> **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

# Espruino 1.4 - Open Source Javascript Microcontroller

**Type:** Product page · **SKU:** ADA1887 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/espruino-open-source-javascript-microcontroller.html ([markdown](https://core-electronics.com.au/espruino-open-source-javascript-microcontroller.html.md))

## Retired product

This product is retired and no longer available for purchase. Search the catalogue for an alternative.

## How to buy

- **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

Try the JavaScript of things with the **Espruino** - the world's first open-source JavaScript microcontroller! This little board has an STM32 microcontroller pre-programmed with Espruino all ready to go so you can start playing with Javascript-microcontrollers. **Warning: if you only use Assembly and think that even embedded C/C is for wimps, this device might explody your head.**

The Espruino is a tiny computer with a JavaScript interpreter, allowing for instant feedback from whatever device you're working with. Simply set up your code with the Espruino and send it to the device without having to wait for the board to 'flash.'

The Espruino's fast response time has a lot of advantages. It allows for quick and easy debugging and is a great way to test your project before your big reveal. In addition, you can control the Espruino from almost anything - Windows, Mac OS, Linux, RasPi, Android, anything that can talk to a USB Serial port.

The Espruino also interacts well with Adafruit's [NeoPixels.](https://core-electronics.com.au/#) For more info, check out Espruino's page on the WS2811 and WS2812.

While the main advantage of the Espruino is its instant execution, it can also be used as a traditional board through a Web-based IDE hosted on your computer. The microcontroller also uses less power than Linux Boards (although its of course a lot less powerful as well) so will run longer on battery power, it has loads of IO pins, and it can be used as an IO board for PCs, Macs, or Rasp Pis without having to program it first. Simply take the Espruino out of its packaging and get started!

There's also more info on the Espruino page including tutorials and code examples. Click here for technical details and a diagram

## Technical Details

**Revision History:**

- **As of 12/18/2014 the Espruino board is now shipping with the following improvements:**
    - CE Approval
    - 32kHz crystal on board (it's *much* better at keeping time accurately now)
    - Pads for a Lithium Ion charger IC (if you want to fit one)
    - Slightly moved, but much stronger Micro USB connector
    - Much lower power voltage regulator - the old board drew 0.1mA in sleep, this one draws 0.03mA!
    - Solder jumped so you can turn the reset button into a second general purpose button
    - [Schematic](https://cdn-shop.adafruit.com/datasheets/1887_Schematic.pdf)

Dimensions:

- 53mm x 40mm x 1.5mm / 2.1" x 1.6" x 0.06"
- Height w/ JST: 10mm / 0.4"
- Weight: 8g

For product support, replacement parts and warranty for Espruino products click here.

 ![](https://core-electronics.com.au/media/wysiwyg/resources/rohs_icon.jpg)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/1/8/1887-01.jpg)