DFRobot
Gravity: Digital I2C Signal Isolator
Gravity: Digital Signal Isolator is capable of isolating I2C digital signal and providing isolated power to the sensor module, effectively preventing mutual ...
Gravity: Digital Signal Isolator is capable of isolating I2C digital signal and providing isolated power to the sensor module, effectively preventing mutual interference between the sensor modules. This digital signal isolator can be used for multi-parameter water quality detection systems to prevent water quality sensors from interfering with each other.
In many cases, interference sources are existing. For example, a running pump in a fish tank will release signals into the water, which interferes the sensors in the fish tank. In this case, electrical isolation is needed to ensure the stable operation of the sensors. Some sensors, such as pH sensors and electrical conductivity sensors, which share the same power source and measure in the same container, will interfere with each other and do not work properly. In order to ensure stable operation of the sensor modules, it is necessary to isolate the signal and the power.
After the analog signal isolator, we launched this digital signal isolator which specifically isolates the I2C digital signal. What's more, the on-board 5V isolation power chip can directly supply the sensor module, without additional power. This product is designed specifically for DFRobot I2C connector sensor or modules, plug and play, no welding. Connect it into your circuit to get electrical isolation, and the code of sensor module in control board does not need to be modified, which is simple and convenient.
1. Please pay attention to the operating current of your sensor or module, the maximum output current from Module side is 150mA.
2. All pins on the Module side (isolation side) are isolated from all pins on the Controller side (non-isolation side). Do not short-circuit them.
3. It is normal for the isolator generates heat while working.
FEATURES
- Onboard 5V 0.75W isolation power chip, no additional power needed, simple and convenient
- Almost compatible with all DFRobot I2C connector sensors or modules, plug and play, no welding
SPECIFICATION
- Operating Voltage: 5.0V
- Connector Type: PH2.0-4P
- Interface Protocol: I2C(IIC)
- Interface Signal Level: High 3.3V, Low 0V
- Dimension: 42 * 32mm / 1.65 * 1.26 inch
Controller Side（Non-isolation Side)
- Supply Voltage: 5.0 ± 0.15V
- No-load Current: 15mA(TYP)
Module Side(Isolation Side)
- Output Voltage: 5.0 ± 0.15V
- Output Current: 150mA(MAX)
DOCUMENTS
SHIPPING LIST
- Gravity: Digital I2C Signal Isolator x1
- Double PH2.0-4P Cable x1
- Gravity-4P I2C/ UART Sensor Cable x1
- XH2.54-4Pin Header x2
Jargon buster
Plain-language definitions for the technical terms used above.
- Analog signal isolator
- A circuit module that passes an analog reading while electrically separating the sensor side from the microcontroller side. This can matter in water monitoring because probes in the same liquid can interfere with each other or create ground-loop errors.
- Gravity
- Gravity is DFRobot’s plug-in connector system for sensors, motors and modules, using standard cables to reduce loose jumper wiring. It matters because Gravity-compatible parts can connect directly to these ports, while non-Gravity parts may need adapters or manual wiring.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- pH
- A measure of how acidic or alkaline a liquid is, on a scale where 7 is neutral. For a water monitoring kit, pH tells you about water chemistry and whether the included probe matches the range and accuracy your project needs.
- UART
- UART is a simple serial connection that sends data over separate transmit and receive wires, often labelled TX and RX. It matters because this module is designed to replace a wired UART cable with a wireless link while keeping the same serial data format.
Find this product in
Brands
Supplier page — dfrobot.com
Supplier Description · 657.7 KB · Click any page to view full size
Related Tutorials
Free guides on learn.littlebird.com.au
