Final Project Rough Idea¶

Currently, I have two ideas about the final project.
¶

One is ” ice 3D printer “.

I thought this would be technically very difficult, so I thought of a backup plan.

That’s this lighting accessory.

1. Concept¶

I created a lighting accessory based on the motif of a traditional Japanese lantern “Andon(行灯)”.
This accessory is designed to be worn with a kimono or a yukata for women.
At events such as festivals and fireworks displays, the lights shine in response to the music and brightness of the surroundings.
In addition, you can program the glow to match the design of the kimono or yukata you are wearing.

2. 3D Modeling¶

I have created two image images when the LED is lit and when it is not lit.
This was created on week03.

I have modelled this Accessories to a size of 20mm wide, 20mm deep and 35mm high.
This will be the size of the final accessories.

[Normal ver.]

[Lighting ver.]

3. Assumption of Use¶

In Japan, many people wear traditional clothing such as yukata or kimono during festivals.
Some women wear accessories.
When I imagined these accessories glowing in sync with the atmosphere around them at night, I thought it was very [Kawaii(cute)].
There is also a very large festival held every year in the town where the Fab space is to be opened in 2022.

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栗山天満宮秋季例大祭

4. Research Ideas¶

I looked for examples similar to the accessories I was making.
So I decided to brush up on my ideas based on a few reference examples.

(1) Output Device Idea ¶

(2) Programmable LED Earrings¶

(3) Peltier element idea（I’m not thinking about this idea now.)¶

5. Design Sketch¶

At first, I considered using a Peltier element.
However, I decided that using the Peltier element would make the accessory heavier.
The reason is that I want to keep the weight down to about 10 grams in order to make this accessory a practical design.

I also decided to use an infrared communication system to control the LED lighting pattern of the earrings.
The reason why I didn’t use [ATtiny45] is because of memory problem. The reason why I didn’t use [ATtiny45] is because of the memory problem.
I wanted to prepare [X number] of colors to make some LED lighting patterns.
So I decided to use [ATtiny85], which has a lot of memory capacity.
In order to control analog information such as ambient sound and light sent by infrared communication, I decided to use an ESP32.
The accessory with the ESP32 built in is the [obi clamping].
The ESP32 takes the information received from the light and sound sensors and combines it with the lighting patterns to send the information to the earring side using an infrared communication system.

About Earrings Design¶

The earring will be ATtiny85 to control the lighting of the Neopixel.
We plan to use 2 x 2 pairs of neopixels for a total of 4.
Two 1.5V button batteries are used to power each accessory.
An infrared receiver (PIC79603) will be installed at the bottom of the accessory to receive the signals from the ESP32.

Parts used

component	vender	cost(JPY)	quanitity	total	notes
ATtiny85	Akitsukidenshi	¥250	2	¥500	shop link
Neopixel_WS2813	Akitsukidenshi	¥30	2	¥60	shop link
Infrared receiver_PIC79603	Akitsukidenshi	¥120	2	¥240	shop link
Coin battery_LR44/1.5V	Akitsukidenshi	¥100	1	¥100	shop link

About Obi Clasp Design¶

Inside the obi clasp is a circuit that uses the ESP32 and a 1000mAh rechargeable lithium battery.
The ESP32 also controls an infrared transmitter to read input from the sound sensor, light sensor, accelerometer, and potentiometer and send the information to the side of the earring.
The battery is designed for up to three hours of use.
We have also decided to incorporate a charging circuit to make this a rechargeable device.