SD SPI MISO sharing issue
i have been able sd card working fine arduino uno. have 165 shift register works fine. when use both @ same time, sd card no longer recognizable.
i have tried numerous things, cannot solved. if remove 165 shift register miso connection, , nothing else, sd card works fine.
has run problem before? appreciated.
i have tried numerous things, cannot solved. if remove 165 shift register miso connection, , nothing else, sd card works fine.
has run problem before? appreciated.
i buffer miso coming sd cards reason. use 1 gate of 74hc125, brings 5v level well. control oe of gate sd's chip select pin.
the 74hc165 does not have an oe/, sure use 74hc125 gate there chip select line.
the 74hc165 does not have an oe/, sure use 74hc125 gate there chip select line.
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