Through some experimentation he figured out that a XOR gate shows some analog properties. By modulating the input between 0.8v and 1.2v the output was swinging between 1v-4v, making the logic IC a preamplifier with a gain of 7.5. You can check out his circuit in action below.
Via the forum.
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on Friday, October 21st, 2011 at 7:35 am and is filed under 7400 contest.
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