To demonstrate how computers work, [Alex Gorischek] has made a physical example of how binary logic gates work using pulleys and weights. For anyone who doesn’t know much about logic gates (W… ...

By chaining these gates together, Mould successfully constructs a system that can add 4-digit binary numbers, showcasing the versatility and universality of logic gate principles.

It relies on what they term "seesaw" logic gates, which we've diagrammed below. The central feature of these gates is a stretch of DNA that can base-pair with many different molecules, allowing ...