ------- |
| 1 | 5V\_IN | +5.0V |
| 2 | I2C\_SCL | +3.3V |
| 3 | I2C\_SDA | +3.3V |
| 4 | GND | GND |
### Resistor Settings
VDD\_SERVO\_1 and VDD\_SERVO\_2 can be connected together by shorting the pads of the large unpopulated resistor. Either with solder or a 0 Ohm 0805 resistor.
The I2C address can be changed by moving the resistors from the left position to the right position to change the bit from 0 to 1.
---
# Agent Instructions: Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter:
```
GET https://docs.arkelectron.com/products/accessories/ark-servo-expander/pinout.md?ask=
```
The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.