> **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 # Tower Light - Red Yellow Green Alert Light with Buzzer - 12VDC **Type:** Product page · **SKU:** ADA2993 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia) **Page:** https://core-electronics.com.au/tower-light-red-yellow-green-alert-light-with-buzzer-12vdc.html ([markdown](https://core-electronics.com.au/tower-light-red-yellow-green-alert-light-with-buzzer-12vdc.html.md)) THE REACTOR'S MELTING DOWN! GRAB THE FUEL CORE, JENNA, AND EVACUATE THE COMMAND CENTER! With this flexible Red-Yellow-Green Alert Light you can monitor the status... ## Pricing - **Price:** $71.80 (inc GST) — $65.27 AUD, exc GST - **Quantity discounts:** 10+ $63.32 (exc GST) · 50+ $62.01 (exc GST) ## Availability & dispatch - Available with a lead time — expect dispatch between Aug 28 and Sep 01. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=ADA2993:1` (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/ADA2993:1.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 REACTOR'S MELTING DOWN! GRAB THE FUEL CORE, JENNA, AND EVACUATE THE COMMAND CENTER! With this flexible **Red-Yellow-Green Alert Light** you can monitor the status of a project, machine, or even if the bathroom is occupied! Adafruit got some really nice tower lights here, first up they come in slimming Adafruit black, they're easy to attach with mounting holes, and you can rotate the light mount so it can be horizontal, vertical or any angle in between (180 rotation). **This is the tri-color version** but They also have a smaller [Red-only Alert Light](https://core-electronics.com.au/tower-light-red-alert-light-with-buzzer-12vdc.html) in the store if you want a smaller, simpler alert light Alert tower lights are really easy to use. The brown wire is the common +12V power line, then the other wires are connected to ground to activate each of the three LED lights: red wire for red light, yellow wire for yellow light and, you guessed it, green wire for green light. The final orange wire is what controls the buzzer which will sound continuously when the wire is grounded. Adafruit did notice that you can't have both the yellow and red lamps on at once, and in general its best to only have one lamp lit at a time for max brightness. The buzzer can be turned on whenever, it does not seem to be affected by the lights. You will need a 12VDC power supply to get it going, [the one that We carry will do well for fixed installations](https://core-electronics.com.au/12v-5a-switching-power-supply.html). If you are using this with a 3V or 5V microcontroller or computer, use [4 x NPN transistors](https://core-electronics.com.au/npn-bipolar-transistors-pn2222-10-pack.html) or [N-channel mosfets](https://core-electronics.com.au/n-channel-power-mosfet-30v-60a.html) to sink current from each wire. [Adafruit's guide on analog LED strips is pretty much the same wiring you need](https://learn.adafruit.com/rgb-led-strips/usage), except its only about 50mA per segment. If you desperately need something that can run off of 5V [you might consider wiring up your own white LEDs instead of using the LEDs that come with it](https://core-electronics.com.au/super-bright-white-5mm-led-25-pack.html). ### Technical Details - Range of motion: 180° - Height: 340mm / 13.4" - Diameter of light: 50mm / 1.97" - Weight: 221g ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/2/9/2993-03.jpg)