Electronics

Installing an automatic gate

When Karl Bishop had finished fixing and painting the fence on his newly acquired house he knew he needed to finish it with a gate. A gate would allow the dog to roam safely and it would add an element of security.

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Gantry crane for model railway

STEPPER MOTORS are to conventional DC motors as computers are to calculators – in other words, much moresophisticated. The ability of stepper motors to specify rotation precisely both by velocity and angle opens new doors for movement control. The downside is that to get the most out of these little beauties, you need ancillary digital-pulse control circuits, a fact which may deter some sheddies from exploiting their numerous advantages.

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