2 layers34.2 × 19 mm
Boards using the PCF2131TFY
3 boardsBoards in 3 GitHub repositories, designed in KiCad, that use the PCF2131TFY by NXP Semiconductors (-40℃~+85℃ 1.2V~5.5V 64nA Built-in SPI、I2C Watchdog timer、Temperature compensation、Backup power management and battery charging、Battery low voltage detection、Timestamp function、Programmable clock output、Alarm function、Locking and tamper-proof、Periodic interrupt output Yes HLSON-16(3.5x4.5) Real Time Clocks ROHS). See how each wires it, with its parts, size, README and files; the PCF2131TFY’s symbol, footprint and pinout are on its own page.
- 4 layers62 × 105 mm
PT100 Datalogger
rasusmilch/PT100_Mesh_Datalogger
This application turns an ESP32-S3 N8R2 into a UTC-centric PT100 data logger with FRAM-first buffering, SD-card CSV batching/verification, DS3231 RTC support, mesh streaming, and serial-console calibration.
139 parts - 4 layers90 × 60 mm
Better lamp controller
super-cow-powers/better-lamp-controller
A custom lamp controller with audio, controlled with an RP2040
103 partsBSD-3-Clause