An interactive wall that turns small wins into big dreams.
It’s basically an interactive device that helps motivate students.
When a student or a team finishes a challenge, they get an 3D-printed apples with magnets with their name on it. They stick it onto the tree.
The hall sensors detects it, lights up an LED, and plays a voice message to congratulate them. It’s instant feedback and a little celebration for their teamwork.
In my science class, I used to give out stickers when students finished experiments.But honestly, they’d tear, get lost, or just didn’t last.
I built an Honor Tree—When a student does well, their apple lights up on the tree.
I designed a multi-layer tree in 2D Designed.
Design and Manufacture
I designed in 3D-printed apples with each student’s name, and added magnets.
Design and Manufacture
I made the PCB in EasyEDA, milled it with a Roland MDX40, and used an XIAO ESP32C for the brains.
Design and Manufacture
Below is a table with the components used:
| Part | Value | Device | Package | Description |
|---|---|---|---|---|
| XIAO | 10201038814PIN_600MIL-SMD | 10201038814PIN_600MIL-SMD | 14PIN_SMD-600MIL | -- |
| PINS1 | -- | PINHD-1X8/90-2.54 | 1X08/90 | PIN HEADER |
| PINS2 | -- | PINHD-1X3/90-2.54 | 1X03/90 | PIN HEADER |
| R1 | 499 ohm | RES-US1206FAB | R1206FAB | Resistor (US Symbol) |
| R2 | 1k ohm | RES-US1206FAB | R1206FAB | Resistor (US Symbol) |
| S1 | -- | 3*6*2.5mm SW-PB-2TSA363G25-250B | 3*6*2.5mm SW-PB-2TSA363G25-250B | OMRON SWITCH |
| U$1 | LEDFAB1206 | LEDFAB1206 | LED1206FAB | LED |
When a student puts their apple near the Hall sensor, the LED lights up and a happy “Great job!” plays.
Connection layout
code
Test
As preparation for The Honor Tree, I built a basic version first.
| Component | Quantity | Price (per piece) | Shop | Notes |
|---|---|---|---|---|
| PLA Filament | 93g | -- | -- | Provided by FabLab Formshop |
| 3mm Corrugated Cardboard | 60*40mm × 3 pcs | -- | -- | Provided by FabLab Formshop |
| 9mm Felt Board | 80*120mm × 1 | 21.8 RMB | Taobao | -- |
| Seeed XIAO | 1 | 34.05 RMB | Taobao | -- |
| LED (WS2812B) | 8 pcs | 17.36 RMB | Taobao | -- |
| Hall Sensor (A3144) | 8 pcs | 17.6 RMB | Taobao | -- |
| Magnet (Neodymium) | 8 pcs | 3.3 RMB | Taobao | -- |
| DFRobot DFPlayer Mini | 1 | 39 RMB | Taobao | -- |
| Speaker (3W 8Ω) | 1 | 4.12 RMB | Taobao | -- |
| SD Card (8GB) | 1 | 3.7 RMB | Taobao | -- |