> **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

# Pro Micro - 5V/16MHz

**Type:** Product page · **SKU:** DEV-12640 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia)
**Page:** https://core-electronics.com.au/pro-micro-5v-16mhz.html ([markdown](https://core-electronics.com.au/pro-micro-5v-16mhz.html.md))

Here at SparkFun, we refuse to leave ‘good enough’ alone. That’s why we’re adding to our line-up of Arduino-compatible microcontrollers once more! The Pro Micro is similar to the Pro Mini except with an ATmega32U4 on board. The USB transceiver inside the 32U4 allows us to add USB connectivity on-board and do away with bulky external USB interface.

## Pricing

- **Price:** $42.20 (inc GST) — $38.36 AUD, exc GST
- **Quantity discounts:** 5+ $37.21 (exc GST) · 25+ $36.45 (exc GST) · 100+ $34.91 (exc GST)

## Availability & dispatch

- Out of stock — the product page offers email notification when it returns.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=DEV-12640:1` (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/DEV-12640:1.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

Here at SparkFun, Sparkfun refuse to leave 'good enough' alone. That's why we're adding to our line-up of Arduino-compatible microcontrollers once more! The Pro Micro is similar to the Pro Mini except with an ATmega32U4 on board. The USB transceiver inside the 32U4 allows us to add USB connectivity on-board and do away with bulky external USB interface.

 This tiny little board does all of the neat-o Arduino tricks that you're familiar with: 4 channels of 10-bit ADC, 5 PWM pins, 12 DIOs as well as hardware serial connections Rx and Tx. Running at 16MHz and 5V, this board will remind you a lot of your other favorite Arduino-compatible boards but this little guy can go just about anywhere. There is a voltage regulator on board so it can accept voltage up to 12VDC. If you're supplying unregulated power to the board, be sure to connect to the “RAW” pin on not VCC.

 This latest revision corrects the silk error from the last version of the board so that pin 14 is correctly labeled. We've also added a PTC fuse and diode protection to the power circuit and corrected the RX and TX LED circuit.

 Not sure which Arduino or Arduino-compatible board is right for you? Check out our [Arduino Buying Guide](https://www.sparkfun.com/arduino_guide)!

**Dimensions:** 1.3x0.7"

**Features:**

- ATmega32U4 running at 5V/16MHz
- Supported under Arduino IDE v1.0.1
- On-Board micro-USB connector for programming
- 4 x 10-bit ADC pins
- 12 x Digital I/Os (5 are PWM capable)
- Rx and Tx Hardware Serial Connections
- Our Smallest Arduino-Compatible Board Yet!
 
**Documents:**

- [Schematic](https://core-electronics.com.au/attachments/localcontent/Pro_Micro_v13_714755f7317.pdf)
- [Eagle Files](https://core-electronics.com.au/attachments/localcontent/Pro_Micro_v13_1808485d3f3.zip)
- Hookup Guide
- [Datasheet](https://core-electronics.com.au/attachments/localcontent/ATMega32U4_90717eb6559.pdf) (ATmega32U4)
- [Firmware Note](https://core-electronics.com.au/attachments/localcontent/32U4Note_302100bd229.pdf)
- [Arduino Addon Files](https://core-electronics.com.au/attachments/localcontent/master_754603faaec.zip)
- [GitHub](https://github.com/sparkfun/Pro_Micro) (Design Files)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/p/r/pro_micro_-_5v_16mhz__dev-12640__01.jpg)