1. Live 2.25" ST7789 TFT Clock Simulator
MODEL: BLARE-C3-ST7789
DS3231 TCXO: 23.5 C | CR2032 OK
> I2C (0x68) DS3231 synced via Wi-Fi NTP | SPI (40MHz) ST7789 active
State: STATE_CLOCK_NORMAL | Alarm: 07:00 ON | Piezo PWM (D6): Idle
2. 3D Desk Enclosure & 92x54mm PCB Inspector
3. XIAO ESP32-C3 Pinout & BOM
| XIAO Pin | Net Name | Connected Subsystem |
|---|---|---|
| D0 / GPIO2 | BTN_SNOOZE | SW1 Tactile Switch (Snooze) |
| D1 / GPIO3 | BTN_ALARM | SW2 Tactile Switch (Alarm Mode) |
| D2 / GPIO4 | BTN_PLUS | SW3 Tactile Switch (Increment) |
| D3 / GPIO5 | BTN_MINUS | SW4 Tactile Switch (Decrement) |
| D4 / GPIO6 | I2C_SDA | DS3231 RTC Module SDA (0x68) |
| D5 / GPIO7 | I2C_SCL | DS3231 RTC Module SCL |
| D6 / GPIO21 | BUZZER_PWM | BZ1 12mm 85dB Piezo Transducer |
| D7 / GPIO20 | TFT_DC | ST7789 2.25" TFT Data/Command |
| D8 / GPIO8 | TFT_SCK | ST7789 2.25" TFT SPI Clock |
| D9 / GPIO9 | TFT_CS | ST7789 2.25" TFT Chip Select |
| D10 / GPIO10 | TFT_MOSI | ST7789 2.25" TFT SPI MOSI |
Bill of Materials (BLARE Kit)
| Ref | Qty | Component Description |
|---|---|---|
| U1 | 1 | Seeed Studio XIAO ESP32-C3 (Wi-Fi/BLE) |
| J1 | 1 | 2.25" ST7789 SPI TFT LCD (284x76 IPS) |
| U2 | 1 | DS3231 High-Precision I2C RTC + CR2032 |
| BZ1 | 1 | 12mm 85dB Passive Piezo Buzzer |
| SW1-4 | 4 | 6x6x7mm Omron Tactile Push Switches |
| H1-H4 | 4 | M2.5x8mm Screws + M2.5 Brass Inserts |