> **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 # Multi Function Expansion Board for UNIHIKER M10 / K10 & micro:bit (Power & Motion) **Type:** Product page · **SKU:** DFR1216-1 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia) **Page:** https://core-electronics.com.au/dfrobot-unihiker-m10-k10-microbit-expansion-board-motor-servo-driver-18650-power.html ([markdown](https://core-electronics.com.au/dfrobot-unihiker-m10-k10-microbit-expansion-board-motor-servo-driver-18650-power.html.md)) Supercharge UNIHIKER K10/M10 projects. The all-in-one expansion board adds a motor driver, 18650 power, and extensive IO, solving pin and power... ## Pricing - **Price:** $31.60 (inc GST) — $28.73 AUD, exc GST ## Availability & dispatch - Available with a lead time — expect dispatch between Sep 02 and Sep 07. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=DFR1216-1:1` (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/DFR1216-1:1.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 The Multi-function Expansion Board for UNIHIKER is an all-in-one module engineered to unlock the full potential of **UNIHIKER ([K10](https://core-electronics.com.au/unihiker-k10-ai-educational-tool-for-kids-image-detection-voice-recognition-tinyml.html) / M10) and [micro:bit](https://core-electronics.com.au/micro-bit-australia.html) development boards**. By seamlessly integrating with the host controller, it addresses common limitations through three core enhancements: **comprehensive I/O expansion, a self-contained 18650 mobile power system, and a high-current motor and servo drive unit.** This board enables the simultaneous control of up to 4 DC motors and 6 servos while providing a rich array of digital, analog, and communication ports. It is the definitive solution for developing complex mobile robots, portable interactive devices, and sophisticated maker projects that demand greater connectivity and power autonomy. **Comprehensive I/O Expansion** This expansion board directly resolves the issue of insufficient I/O pins on the UNIHIKER development board. It adds a multitude of multifunctional pins, including 6 ports for digital, analog, or single-bus devices, and a dedicated interface for ultrasonic sensors. Critically, it retains the native gold finger interface of the mainboard, ensuring existing connections remain accessible. Furthermore, the board integrates onboard components such as two programmable RGB LEDs and an infrared transmitter/receiver, adding immediate functionality for status indication and remote control without requiring external modules. ![How to Connect the Expansion board and UNIHIKER M10](https://dfimg.dfrobot.com/enshop/image/data/DFR1216-1/M10-CABLE_0x0.jpg.webp) Figure: How to Connect the Expansion board and UNIHIKER M10 **Integrated Mobile Power Solution** Designed for true project mobility, the IO expansion board eliminates the need for cumbersome external battery packs and tethered power cables. It features an integrated 18650 battery holder with a complete charging and discharging management circuit. An onboard battery level indicator provides a clear visual cue of the power status for safe operation. For the high-performance UNIHIKER M10, a specially designed Type-C to HY2.0-4P power cable is included, ensuring a stable and reliable power supply for demanding applications. **Superior Motor and Servo Driving Capability** To handle complex robotics and automation tasks, the IO expansion board is equipped with a powerful drive system. It incorporates a four-channel DC motor driver and six servo interfaces. The servo power supply is independent, drawing directly from the battery to ensure that high-torque movements do not compromise the main controller's stability. Additionally, a dedicated 5V I2C interface is included to reliably power high-current peripherals, such as the HUSKYLENS AI vision sensor, which typical 3.3V logic boards cannot support alone. ![UNIHIKER expansion board with various connected modules](https://dfimg.dfrobot.com/enshop/image/data/DFR1216-1/unihiker-sensors_0x0.jpg.webp) Figure: UNIHIKER expansion board with various connected modules **Robust, LEGO-Compatible, and User-Friendly Design** Every aspect of the board is designed for practicality and durability. The M3 mounting hole spacing on its base is **compatible with LEGO brick dimensions**, allowing for seamless integration into mechanical structures. A full suite of status indicator lights for system power, charging, and motor direction provides immediate visual feedback for easy debugging. For protection, an acrylic baseplate prevents accidental short circuits, while all I/O pins are equipped with electrostatic protection, enhancing safety during handling and use. Figure: UNIHIKER board mounted on LEGO bricks ### Specification - Operating voltage: 3.3V DC - USB-C interface input voltage: 5V DC - GPIO extension: 3.3V GPIO from main board edge connector x8 3.3V Digital/Analog/OneWire GPIO x6 Servo interface (powered by battery) x6 3.3V I2C x3 5V I2C x1 5V Ultrasonic Sensor (Trig-Echo) x1 - Motor Driver: DC Motor Terminal Block x4 - HY2.0 4-pin interface x1 (power for UNIHIKER M10) - Battery Holder: 3.7V 18650 - On-board components: RGB LED (WS2812) x2 IR emitter x1 IR receiver x1 - Size: 65\*88mm - Weight: 200g ### Documents - [Product wiki](https://wiki.dfrobot.com/_SKU_DFR1216_UNIHIKER_Expansion_Board) ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/D/F/DFR1216-1-1.jpg)