> **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

# Breadboard-friendly Mini PIR Motion Sensor with 3 Pin Header

**Type:** Product page · **SKU:** ADA4871 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/breadboard-friendly-mini-pir-motion-sensor-with-3-pin-header.html ([markdown](https://core-electronics.com.au/breadboard-friendly-mini-pir-motion-sensor-with-3-pin-header.html.md))

PIR sensors are used to detect motion from pets/humanoids from about 5 meters away (possibly works on zombies, not guaranteed). This sensor is much smaller than most PIR modules, which makes it great for unobtrusive projects. It's also fully-contained - only needs power and ground, and it's breadboard or perfboard friendly.

## Pricing

- **Price:** $7.50 (inc GST) — $6.82 AUD, exc GST
- **Quantity discounts:** 10+ $6.62 (exc GST) · 50+ $6.47 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 19 and Aug 24.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=ADA4871:1` (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/ADA4871:1.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

PIR sensors are used to detect motion from pets/humanoids from about 5 meters away (possibly works on zombies, not guaranteed). This sensor is much smaller than most PIR modules, which makes it great for unobtrusive projects. It's also fully-contained - only needs power and ground, and it's breadboard or perfboard friendly.

Usage is super simple: You can power it from 3 to 12V DC, there's an onboard regulator. Digital signal output is 3.3V high/low. The signal goes high when motion is detected, and stays high for another 2 seconds, so you have plenty of time to read the value.

- Connect pin #1 to ground (there's a tiny minus - sign next to the pin)
- Connect pin #2 to output signal (there's a tiny O next to this pin that goes high and low)
- Connect pin #3 to power (there's a tiny plus + sign next to the pin)

The attached 13.8mm diameter lens is focused to 2 to 5 meters away with a 100-degree spread. [These are smaller and less expensive than Adafruit's PIR modules, and you'll find the performance is OK but not as great as the larger modules, for example not having as wide of a range and taking longer to trigger.](https://core-electronics.com.au/pir-motion-sensor.html)

**[For a PIR tutorial with CircuitPython and Arduino code examples and project ideas, check out Adafruit's ](https://learn.adafruit.com/pir-passive-infrared-proximity-motion-sensor)PIR sensor tutorial page[!](https://learn.adafruit.com/pir-passive-infrared-proximity-motion-sensor)**

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/4/8/4871-03.jpg)