# Shamrock LED earrings (pair) - Saint Patrick's Day

Shamrock LED earrings using ATtiny84a micro-controller, battery included

- **Seller:** [California STEAM](https://lectronz.com/stores/californiasteam), Stockton, California, United States
- **Price:** $24.00 (USD, before shipping and taxes)
- **Availability:** Retired, no longer sold
- **Categories:** Wearables, Application
- **Product page:** https://lectronz.com/products/shamrock-led-earrings-pair-saint-patricks-day

## Images

![Shamrock LED earrings (pair) - Saint Patrick's Day](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6ODg4NywicHVyIjoiYmxvYl9pZCJ9fQ==--cf3debbe1a06e17cfa2dab946a1a84eabd2a96d1/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJKUEciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--a1419a086f227676aca33a49760ac51e58b523e3/2021-09-29T04-49-49.056Z-IMG_4512.JPG)
![Shamrock LED earrings (pair) - Saint Patrick's Day](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6ODg4OCwicHVyIjoiYmxvYl9pZCJ9fQ==--cadbc70a8bcfb34faec0ed569bb0d9f9340a2fd8/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/2020-01-20T00-44-45.757Z-IMG_2384-2.jpg)
![Shamrock LED earrings (pair) - Saint Patrick's Day](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6ODg4OSwicHVyIjoiYmxvYl9pZCJ9fQ==--f99118e2adb027fcde222f3d88e9c0e8201f3a91/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/2019-01-14T02-27-28.000Z-IMG_6909.jpg)
![Shamrock LED earrings (pair) - Saint Patrick's Day](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6ODg5MCwicHVyIjoiYmxvYl9pZCJ9fQ==--9d9091fd62acb41d6ca577eb92df3053d9f8504d/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/2019-01-14T02-27-28.000Z-IMG_6910.jpg)
![Shamrock LED earrings (pair) - Saint Patrick's Day](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6ODg5MSwicHVyIjoiYmxvYl9pZCJ9fQ==--4a641512f72304624aa77cb70358d578bc4f253d/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/2019-01-14T02-27-28.000Z-IMG_6917.jpg)

## Description

#### What is it?

Earrings with LED's designed for  Saint Patrick's Day. The different patterns are controlled by an ATtiny84a and programmed with the Arduino IDE. These earrings are powered by a CR1225 coin cell battery, and will last at least 3 days, and up to 2 weeks (depending on the pattern). A button on the back of the earring can be used to select different patterns, or to turn off the device.

These earrings can be programmed with the Arduino IDE, using a SPI programmer (for example the Arduino UNO as programmer). 

#### Why did you make it?

Adding some more variances to the LED earring family. The first earrings ([Spiral](https://www.tindie.com/products/15320/)) were such a success, so I used that same concept to light up the leaves on the shamrock. I also fixed some of the issues I noticed on the earlier designs.  

#### What makes it special?

The earrings are entirely assembled by hand. I use a stencil and reflow oven to install the components on the font, the back is done with a soldering iron. The Arduino IDE is used to program the micro-controller. To conserve energy, the ATtiny84a is in sleep mode, 99.9% of the time. It only wakes up to determine which LED should be turned on or off before entering sleep mode again.

## Shipping policy

See item details for estimated arrival times.

Customs and import taxes:
Buyers are responsible for any customs and import taxes that may apply. I'm not responsible for delays due to customs.

Cancellations: not accepted:
Please contact the seller if you have any problems with your order.