Gravity: I2C GP8413 2-Channel 0-5V/0-10V DAC Module (DFR0971)

# Gravity: I2C GP8413 2-Channel 0-5V/0-10V DAC Module (DFR0971)

The **DFRobot Gravity: DFR0971** is an industrial-grade, 2-channel digital-to-analog converter (DAC) module that converts I2C digital commands into highly stable, linear analog voltage outputs. Driven by the advanced GP8413 chip, this module features a hardware-selectable output range of **0 to 5V** or **0 to 10V**, making it directly compatible with professional industrial hardware, variable frequency drives (VFDs), servo controllers, and dimming packs.

Whether you are automating a workshop, building custom PLC interfaces, or engineering precise motor speed controls, the DFR0971 offers a reliable, high-resolution solution to bridge the gap between digital microcontrollers and analog machinery.

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## Key Features

### 🎛️ Dual-Channel Independent Output

The module provides two fully independent analog output channels. You can drive a VFD motor speed controller on channel one while simultaneously modulating an industrial LED lighting ballast on channel two, all from a single breakout board.

### ⚡ Industrial 10V Range Selection

Standard microcontrollers are locked to 3.3V or 5V logic. The DFR0971 utilizes an integrated onboard charge pump and signal conditioning circuitry to accurately scale and output up to a full **0 to 10V range**. The output voltage range can be easily toggled via a physical onboard switch or configured via software.

### 🛡️ Built-In Short-Circuit & Rugged Protection

Designed for harsh operating environments, the module includes comprehensive output short-circuit protection. If a wiring mistake or an downstream component failure occurs, the onboard circuitry limits the output current to safeguard both the DAC chip and your main microcontroller.

### 🔌 Easy I2C Addressing & Cascading

The module utilizes a clean, 2-wire I2C interface compatible with 3.3V and 5V controllers. It also features configurable hardware I2C address pins, allowing you to cascade up to 8 modules on a single I2C bus to manage up to 16 independent analog channels simultaneously.

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## Technical Specifications

| Parameter | Specification |
| — | — |
| **DAC Chip** | GP8413 |
| **Output Channels** | 2 Independent Channels |
| **Output Voltage Ranges** | 0 to 5V DC or 0 to 10V DC |
| **Resolution** | 15-bit (High-precision signal output) |
| **Supply Voltage** | 3.3V to 5.0V DC |
| **Communication Interface** | Gravity I2C (Standard Speed up to 400kHz) |
| **Output Error** | Less than 0.5% (Typical) |
| **Short-Circuit Protection** | Integrated current-limiting safety |
| **I2C Addresses** | 0x58, 0x59, 0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F (Configurable) |
| **Dimensions** | 32 mm $\times$ 32 mm |

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## Applications

* **Industrial Automation & PLC Interfacing:** Bridge low-power microcontrollers (Arduino, ESP32, Raspberry Pi) to standard 0-10V PLC analog input cards.
* **Motor Speed Control:** Interface directly with Variable Frequency Drives (VFDs) and electronic speed controllers to automate spindle, conveyor, or pump speeds.
* **Advanced Lighting Systems:** Provide clean, analog control signals for commercial 0-10V dimmable LED drivers and architectural lighting systems.
* **Valve & Actuator Positioning:** Send precise positioning voltages to proportional analog valves and pneumatic regulators.

> **What’s In The Box:**
> * 1 Gravity: I2C 2-Channel 0-5V/0-10V DAC Module (DFR0971)
> * 1 Gravity 4-Pin I2C/UART Sensor Cable
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