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Worked for 13 mins 7 sec
Selesai: board sudah dikecilkan menjadi 176 × 44 mm, routing lama yang bermasalah sudah dibersihkan, lalu PCB di-route ulang tanpa mengubah netlist/fungsi rangkaian.
Verifikasi akhir menunjukkan tidak ada DRC warning/error terbuka untuk airwire, dangling trace, overlap copper/trace, invalid layer, dan trace corner.
Catatan: tinggi board saya naikkan dari percobaan 36 mm ke 44 mm karena pad U2 terpotong jika terlalu kecil.
Catatan: tinggi board saya naikkan dari percobaan 36 mm ke 44 mm karena pad U2 terpotong jika terlalu kecil.
bagian ijo layoutnya di kecilkan yang kanan sesuai dengan pin oled
Thought for 15 sec
Saya akan kecilkan sisi kanan board agar tepi PCB lebih dekat ke pin/connector OLED1, lalu cek ulang apakah ada pad yang terpotong dan DRC tetap bersih.
Worked for 9 mins 57 sec
Selesai: sisi kanan board sudah dikecilkan mengikuti area pin/connector OLED1. Ukuran PCB sekarang 144 × 44 mm dari sebelumnya 176 × 44 mm.
Saya juga route ulang PCB setelah perubahan outline, dan verifikasi akhir menunjukkan tidak ada DRC error/warning terbuka untuk airwire, dangling trace, overlap copper/trace, invalid layer, dan trace corner.
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PCB Pinout and Power Notes — XIAO ESP32-S3 Smart Glasses
Board Summary
- Main PCB shape: elongated rounded rectangle, 110 mm × 38 mm.
- Stackup: Standard 4 Layer.
- Main controller: Seeed Studio XIAO ESP32S3.
- Power source: single-cell Li-ion 3.7 V 200 mAh through TP4056 charger module and slide switch.
GPIO Pin Mapping
Table
| Function | XIAO ESP32-S3 Pin | Net | Connected Module |
|---|---|---|---|
| I2C SDA | GPIO5 / SDA / D4 | I2C_SDA | OLED SDA |
| I2C SCL | GPIO6 / SCL / D5 | I2C_SCL | OLED SCL |
| I2S BCLK | GPIO7 / SCK / D8 | I2S_BCLK | INMP441 SCK + MAX98357 BCLK |
| I2S mic data input | GPIO8 / MISO / D9 | I2S_MIC_DOUT | INMP441 SD |
| I2S amp data output | GPIO9 / MOSI / D10 | I2S_AMP_DIN | MAX98357 DIN |
| I2S LRCLK / WS | GPIO44 / RX / D7 | I2S_LRCLK | INMP441 WS + MAX98357 LRC |
| Touch input | GPIO1 / A0 / D0 | TOUCH_OUT | TTP223 I/O |
| Potentiometer ADC | GPIO2 / A1 / D1 | POT_ADC | RV1 wiper |
Power Connections
Table
| Net | Source | Loads |
|---|---|---|
| BATT+ | Battery connector J1 P1 | TP4056 BAT+ |
| GND | Battery negative / system ground | All modules |
| VBAT_RAW | TP4056 OUT+ | Slide switch COM |
| VBAT_SW | Slide switch output | XIAO 5V pin, MAX98357 Vin |
| 3V3 | XIAO 3V3 pin | INMP441, TTP223, OLED, potentiometer high side, MAX98357 SD |
Important Power Note
The current schematic follows the simplest module-based architecture: TP4056 output is switched to the XIAO 5V/VIN-side input and MAX98357 Vin. Because TP4056 output follows the Li-ion battery voltage, the XIAO input behavior should be verified on hardware. If the XIAO 5V pin requires a true 5 V input for reliable regulation, add either:
- a small Li-ion to 5 V boost converter before XIAO 5V, or
- use the XIAO's official battery pads/connector if available in the exact board footprint.
Power Budget Estimate
Table
| Load | Typical | Peak / Note |
|---|---|---|
| XIAO ESP32-S3 WiFi/BLE | ~80–240 mA | peaks can approach ~500 mA during RF bursts |
| OLED 0.96 in | ~10–25 mA | depends on brightness |
| INMP441 | ~1–2 mA | digital mic |
| TTP223 module | <5 mA | usually very low |
| MAX98357 + 8Ω speaker | variable | can exceed 300 mA at high volume |
Battery life with a 200 mAh cell will be short if WiFi and speaker are active. Expect roughly 30–90 minutes depending on audio volume, display brightness, and wireless duty cycle.
Mechanical Notes for Glasses
- Put the speaker side near the ear.
- Keep microphone acoustic port open; do not cover it with frame plastic.
- Keep XIAO antenna at the outside edge; avoid copper, battery, or metal frame near the antenna end.
- OLED 0.96 inch is physically large for glasses; if the frame is too bulky, use a smaller display or remove the OLED for a simpler wearable.
Board Summary
GPIO Pin Mapping
Power Connections
Important Power Note
Power Budget Estimate
Mechanical Notes for Glasses
