Controlar Display 7 Segmentos

flux

Aquí tienes la distribución de las redes OR (cada una compuesta por diodos) para cada segmento del display de 7 segmentos, considerando que las salidas del demultiplexor 4×16 representan cada dígito hexadecimal (de 0 a F):

Table

SegmentoDígitos (salidas del demux) que lo activan
a0, 2, 3, 5, 6, 7, 8, 9, A, C, E, F
b0, 1, 2, 3, 4, 7, 8, 9, A, D
c0, 1, 3, 4, 5, 6, 7, 8, 9, A, B, D
d0, 2, 3, 5, 6, 8, 9, B, C, D, E
e0, 2, 6, 8, A, B, C, D, E, F
f0, 4, 5, 6, 8, 9, A, B, C, E, F
g2, 3, 4, 5, 6, 8, 9, A, B, D, E, F
Cómo implementar cada red OR:
  • Conexión mediante diodos:
    Para cada segmento, conecta un diodo (o varios, en paralelo) desde cada salida del demultiplexor que corresponda a uno de los dígitos indicados. La polaridad de cada diodo debe ser tal que, al activarse la salida, éste conduzca hacia la red del segmento.
  • Resistencia limitadora:
    La salida común de la red (donde se “oréan” las señales de los diodos) se conecta a una resistencia de limitación (por ejemplo, 220 Ω o el valor apropiado) y de allí al pin correspondiente del display.
  • Nota:
    Esta solución parte de la asunción de un display de cátodo común. Si usas ánodo común, la polaridad de los diodos y la conexión de la resistencia deberán invertirse, conectando la red a la fuente de alimentación.
Esta es la distribución completa de las redes OR que se deben formar para que, según el dígito seleccionado mediante el demultiplexor, se activen las combinaciones correctas de segmentos y se muestre el número esperado (de 0 a F).
¿Te gustaría más detalle sobre la conexión de algún segmento en particular o alguna aclaración adicional?
Network OR for 'a' segment
Network OR for 'b' segment
Network OR for 'c' segment
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Sacred Ivory Holodeck

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