iot-contact/pcb/power.kicad_sch, branch binary-descriptorsIoT device to check if doors and windows are closed or openhttps://cgit.xengineering.eu/iot-contact/atom?h=binary-descriptors2025-02-18T18:44:49Zpcb: Add hierarchical labels and connections2025-02-18T18:44:49Zxengineeringme@xengineering.eu2025-02-18T18:44:49Zurn:sha1:968d182429594578654a983d8a5b605f8f152650pcb: Set title to `iot-contact`2025-02-18T18:09:20Zxengineeringme@xengineering.eu2025-02-18T18:09:20Zurn:sha1:ca4bdaf956ac6a100cc386e6119641c35807becapcb: J3: Add non-PoE 5V power input header2025-02-15T21:09:18Zxengineeringme@xengineering.eu2025-02-15T21:02:25Zurn:sha1:60369177e1e9ad171d600d40e8438430e154e558
Power over Ethernet (PoE) has the disadvantage that GND is significantly
below earth. This requires that GND of a PoE-powered device is never
attached to earthed devices.
In production use cases this is no problem. The earth lines are
isolated.
Nevertheless for debugging it is sometimes useful to connect measuring
equipment like logic analyzers and oscilloscopes to the board. This is
not possible with PoE. Thus an alternative earth-based 5V power input is
useful.
pcb: Add sub-schematics2025-02-14T12:41:27Zxengineeringme@xengineering.eu2025-02-03T20:48:04Zurn:sha1:de8bc23e81c136b2153fe93d87e5a5ba9e518878