> **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 I/O Expansion Shield for OpenMV Cam M7 **Type:** Product page · **SKU:** DFR0578 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia) **Page:** https://core-electronics.com.au/gravity-i-o-expansion-shield-for-openmv-cam-m7.html ([markdown](https://core-electronics.com.au/gravity-i-o-expansion-shield-for-openmv-cam-m7.html.md)) Gravity: I/O Expansion Shield for OpenMV Cam M7 is an expansion shield specially designed for the OpenMV Cam M7. It is compatible with various sensors and electronic... ## Pricing - **Price:** $8.55 (inc GST) — $7.77 AUD, exc GST - **Quantity discounts:** 6+ $7.38 (exc GST) · 12+ $7.07 (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=DFR0578:1` (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/DFR0578:1.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 Gravity: I/O Expansion Shield for OpenMV Cam M7 is an expansion shield specially designed for the [OpenMV Cam M7](https://www.dfrobot.com/product-1648.html). It is compatible with various [sensors](https://www.dfrobot.com/category-36.html) and electronic [modules](https://www.dfrobot.com/category-156.html) of [Gravity series](https://www.dfrobot.com/gravity), plug and play, no soldering required. It not only helps you avoid the complex wiring , welding and other operations, but also helps you quickly complete wiring and get started with the sensors or electronic modules, to build [prototypes](https://www.dfrobot.com/category-67.html) faster. This expansion shield is equipped with a 5V USB external [power supply](https://www.dfrobot.com/category-70.html) port and a 3.3V/VIN power switch, which makes the expansion shield able to drive high current components such as [motors and servos](https://www.dfrobot.com/category-51.html). There are 9 sets of digital ports, 1 set of analog port, 1 set of serial port and 2 sets of I2C ports on the expansion shield. Additional, there is an onboard 3.3V LDO, which meets the power demand of multiple modules at the same time. Attention: 1. The USB port of the expansion shield is only used for power supply, so it cannot be used for programming or debugging. The continuous current of the USB port is recommended to be controlled within 1A. 2. When put the expansion shield on the OpenMV motherboard, please pay attention to the direction. The USB port of the expansion shield should be on the same side as the USB port of the OpenMV motherboard. 3. Because OpenMV motherboard works at 3.3V, limited by the voltage, it does not support 5V analog input. All signal pins are 0~3.3V. 4. If you need to drive high current components such as servos and motors, please connect them to P7~P9 ports, then connect the external power supply, and turn the power switch to VIN side. Otherwise, the OpenMV motherboard may be damaged due to high current. 5. The power supply of P7,P8,P9 port can be selected 3.3V or VIN by the power switch. The power supply voltage of the remaining ports are all 3.3V. ![Gravity: I/O Expansion Shield for OpenMV Cam M7 Connection With Servo](https://core-electronics.com.au/attachments/localcontent/DFR0578-Connection_7687572367f.jpg)### Features 1. Onboard 5V external power port and 3.3V/VIN power switch, which makes the expansion shield able to drive high current components such as motors and servos 2. Color-coded Gravity connector, compatible with various sensors or modules of Gravity series, plug and play, no soldering required 3. 9 sets of digital ports, 1 set of analog port, 1 set of serial port, 2 sets of I2C ports ### Specification - External Power Supply Voltage (onboard USB port): 5.0±0.1V - External Power Input Current (onboard USB port): <1A - Connector: Gravity series standard connector - Ports: 9 sets of digital ports, 1 set of analog port, 1 set of serial port, 2 sets of I2C ports - Interface Signal Level: High Level 3.3V, Low Level 0V - Analog Input Range: 0~3.3V - Onboard LDO Output Voltage: 3.3V - Onboard LDO Output Current: <500mA - Board Size: 35.6mm\*24.8mm **Documents** 9. [Product wiki](https://www.dfrobot.com/wiki/index.php/Gravity:_I/O_Expansion_Shield_for_OpenMV_Cam_M7_SKU:DFR0578) 10. [More Documents](https://www.dfrobot.com/wiki/index.php/Gravity:_I/O_Expansion_Shield_for_OpenMV_Cam_M7_SKU:DFR0578#More_Documents) ### Parts List - Gravity: I/O Expansion Shield for OpenMV Cam M7 x1 ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/d/f/dfr0578-900x600.jpg)