Counter
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lpatiny commented
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analogic multiplexer - CD74HC4067 * 3 : 7 pins for selection + 3 AD - http://www.ti.com/lit/ds/symlink/cd74hc4067.pdf
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QRE1113 emitter / receiver IR: 48
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CD54HC154 decoder - demultiplexer: 7 pins
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I2C : 2 pins
lpatiny commented
PCB was done and works correctly.