Hello, I'm starting with module ov7670 and looking at the examples of this module with the Arduino, I see that it uses many ports. Does anyone know a solution that uses a multiplexer to save the use of ports?
I would seriously considering dedicating an UNO to the camera, they are very inexpensive. If you want to use a multiplexer you might want to do some research on basic electronics and see what they actually do. I would recommend you research port expander(s) such as a PCF8574 or other variations both 8 and 16 bit.
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