An excellent desk companion, which implements the best study technique backed by various studies. Enjoy the futuristic design with round display, and leave a like or boost to support me on my journey to invent cool new stuff!

Instruction Manual:

Parts:

• Arduino UNO

   

• 1.28” Round TFT (GC9A01, SPI) → Purchase Link: [https://de.aliexpress.com/item/1005006051175539.html?spm=a2g0o.order_list.order_list_main.11.271a5c5fBSaslE&gatewayAdapt=glo2deu](https://de.aliexpress.com/item/1005006051175539.html?spm=a2g0o.order_list.order_list_main.11.271a5c5fBSaslE&gatewayAdapt=glo2deu)

   

• Rotary encoder with push button (just a regular one from aliexpress)

   

• Small speaker (I reused one from an old toy, but any 8Ω speaker or buzzer works)

   

• 1× LED + 220–330Ω resistor (ask chatgpt for diffeent colours you might need different resistors (eventhough it's not a must, just a safety recommendation))

   

• Jumper wires (Male female)

   

• 3D printed enclosure (my design)

   

• 3D printed knob (I used this one because it's absolutely fantastic: [https://makerworld.com/en/models/1974135-keychron-knob-knurled?from=search#profileId-2123022](https://makerworld.com/en/models/1974135-keychron-knob-knurled?from=search#profileId-2123022))

   

If you need to attach to cables to the same port here is how to create a sort of chain:

• Cut jumper wires in half
• Strip 3–4 mm
• Twist and pre-tin the ends
• Attach two half wires to another half wire to get a wire with one male port and two female ports
• Now you can stick the male port into the Arduino UNO and the two female ports e.g. into display and knob (e.g. for 5V in TFT)

Wiring:

TFT (SPI)

• VCC → 5V
• BL (LED) → 5V
• GND → GND
• SCL → D13
• SDA → D11
• CS → D10
• DC → D8
• RST → D7

Rotary Encoder

• CLK → D2
• DT → D3
• SW → D4
• + → 5V
• GND → GND

Speaker

• One wire → D9
• One wire → GND

LED

• D6 → resistor → LED long leg
• LED short leg → GND

Software:

Install in Arduino IDE:

• Adafruit_GFX
• Adafruit_GC9A01A

Select Arduino UNO and upload the code (Please send me a dm and I will reply asap with full code!)
 

Assembly:

• Mount the TFT in the case
• Glue the speaker under the top opening
• Install the rotary encoder and your 3D printed knob
• Secure the UNO inside
• Leave USB accessible

How It Works:

1. Set Study time
2. Set Break time
3. Set Cycles
4. Press to Start

LED turns on while running.
Sounds indicate transitions and completion.
Press during a session to return home.