> **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 # Shield stacking headers for Arduino (R3 Compatible) **Type:** Product page · **SKU:** ADA85 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia) **Page:** https://core-electronics.com.au/shield-stacking-headers-for-arduino-r3-compatible.html ([markdown](https://core-electronics.com.au/shield-stacking-headers-for-arduino-r3-compatible.html.md)) “How could something so simple be so useful?” Adafruit heard once that in the 4th millenium B.C. some guy asked the person who invented the wheel that question. The person... ## Pricing - **Price:** $3.95 (inc GST) — $3.59 AUD, exc GST - **Quantity discounts:** 10+ $3.48 (exc GST) · 50+ $3.41 (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=ADA85:1` (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/ADA85:1.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 *“How could something so simple be so useful?”* Adafruit heard once that in the 4th millenium B.C. some guy asked the person who invented the wheel that question. The person who invented the wheel’s answer, Adafruit were told, was something like “well it’s not actually that simple - it required engineering and innovation and this thing called mathematics that probably hasn’t been discovered yet and blah blah blah…” on and on and on until the guy got called away to go fight a minotaur or something. Cool story, right? Adafruit mention it because stacking headers are sort of like the wheel to the Arduino civilization - meaning this thing that’s incredibly simple, incredibly useful, but still so brilliant you’re amazed they didn’t exist before the day they started existing. What are they for? Stacking. You put the headers on top of your Arduino and then you can add shields like our [Protoshield](https://core-electronics.com.au/adafruit-proto-shield-for-arduino-kit-v-5.html) or our [Motor Shield ](https://core-electronics.com.au/adafruit-motor-stepper-servo-shield-for-arduino-v2-kit-v2-0.html) or our [Proto-Screwshield](https://core-electronics.com.au/proto-screwshield-wingshield-kit.html) (pictured above) to get your Arduino doing all the cool things you want it to. Adafruit's set includes 1x 10-pin header, 2x 8-pin headers, 2x 6-pin headers, and one 2x3 header. The legs are all 10.5mm long, so after PCB thickness (1.7mm) you have a height of 8.8mm - just enough to clear the Arduino's USB-B connector. They’re also fully compatible with shields designed for [Arduino R3](https://core-electronics.com.au/arduino-uno-r3-atmega328-assembled.html) and the [Leonardo](https://core-electronics.com.au/arduino-leonardo.html). For shields that don’t use the 10-pin header or 2x3 header, use the 6 or 8 pin ones. Some experimentation might be necessary to get these working. For example: - You can stack on top of a Proto Shield, but not if there is a breadboard on it - You can stack on top of an Adafruit Motor Shield v2 - You can stack on top of a Wave, NFC/RFID, or GPS shield with no problems - You can stack on top of an Ethernet shield, but you'll need two sets of headers to clear the Ethernet jack. - You can't stack on top of Adafruit's TFT or LCD shields - Some shields use the ICSP (2x3) header in which case you may need to solder in the stacking 2x3 Really, the possibilities are endless, just keep in mind that you may need to do some adjusting of code to handle the multiple devices and that there may be pin compatibilities. ## Technical Details ## ![](https://core-electronics.com.au/attachments/localcontent/rohs_icon_8216055e11.jpg) ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/8/5/85-05.jpg)