Reverse-Engineering the Mechanical Bendix Central Air Data Computer

Before the era of digital electronic computers, mechanical analog computers were found everywhere. From the relative simplicity of bomb sights to the complexity of fire control computers on 1940s battleships, …read more Continue reading Reverse-Engineering the Mechanical Bendix Central Air Data Computer

Op-Amp Contest: Virtual Ball-in-a-Box Responds to Your Motions

A set of solderless breadboards with op amps and their functions annotated

With the incredible variety of projects submitted to our Op-Amp Contest, you’d almost forget that operational amplifiers were originally invented to perform mathematical operations, specifically inside analog computers. One popular …read more Continue reading Op-Amp Contest: Virtual Ball-in-a-Box Responds to Your Motions

The Modding, Restoration, and Demise of a $3M Analog Computer

How do you rapidly record the output from your three million dollar analog computer in the 1940s when the results are only available on analog meters? The team responsible for the Westinghouse 1947 AC Network Calculator at Georgia Tech was …read more

Continue reading The Modding, Restoration, and Demise of a $3M Analog Computer