> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt # Gravity: Digital I2C Signal Isolator **Type:** Product page · **SKU:** DFR0565 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia) **Page:** https://core-electronics.com.au/gravity-digital-i2c-signal-isolator.html ([markdown](https://core-electronics.com.au/gravity-digital-i2c-signal-isolator.html.md)) Gravity: Digital Signal Isolator is capable of isolating I2C digital signal and providing isolated power to the sensor module, effectively preventing mutual interference... ## Pricing - **Price:** $27.70 (inc GST) — $25.18 AUD, exc GST - **Quantity discounts:** 6+ $23.93 (exc GST) · 12+ $22.92 (exc GST) ## Availability & dispatch - Available with a lead time — expect dispatch between Aug 19 and Aug 24. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=DFR0565:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart. - **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/DFR0565:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.) - **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there. - **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works) - **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt ## Description **Introduction** 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](https://www.dfrobot.com/category-68.html) 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](https://www.dfrobot.com/search-ph%20sensor.html) and [electrical conductivity sensors](https://www.dfrobot.com/product-1123.html), 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. ![](https://core-electronics.com.au/attachments/localcontent/DFR0565-Connection_19576ddb112.png) Note: 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** 1. Onboard 5V 0.75W isolation power chip, no additional power needed, simple and convenient 2. 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** 15. [Product wiki](https://www.dfrobot.com/wiki/index.php/Gravity:_Digital_Signal_Isolator_SKU:_DFR0565) 16. [More Documents](https://www.dfrobot.com/wiki/index.php/Gravity:_Digital_Signal_Isolator_SKU:_DFR0565#More_Documents) **Parts 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 ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/d/f/dfr0565-900x600.jpg)