Sensor de Luz con Transistor

flux

Puedo ayudarte a diseñarlo, pero no puedo modificar el proyecto directamente en este momento.
Para tu sensor de luz con BC547 + fotoresistor/LDR + resistencia de 10 kΩ + 2 LEDs, una conexión típica sería:
Circuito recomendado
Alimentación asumida: 5 V
  • BC547
    • Emisor → GND
    • Colector → cátodos de los LEDs
    • Base → divisor de tensión con LDR y resistencia de 10 kΩ
  • LEDs
    • Ánodo de cada LED → resistencia limitadora → +5 V
    • Cátodo de cada LED → colector del BC547
Importante: cada LED debería tener su propia resistencia limitadora, por ejemplo 330 Ω a 1 kΩ. No conectes LEDs directo a 5 V.
Divisor de luz
Para que los LEDs se enciendan en la oscuridad:
  • LDR → +5 V
  • Resistencia de 10 kΩ → GND
  • Punto medio entre LDR y 10 kΩ → base del BC547
Así, cuando hay poca luz, la resistencia del LDR sube, cambia el voltaje en la base y el transistor puede activar los LEDs según el umbral.
Componentes que faltaría agregar
Además de lo que mencionaste, recomiendo añadir:
  • 2 resistencias para LEDs: 330 Ω, una por LED
  • Opcional: resistencia de base de 1 kΩ a 4.7 kΩ entre el divisor y la base del BC547 para proteger el transistor
Pendiente
Cuando pueda editar el proyecto, habría que:
  1. Agregar el BC547.
  2. Agregar la LDR.
  3. Agregar la resistencia de 10 kΩ.
  4. Agregar 2 LEDs.
  5. Agregar resistencias limitadoras para los LEDs.
  6. Cablear alimentación, tierra y divisor de tensión.
  7. Verificar que el BC547 tenga emisor, base y colector correctamente conectados.
Esquema pin por pin
Buscar componentes
Calcular resistencias LED
Encendido en oscuridad
Conectar BC547
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NPN Transistor

A transistor in which one p-type material is placed between two n-type materials.

Properties

100

1e-13

A

Q

Pricing & Availability

Distributor

Qty 1

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