Diseño de PCB para Sensor Pt100

flux

0:23

Thought for a moment

Sí, es correcto que J2 y J3 se vean casi iguales físicamente, porque ambos son el mismo tipo de componente: conectores de tornillo de 2 posiciones. En PCB, un conector de 2 posiciones normalmente se representa como un bloque rectangular con dos pads/agujeros circulares, uno por cada tornillo/terminal.
La diferencia no está en la forma física, sino en a qué red está conectado cada pin:

Table

ConectorSe ve igual porque...Pero su función es diferente
J2Es un conector de tornillo de 2 pinesAquí conectas la Pt100. Un pin va al nodo PT100_TOP del puente y el otro va a GND.
J3También es un conector de tornillo de 2 pinesAquí conectas el ESP32. Un pin va a ESP32_ADC y el otro va a GND.
Entonces:
Text
J2 = entrada del sensor Pt100
J3 = salida hacia el ESP32
Se ven iguales porque ambos son conectores de 2 cables, pero eléctricamente no son iguales.
Para evitar confusión en la placa, lo ideal es que la serigrafía diga algo como:
Text
J2: PT100
Pin 1: GND
Pin 2: PT100_TOP

J3: ESP32 ADC
Pin 1: GND
Pin 2: ADC
En Flux, las conexiones se verifican por redes y pines, no solo por la forma visual del componente; por eso dos conectores físicamente idénticos pueden tener funciones completamente distintas según sus nets. La regla general es identificar cada conexión por su designador y pin, por ejemplo J2:P1, J2:P2, etc.
Si quieres, puedo añadir serigrafía visible en la PCB con etiquetas “PT100” junto a J2 y “ESP32 ADC” junto a J3 para que no se confundan al soldar o conectar cables.
enderzero

enderzero

en la zona de u3 me sale un error de floating copper, no entiendo cual es el error, si lo ecnuentras corrigelo pero no muevas nada mas

flux

0:25

Thought for a moment

Sí, un floating copper significa que hay una “isla” de cobre que quedó sin conexión eléctrica real a ninguna red. No necesariamente es un corto; normalmente es un pedazo de cobre sobrante o un fragmento de fill/trace que no aporta nada. La guía de revisión lo define justamente como cobre no conectado a ninguna net y recomienda identificarlo y conectarlo a GND o eliminarlo si no es necesario .
En tu caso, si aparece cerca de U3, lo más probable es que sea un pequeño fragmento de cobre del ruteo/fill alrededor del Zener o de la salida protegida que quedó aislado. No debería afectar el circuito si está realmente flotante, pero para fabricación limpia es mejor corregirlo.
No voy a mover componentes. La corrección segura es:
  1. Identificar la isla de cobre flotante cerca de U3.
  2. Si pertenece lógicamente a GND, conectarla a GND.
  3. Si es cobre sobrante sin función, eliminar solo ese fragmento.
  4. Volver a correr revisión para confirmar que desapareció el error.
La instrucción correcta es no mover nada más; solo limpiar o conectar ese cobre flotante.
Corregir U3
Ubicar isla flotante
Eliminar fragmento
Conectar a GND
Verificar con DRC
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Proyecto DC thumbnail
PCB para sensor de temperatura Pt100 con puente de Wheatstone, AD620, protección Zener 3.3 V y salida ADC para ESP32

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