tinta
c0de111
Battery-powered e-paper sign that runs for over a year on alkaline cells: room signage, sensor graphs, home automation, or anything over Wi-Fi. Wakes by real-time clock, NFC tap, or button. Raspberry Pi Pico W firmware, custom PCB, and 3D-printed case included.
Components (28)
| Reference | Value | Description |
|---|---|---|
| Q1,Q3 | 2602 | TSM260P02CX |
| Q2,Q4 | 3904 | MMBT3904 |
| U2 | BMP581 | |
| U4 | RV-3028 | Realtime Clock/Calendar I2C Interface, Extreme Low Power, 1.1 V to 5.5 V, MicroCrystal C7, RV-3028-C7 |
| U5 | ST25 | Dynamic NFC/RFID tag IC with I2C and RF interface, ST25DV04KC-IE6S3 |
| BT1 | Coin Cell (RTC Backup) | |
| C1 | 22nF | |
| C2-C8,C10,C13 | 100nF | NFC VCC decoupling,NFC V_EH capacitor,decoupling |
| C9 | 4.7uF | NFC VCC bulk capacitor |
| C11 | 10pF | NFC AC matching capacitor |
| C12 | JZ400 | NFC AC trimmer capacitor |
| D1-D8,D10,D11 | BAT54J | 30V 200mA Schottky diode, SOD-323F |
| D12 | 1N4148 | 75V 0.15A Fast switching Diode, SOD-323 |
| J1 | connector epaper | |
| J2 | antenna | Generic connector, single row, 01x02, script generated |
| J3 | Battery 3xAA/AAA | |
| J6 | pushbuttons | Generic connector, single row, 01x05, script generated |
| J7 | status LED | |
| pico1 | SC0918 | |
| R1 | 1M | |
| R2,R13-R16,R21 | 1k | |
| R3,R22 | 50k | |
| R4,R5,R17,R18 | 200k | |
| R6,R7 | 4k7 | |
| R8-R11 | 10k | |
| R12 | 220R | |
| R19 | 2M2 | |
| R20 | 22R |