By Mark Frauenfelder

ISBN-10: 0596527187

ISBN-13: 9780596527181

Should you wish to tweak, disassemble, recreate, and invent cool new makes use of for expertise, you will love MAKE, our project-based quarterly for the inquisitive do-it-yourselfer. MAKE quantity 07 is the yard Biology factor, with DNA extraction, plant grafting, domestic mycology lab, snail cryogenics, and extra. additionally, easy methods to make your personal Stirling engine, set up a video digicam on a version rocket, make a head-mounted water cannon, and dozens of alternative tasks to satiate your internal maker.

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Extra resources for Make, Volume 7: Technology on Your Time

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In the case of overloading) without affecting the whole system, with simple circuitry • both linear and rotational actuators available • flexibility for interconnection of various fluidic components • low maintenance cost Disadvantages of the hydraulic drives are as follows: • not readily available, compared to electric power • costly and complicated installation, compared to mechanical or electrical system Even when fluidic drives have been selected as the driving mechanisms, there are considerations in choosing whether to use hydraulics or pneumatics based on their characteristics.

Modern trains are now powered by electrical drives, while cars employ electric drive components to enable basic and advanced functions. Household appliances also employ electric drives to fulfill a wide range of functions, from simple functions in electric shaver to more complicated functions necessary in an automatic washing machine. Until today, electric drives have evolved in a significant way from what they were some 50 years ago. They are no longer constructions of windings and magnet that rotate when activated by electrical power; they are now equipped with controllers and converters that allow them to perform very precise functions almost independently.

This is applied, for example, in a hydrostatic transmission, where manual controller is replaced by a potentiometer. Proportional control valves are now commonly applied in the industries associated with material handling, construction equipment, and steel mill. 4 Servo Control Valve A servo control valve produces continuous controlled output via feedback control loop, as it implements a closed-loop control system. The reference signal is compared to the actual output and is used to generate control signal, resulting in a precise positioning of the valve according to the reference signal.

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Make, Volume 7: Technology on Your Time by Mark Frauenfelder

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