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A functioning counting circuit. While the space between the IR LED and the IR Phototransistor is unblocked the number stays. When blocked, it increments by one.
by lucasmoten | updated May 20, 2012
A possibly complete light sensitive counting circuit with 3 digits making use of 311, 7414, 7490, and 7447 ICs and 7-segment displays.
by lucasmoten | updated May 15, 2012
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