> **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 # 3pi+ 32U4 OLED Robot Kit with 15:1 HPCB Motors (Hyper Edition Kit) **Type:** Product page · **SKU:** POLOLU-4977 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia) **Page:** https://core-electronics.com.au/3pi-32u4-oled-robot-kit-with-15-1-hpcb-motors-hyper-edition-kit.html ([markdown](https://core-electronics.com.au/3pi-32u4-oled-robot-kit-with-15-1-hpcb-motors-hyper-edition-kit.html.md)) The Pololu 3pi+ 32U4 OLED robot is a complete, high-performance mobile platform based on the Arduino-compatible ATmega32U4 MCU, and this kit contains all... ## Pricing - **Price:** $314.95 (inc GST) — $286.32 AUD, exc GST - **Quantity discounts:** 3+ $274.86 (exc GST) · 5+ $266.27 (exc GST) ## Availability & dispatch - Available with a lead time — expect dispatch between Sep 01 and Sep 04. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=POLOLU-4977:1` (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/POLOLU-4977:1.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 3pi+ 32U4 OLED is a versatile, high-performance, user-programmable robot that measures just 9.7 cm (3.8") in diameter. At its heart is an ATmega32U4 AVR microcontroller from Microchip (formerly Atmel), and like Pololu's [A-Star 32U4 programmable controllers](https://core-electronics.com.au/search/?q=a+star+controller), the 3pi+ 32U4 features a USB interface and ships preloaded with an Arduino-compatible bootloader, so all you need to program it is a [USB A to Micro-B cable](https://core-electronics.com.au/thin-2mm-usb-cable-a-to-micro-b-6-ft-low-full-speed-only.html) (not included). A software add-on is available that makes it easy to program the robot from the Arduino environment, and Pololu have Arduino libraries and example sketches to help get you started. For advanced users who want to customize or enhance their robots with additional peripherals, the robot’s power rails, power system controls, and microcontroller’s I/O lines can be accessed via several 0.1"-pitch expansion ports. | \| [![](https://core-electronics.com.au/attachments/localcontent/0J11330_3706c43629.jpg)](https://core-electronics.com.au/attachments/localcontent/0J11330_121804f24c8.jpg) \| \|---\| \| 3pi+ 32U4 OLED Robot, front view. \| | \| [![](https://core-electronics.com.au/attachments/localcontent/0J11331_55961997a8.jpg)](https://core-electronics.com.au/attachments/localcontent/0J11331_15733ac5b87.jpg) \| \|---\|---\| \| 3pi+ 32U4 OLED Robot, side view. \| | \| [![](https://core-electronics.com.au/attachments/localcontent/0J11332_4055d2af41.jpg)](https://core-electronics.com.au/attachments/localcontent/0J11332_1433838c552.jpg) \| \|---\|---\| \| 3pi+ 32U4 OLED Robot, rear view. \| | |---| The 3pi+ (or 3??+) features two H-bridge motor drivers and a variety of integrated sensors, including a pair of quadrature encoders for closed-loop motor control, a complete inertial measurement unit (3-axis accelerometer, gyro, and magnetometer), five downward-facing reflectance sensors for line-following or edge-detection, and left and right bump sensors along the front face of the robot. Three on-board pushbuttons offer a convenient interface for user input, and a 128×64 graphical OLED display, buzzer, and indicator LEDs allow the robot to provide feedback. | [![](https://core-electronics.com.au/attachments/localcontent/0J11328_148321a7c72.jpg)](https://core-electronics.com.au/attachments/localcontent/0J11328_6759109898e.jpg) | |---| | [![](https://core-electronics.com.au/attachments/localcontent/0J11329_89336c051d6.jpg)](https://core-electronics.com.au/attachments/localcontent/0J11329_408910b0c07.jpg) | |---| The robot also features a unique power system that runs the motors at a constant 8 V independent of the battery charge level, so the speed of the motors does not vary with the battery voltage. The 3pi+ 32U4 OLED robot is available as a kit or fully assembled with three different motor options: | 3pi+ 32U4 OLED Version | Products | Micro Metal Gearmotor | Top Speed | Comments | |---|---|---|---|---| | Standard Edition | [assembled](https://core-electronics.com.au/3pi-32u4-oled-robot-standard-edition-30-1-mp-motors-assembled.html) or [kit](https://core-electronics.com.au/3pi-32u4-oled-robot-kit-with-30-1-mp-motors-standard-edition-kit.html) | [30:1 MP 6V](https://core-electronics.com.au/30-1-micro-metal-gearmotor-mp-6v-with-extended-motor-shaft.html) | 1.5 m/s | good combination of speed and controllability | | Turtle Edition | [assembled](https://core-electronics.com.au/3pi-32u4-oled-robot-turtle-edition-75-1-lp-motors-assembled.html) or [kit](https://core-electronics.com.au/3pi-32u4-oled-robot-kit-with-75-1-lp-motors-turtle-edition-kit.html) | [75:1 LP 6V](https://core-electronics.com.au/75-1-micro-metal-gearmotor-lp-6v-with-extended-motor-shaft.html) | 0.4 m/s | longest battery life, easiest to control, good for swarm robots or introductory robotics courses | | Hyper Edition | [assembled](https://core-electronics.com.au/3pi-32u4-oled-robot-hyper-edition-15-1-hpcb-motors-assembled.html) or [kit](https://core-electronics.com.au/3pi-32u4-oled-robot-kit-with-15-1-hpcb-motors-hyper-edition-kit.html) | [15:1 HPCB 6V](https://core-electronics.com.au/15-1-micro-metal-gearmotor-hpcb-6v-with-extended-motor-shaft.html) | ~4 m/s | **very fast and difficult to control, easy to damage**; only recommended for advanced users | For those who would prefer to use [different motors](https://core-electronics.com.au/category/141/micro-metal-gearmotors-with-extended-motor-shafts) than these versions above, the [3pi+ chassis](https://core-electronics.com.au/3pi-chassis-kit-no-motors-or-electronics.html) and [3pi+ 32U4 OLED control board](https://core-electronics.com.au/3pi-32u4-oled-control-board.html) are available separately and can be combined with a pair of motors to make a custom kit. **What else you will need** - four [AAA batteries](https://core-electronics.com.au/rechargeable-nimh-aaa-battery-1-2-v-900-mah-1-cell.html): the 3pi+ robot works with both alkaline and NiMH batteries, though Pololu recommend rechargeable NiMH cells - a [USB A to Micro-B cable](https://core-electronics.com.au/thin-2mm-usb-cable-a-to-micro-b-6-ft-low-full-speed-only.html) to connect the robot to your computer for programming and debugging **Assembling the kit version** **Details for item #4977** This product is the **kit version** of the **Hyper Edition** 3pi+ 32U4 OLED Robot. Assembly (including soldering) is required. This version is very difficult to control and fast enough to damage itself from impacts, so it is only recommended for advanced users. **Pololu strongly recommend keeping motor speeds below 50% on this version.** A spare gearbox is included with this edition and instructions for installing it can be found [here](https://www.youtube.com/watch?v=tQbwaJjkHVs). | [![](https://core-electronics.com.au/attachments/localcontent/0J11341_52640144969.jpg)](https://core-electronics.com.au/attachments/localcontent/0J11341_2918666e3e3.jpg) | |---| | 3pi+ 32U4 OLED Robot Kit with 15:1 HPCB Motors (Hyper Edition Kit). | This kit includes: - [3pi+ Chassis Kit](https://core-electronics.com.au/3pi-chassis-kit-no-motors-or-electronics.html) - [3pi+ 32U4 OLED Control Board](https://core-electronics.com.au/3pi-32u4-oled-control-board.html) - two [15:1 HPCB 6V Micro Metal Gearmotors with extended motor shafts](https://core-electronics.com.au/15-1-micro-metal-gearmotor-hpcb-6v-with-extended-motor-shaft.html) - one [graphical OLED display](https://core-electronics.com.au/graphical-oled-display-128x64-1-3-white-spi.html) - one spare 15:1 gearbox This is a newer **3pi+ 32U4 OLED** Robot Kit with a graphical OLED display. For its original version counterpart with an LCD, see the [3pi+ 32U4 Robot Kit with 15:1 HPCB Motors (Hyper Edition Kit)](https://core-electronics.com.au/3pi-32u4-robot-kit-with-15-1-hpcb-motors-hyper-edition-kit.html). **3pi+ 32U4 versions** The original version of the 3pi+ 32U4 includes an [8×2 character LCD](https://core-electronics.com.au/8x2-character-lcd-black-bezel-parallel-interface.html), while this newer **3pi+ 32U4 OLED** incorporates a [graphical OLED display](https://core-electronics.com.au/graphical-oled-display-128x64-1-3-white-spi.html) instead. The name “3pi+ 32U4” can generally be used to refer to both the original (LCD) and OLED versions, and the documentation in Pololu's updated user’s guide covers both versions. Pololu's Arduino library for the 3pi+ 32U4 generally allows code written for the LCD version to work on the OLED version with minimal changes (and the reverse is also true as long as your code does not make use of the OLED’s graphical capabilities). | \| [![](https://core-electronics.com.au/attachments/localcontent/0J11033_30963a9109e.jpg)](https://core-electronics.com.au/attachments/localcontent/0J11033_794879c7937.jpg) \| \|---\| \| 3pi+ 32U4 Robot, top view. \| | \| [![](https://core-electronics.com.au/attachments/localcontent/0J11322_344992dde0e.jpg)](https://core-electronics.com.au/attachments/localcontent/0J11322_878056b614e.jpg) \| \|---\|---\| \| 3pi+ 32U4 OLED Robot, top view. \| | |---| **Comparison with the original 3pi** | [![](https://core-electronics.com.au/attachments/localcontent/0J2415_244097956e6.jpg)](https://core-electronics.com.au/attachments/localcontent/0J2415_311798e523c.jpg) | |---| | Original Pololu 3pi robot. | The 3pi+ 32U4 OLED offers many major improvements over the [original 3pi](https://core-electronics.com.au/pololu-3pi-robot.html), including: - ATmega32U4 microcontroller with Arduino-compatible bootloader can be programmed directly through a USB connection - Quadrature encoders on both motors for closed-loop position and speed control - Graphical OLED display - Full 9-axis IMU (three-axis gyro, accelerometer, and compass) - Bottom-loading battery holders keep batteries accessible even if additional levels are added - Full wrap-around bumper to protect electronics from collisions - Two bump sensors on the front The 3pi+ 32U4 uses a different microcontroller with different pin mappings compared to the older 3pi, and some of the software library interfaces are different, so programs written for the original 3pi will not work on the 3pi+ 32U4 without modification. **Dimensions** | Size: | 97L × 96W × 36H mm | |---|---| | Weight: | 100 g[1](https://core-electronics.com.au/#note1) | **General specifications** | Assembled: | N | |---|---| | Version: | Hyper Edition (15:1 HPCB Motors) | **Identifying markings** | PCB dev codes: | 3pi03b | |---|---| | Other PCB markings: | 0J13485 | **Notes:** 1Of assembled robot without batteries. **Documentation and other information** - ![](https://core-electronics.com.au/attachments/localcontent/0J11323_552447e8ac.jpg)**Pololu 3pi+ 32U4 User’s Guide (Printable PDF)** User’s manual for the Pololu 3pi+ 32U4 robot. **File downloads** - **Pololu A-Star 32U4 drivers for Windows (version 1.3.0.0) (7k zip)** This download contains the Windows drivers for the A-Star 32U4 and the rest of Pololu's 32U4 family of boards. - **Pinout and power distribution diagrams of the 3pi+ 32U4 OLED Control Board (1MB pdf)** - **Schematic diagram of the 3pi+ 32U4 OLED Control Board (391k pdf)** - **Dimension diagram of the 3pi+ 32U4 OLED Robot (1MB pdf)** - **3D models of the 3pi+ 32U4 OLED Robot (19MB zip)** - **Front, top, and side views of the 3pi+ 32U4 OLED Robot (453k zip)** These DXF drawings make it possible to get various dimension measurements of the 3pi+ 32U4 OLED Robot. **Recommended links** - **[Pololu3piPlus32U4 Arduino library](https://github.com/pololu/pololu-3pi-plus-32u4-arduino-library)** - **[Pololu3piPlus32U4 library documentation](https://pololu.github.io/pololu-3pi-plus-32u4-arduino-library/)** - **[Arduino Software](https://www.arduino.cc/en/software/)** Arduino integrated development environment (IDE) software - **[A-Star repository on GitHub](https://github.com/pololu/a-star)** This repository contains Arduino add-on files, Windows drivers, and bootloaders for the A-Star 328PB, A-Star 32U4, and the rest of Pololu's 32U4 family of boards. - **[ATmega32U4 documentation](https://www.microchip.com/en-us/product/ATmega32u4)** Microchip’s product page for the ATmega32U4 AVR microcontroller, with links to its datasheet, application notes, and other resources. ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/i/m/image_1734.jpg)