> **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

# Step Switch with LED - Three Pack of White with Red LED - PB86

**Type:** Product page · **SKU:** ADA5519 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/step-switch-with-led-three-pack-of-white-with-red-led-pb86.html ([markdown](https://core-electronics.com.au/step-switch-with-led-three-pack-of-white-with-red-led-pb86.html.md))

These hinged momentary step switches are evocative of the 16-step sequencer keys on TR-808 sythesizers. Also sometimes used on A/V equipment, they're...

## Pricing

- **Price:** $8.35 (inc GST) — $7.59 AUD, exc GST
- **Quantity discounts:** 10+ $7.36 (exc GST) · 50+ $7.21 (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=ADA5519:1` (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/ADA5519:1.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

These hinged momentary step switches are evocative of the [16-step sequencer keys on TR-808 sythesizers](https://en.wikipedia.org/wiki/Roland_TR-808). Also sometimes used on A/V equipment, they're very tactile with a good clicky feel. And of course, the built in red LED is great for indicating when something is on or off - or as visual feedback when clicked.

There's four legs to the switch for mechanical stability. The switch is momentary SPDT type, there are two pins of the four that act as the common, and they naturally connect to one or the other of the remaining pins when the button is pressed. Check the diagram below to see which pins are the pole and which are the two throws. You may also want to use a multimeter on continuity mode to verify.

Note they are not breadboard or perf-board friendly! You'll need to either hand-wire or design into a PCB.

The LED is a simple 3mm, 20mA max, 2.1V-forward-voltage, red LED embedded into the plastic. There is no resistor built in so a 1K or so resistor will be useful to keep the LED from burning out. [Adafruit's LED guide will help you on how to pick a resistor](https://learn.adafruit.com/all-about-leds) - then you can PWM dim the LED from a microcontroller pin, or connect it to a digital output as desired.

##  Technical Details 

Button dimensions: 17mm x 12mm x 14mm

- [Diagram](https://core-electronics.com.au/attachments/localcontent/step_switch_83489a37067.png)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/A/D/ADA5519-1.jpg)