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STD PCF2129 / AT24C256 logger
Profile：Warning: not tested (yet) Logger board with RTC - PCF2129 + EEPROM - AT24C256 + 2032 battery holder
License: TAPR Open Hardware License
Description
Warning: not tested (yet)
Logger board with:
- RTC - PCF2129
- EEPROM - AT24C256 (selectable address, extracted as solder pads)
- 2032 battery holder
- basic I2C lines
- Qwiic (Sparkfun)/Easy C connector (e-radionica.com)/StemmaQT(3.3V)(Adafruit) connectors for I2C, with passthrough
- I2C pullups on board, with solder pads for enabling
- output pins for interrupt and clock
Design Drawing
schematic diagram
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PCB
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| ID | Name | Designator | Footprint | Quantity |
|---|---|---|---|---|
| 1 | GND | GND | FOOTPRINT PINHOLE | 1 |
| 2 | 3.3V | 3.3V | FOOTPRINT PINHOLE | 1 |
| 3 | SDA | SDA | FOOTPRINT PINHOLE | 1 |
| 4 | SCL | SCL | FOOTPRINT PINHOLE | 1 |
| 5 | A0G | CLOCK,INT | FOOTPRINT PINHOLE | 2 |
| 6 | PCF2129AT/2,518 | U1 | SOIC-20_L13.0-W7.6-P1.27-LS10.6-BL | 1 |
| 7 | JUMPER-PAD-2-NC_BY_PASTE | A0,A1,A2,PU | PAD-JUMPER-2-NC_BY_PASTE_YES_SILK | 4 |
| 8 | battery_holder_2032 | U3 | BATTERY_HOLDER_2032 | 1 |
| 9 | 4.7K | R1,R2,R3,R4,R5 | R0805 | 5 |
| 10 | SM04B-SRSS-TB (LF)(SN) | CN1,CN2 | CONN-SMD_4P-P1.00_SM04B-SRSS-TB-LF-SN | 2 |
| 11 | 1uF | C1 | C0805 | 1 |
| 12 | AT24C256C-SSHL-T | U2 | SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL | 1 |
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