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.
When I got the news that I was going to be a father of a baby girl I thought that maybe I could get out of redecorating the baby’s room if I embarked on a special project under the house. The idea of building a cradle boat was inspired by photos in an old magazine so I went bought a copy of The Expectant Father’s Cradle Boat Book. But the boats were either very basic or so intricate I’d be lucky to finish it in time for her 21st birthday.
FOR A SPECIAL piece of wood craft in the home, a smoothly finished bowl with its rough natural bark retained on the rim will always have extra appeal. The best timber for this kind of bowl is any fruit tree, the flowering cherry tree, olive tree or any tree with not too thick bark. Pohutukawa is a good wood, but the bark is fragile.