Search results for ""Author Douglas Brooks""
Artech House Publishers PCB Design Guide to Via and Trace Currents and Temperatures
A very important part of printed circuit board (PCB) design involves sizing traces and vias to carry the required current. This exciting new book will explore how hot traces and vias should be and what board, circuit, design, and environmental parameters are the most important. PCB materials (copper and dielectrics) and the role they play in the heating and cooling of traces are covered. The IPC curves found in IPC 2152, the equations that fit those curves and computer simulations that fit those curves and equations are detailed. Sensitivity analyses that show what happens when environments are varied, including adjacent traces and planes, changing trace lengths, and thermal gradients are presented. Via temperatures and what determines them are explored, along with fusing issues and what happens when traces are overloaded. Voltage drops across traces and vias, the thermal effects going around right-angle corners, and frequency effects are covered. Readers learn how to measure the thermal conductivity of dielectrics and how to measure the resistivity of copper traces and why many prior attempts to do so have been doomed to failure. Industrial CT Scanning, and whether or not they might replace microsections for measuring trace parameters are also considered.
£120.16
Penguin Books Ltd The Go-between
The moving exploration of a young boy's loss of innocence'The past is a foreign country: they do things differently there...'When one long, hot summer, young Leo is staying with a school-friend at Brandham Hall, he begins to act as a messenger between Ted, the farmer, and Marian, the beautiful young woman up at the hall. He becomes drawn deeper and deeper into their dangerous game of deceit and desire, until his role brings him to a shocking and premature revelation. The haunting story of a young boy's awakening into the secrets of the adult world, The Go-Between is also an unforgettable evocation of the boundaries of Edwardian society. It was adapted into an internationally-successful film starring Julie Christie and Alan Bates.Edited with an introduction and notes by Douglas Brooks-Davies'Magical and disturbing'Independent'On a first reading, it is a beautifully wrought description of a small boy's loss of innocence long ago. But, visited a second time, the knowledge of approaching, unavoidable tragedy makes it far more poignant and painful'Express
£9.04