Forget-Me-Glass: The Smart Glass Holder

You know that moment when you finish your juice, put the glass back in its holder, and just... leave it there? Yeah, same

But then comes the Mom Glare

And the speech:

How many times do I have to tell you? Take your glass back!

So I said no more, and made the glass holder snitch on me before my mom could.

Introducing Forget Me Glass

A smart glass holder powered by Arduino, judgement, and guilt - than starts a countdown when you place your glass, then screams at you if you forget to take it back.

Is it useful? Yup

Is it dramatic? Absolutely

Is it weirdly satisfying? Oh, 100%

Components Required

• Arduino Uno R4 Wi-Fi: The brain of this operation. Comes with a built-in LED matrix for emotional pixel art and enough power to judge you laziness
• IR Sensor Module: Detects if your glass is present or absent. Think of it as a laser-eyed butler that tattles when you slack off.
• Active Buzzer: The sassy screamer. beeps like it's auditioning for a horror movie every time you mess up.
• Jumper Wires: The spaghetti of connectivity. helps your components spill the tea to each other

Step 1: Prepare Your STL or CAD File

JUSTWAY: The Secret Sauce for That Pro Finish

Let's be honest:

Nothing kills a cool project faster than duct tape and cardboard.

I wanted Forget-Me-Glass to look like something you'd find in a store - not a science fair. That's where JUSTWAY came in.

Why JUSTWAY Rocks

JUSTWAY is a professional 3D printing service that helps makers turn DIY chaos into polished, product-ready awesomeness. Whether you're a beginner or an engineer, they've got your back.

Here's what make them awesome:

• Instant Quotes: Upload your STL or CAD file and get a price instantly. No back and forth emails
• Live Model Preview: Rotate, zoom, and admire your model before placing order.
• Tons of Materials: Choose from SLA resin (high detail), Nylon PA-12 (tough), CNC Aluminum (fancy) and more.
• Clean Industrial Finish: Prints that feel more "Kickstarter prototype" and less "kindergarten art."
• Engineer Support: Real experts review your design so you don't print a disaster.

How to Order Your 3D Printed Glass Holder on JUSTWAY

Here's a step-by-step breakdown of how I got my design printed by JUSTWAY - so you can too:

Design your holder using any 3D modelling software (Fusion 360, Tinkercad, SolidWorks, etc.) Save it as.STL or.STEP

Step 2: Go to Website

Head to their homepage and click on "Get Instant Quote" After uploading your STL or CAD file The system will load your model

Step 3: Choose Your Options

Material: I used PLA for clean and smooth finish

Color: Choose what looks best for your setup

Finish: Default finish is great, or you can request sanding/coating

Quantity: One is enough.

NEW for 2025 - Transparent 3D Printing & Multicolor Printing

Transparent 3D Printing Materials (its's great for showcasing internal electronics)

• High-clarity resins for seeing sensors, LEDs, or inner mechanisms.
• Perfect for educational builds or prototypes where visibility matters.

Multicolor 3D Printing (Used for my black Arduino logo)

• Prints multiple colors in one part - no painting required.
• Adds branding, labels, or style directly into the enclosure.
• My enclosure features a crisp black Arduino logo for polished, branded look.

Step 4: Preview You Model

Use the 3D viewer to check your design. Rotate it. Zoom in. Make sure it looks awesome.

Step 5: Confirm and Pay

Add it to your cart and check out. Payment is secure and simple. Sit back and Wait your part will be professionally printed and shipped right to your doorstep. Mine arrived perfectly finished.

BONUS: 15% Summer Cashback Offer!

JUSTWAY is offering you up with 15% cashback on any order made from June 1 - August 31, 2025

How to Claim:

• Place your order on www.justway.com
• After order completion, simply email marketing03@justway.com with your order number(s)
• Get 15% of your order value back as cashback in JUSTWAY account for your future orders

Step 6: Wiring All the Things

IR Sensor → Arduino R4 Wi-Fi

• VCC → 5v
• GND → GND
• OUT → D2

Buzzer → Arduino R4 Wi-Fi

• +ve → D3
• -ve → GND

Step 7: Upload the Code

Open Arduino IDE, connect your Arduino Uno R4 Wi-Fi, and upload this sassy sketch:

#include "ArduinoGraphics.h"
#include "Arduino_LED_Matrix.h"
ArduinoLEDMatrix matrix;
const int irPin = 2;       // IR sensor input pin
const int buzzerPin = 3;   // Buzzer output pin
void setup() {
Serial.begin(115200);
matrix.begin();
pinMode(irPin, INPUT);
pinMode(buzzerPin, OUTPUT);
digitalWrite(buzzerPin, LOW);
}
void loop() {
if (digitalRead(irPin) == HIGH) {
// No glass - show happy face
matrix.loadFrame(LEDMATRIX_EMOJI_HAPPY);
digitalWrite(buzzerPin, LOW);
delay(100);
}
if (digitalRead(irPin) == LOW) {
// Glass placed - start countdown
for (int count = 60; count >= 0; count--) {
if (digitalRead(irPin) == HIGH) break;
matrix.beginDraw();
matrix.stroke(0xFFFFFFFF);
matrix.clear();
matrix.textFont(Font_5x7);
matrix.beginText(0, 1, 0xFFFFFF);
matrix.println(count);
matrix.endText();
matrix.endDraw();
delay(1000);
}
// Glass is still there - now it screams
while (digitalRead(irPin) == LOW) {
matrix.loadFrame(LEDMATRIX_EMOJI_BASIC);  // Judgy stare
digitalWrite(buzzerPin, HIGH);            // Scream time
delay(100);
}
digitalWrite(buzzerPin, LOW); // Silence once you're responsible again
}
}

Test It Out

Time to test if your new robot judge works!

• Power it up.
• Place a glass on the holder.
• Watch the LED matrix start counting down from 60.
• Forget to remove it - buzzer SCREAMS.
• Remove the glass - peace is restored

Watch It Action

Final Thoughts

Forget-Me-Glass started as a joke - but it's been life-changing (and mom-saving). Whether you're forgetful, chaotic, or just enjoy ridiculous inventions that actually work, this one's a must try.

And remember - great hardware deserves a great home. So let JUSTWAY help you level up your prototypes to look like they belong in a tech store, not taped to a cereal box.