> **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

# MicroUSB to 5.5/2.1mm DC Barrel Jack Adapter

**Type:** Product page · **SKU:** ADA2789 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/microusb-to-5-5-2-1mm-dc-barrel-jack-adapter.html ([markdown](https://core-electronics.com.au/microusb-to-5-5-2-1mm-dc-barrel-jack-adapter.html.md))

The premise of this MicroUSB to 5.5/2.1mm DC Barrel Jack Adapter is simple. There's a MicroUSB plug on one end and a 5.5mm/2.1mm DC barrel jack with center positive...

## Pricing

- **Price:** $3.85 (inc GST) — $3.50 AUD, exc GST
- **Quantity discounts:** 10+ $3.39 (exc GST) · 50+ $3.33 (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=ADA2789:1` (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/ADA2789:1.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 premise of this **MicroUSB to 5.5/2.1mm DC Barrel Jack Adapter is simple. There's a MicroUSB plug on one end and a 5.5mm/2.1mm DC barrel jack with center positive polarity on the other. This allows you to connect one of our [5V 2 Amp](https://core-electronics.com.au/5v-2a-2000ma-switching-power-supply-ul-listed.html), [5V 4A](https://core-electronics.com.au/5v-4a-4000ma-switching-power-supply-ul-listed.html) or [5V 10 Amp](https://core-electronics.com.au/5v-10a-switching-power-supply.html) adapters to something that expects to connect to 5V USB. [We also have a cable-version of this, but this one is compact and cute!](https://core-electronics.com.au/microusb-plug-to-5-5-2-1mm-dc-barrel-jack-adapter.html)

Since this does not have any resistors or other connections inside for the data lines, this won't work for charging an iPhone, iPod or iPad or other device which expects some sort of resistance on the D+ and D- connections. It does, however, work great for [Arduinos](https://core-electronics.com.au/#), [BeagleBones](https://core-electronics.com.au/#), [Raspberry Pis](https://core-electronics.com.au/#), many generic cellphones & Android devices, as well as most other USB-powered gadgets.

**There is no regulator or voltage protection in this adapter. If you plug in a 9V or 12V power supply in, you could destroy something expecting only ~5V so be very careful!**

## Technical Details

- 37.9mm x 12.3mm x 9.2mm / 1.5" x 0.48" x 0.36"
- Weight: 4.6g

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/2/7/2789-04.jpg)