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contents <strong>Mar</strong>ch <strong>2013</strong> pulse 14 Self-contained RF recording system weighs less than 10 lbs 16 Dash-cam video: benefit or distraction? 18 Time-of-flight proximity sensor allows new smartphone-user interactions 18 Motor-control solution simplifies field-oriented-control designs departments & Columns 63 Dilbert 16 9 EDN online: Join the conversation; Content; Engineering community 12 EDN.comment: Pick your favorite contributor; winner gets $5000! <strong>22</strong> Signal Integrity: Measuring shadows 24 Connecting Wireless: Another radio, another set of apps 26 Teardown: Cell-phone charger: nice idea done right 28 Mechatronics in Design: Angular velocity is often misstated 60 Supply Chain: Automotive electronics’ supply-chain impact; Fewer IC suppliers to hold more of <strong>2013</strong> market 63 Product Roundup: Test & Measurement 19 Will <strong>2013</strong> bring tighter power-supply efficiency requirements? 19 Smaller Raspberry Pi costs under $25 20 Voices: Peter Spitzer: Motivated by testing, challenges, and constant learning 66 Tales from the Cube: Resolving a simulation complication 66 EDN® (ISSN# 0012-7515) is published monthly by UBM Tech, 600 Community Drive, Manhasset, NY <strong>11</strong>030-3825. Periodicals postage paid at Manhasset, NY, and at additional mailing offices. SUBSCRIPTIONS—Free to qualified subscribers as defined on the subscription card. Rates for nonqualified subscriptions, including all issues: US, $150 one year; $250 two years; $300 three years. Except for special issues where price changes are indicated, single copies are available for $10 US and $15 foreign. For telephone inquiries regarding subscriptions, call 847-559- 7597. Email: edn@omeda.com. CHANGE OF ADDRESS—Notices should be sent promptly to EDN, PO Box 36<strong>09</strong>, Northbrook, IL 60065-3257. Please provide old mailing label as well as new address. Allow two months for change. NOTICE—Every precaution is taken to ensure accuracy of content; however, the publishers cannot accept responsibility for the correctness of the information supplied or advertised or for any opinion expressed herein. POSTMASTER—Send address changes to EDN, PO Box 36<strong>09</strong>, Northbrook, IL 60065-3257. CANADA POST: Publications Mail Agreement 40612608. Return undeliverable Canadian addresses to APC, PO Box 503, RPO West BVR CRE, Rich Hill. ON L4B 4R6. Copyright <strong>2013</strong> by UBM. All rights reserved. Reproduction in whole or part without written permission is prohibited. Volume 58, Number 3 (Printed in USA). [ www.edn.com ] Surface Mount (and Plug In) Transformers and Inductors See Pico’s full Catalog immediately www.picoelectronics.com Low Profile from .19"ht. Audio Transformers Impedance Levels 10 ohms to 250k ohms, Power Levels to 3 Watts, Frequency Response ±3db 20Hz to 250Hz. All units manufactured and tested to MIL-PRF-27. QPL Units available. Power & EMI Inductors Ideal for Noise, Spike and Power Filtering Applications in Power Supplies, DC-DC Converters and Switching Regulators Pulse Transformers 10 Nanoseconds to 100 Microseconds. ET Rating to 150 Volt Microsecond, Manufactured and tested to MIL-PRF-21038. Multiplex Data Bus Pulse Transformers Plug-In units meet the requirements of QPL-MIL-PRF 21038/27. Surface units are electrical equivalents of QPL-MIL-PRF 21038/27. DC-DC Converter Transformers Input voltages of 5V, 12V, 24V And 48V. Standard Output Voltages to 300V (Special voltages can be supplied). Can be used as self saturating or linear switching applications. All units manufactured and tested to MIL-PRF-27. 400Hz/800Hz Power Transformers 0.4 Watts to 150 Watts. Secondary Voltages 5V to 300V. Units manufactured to MIL-PRF-27 Grade 5, Class S (Class V, 155 0 C available). Delivery-Stock to one week for sample quantities in NY call 914-738-1400 Fax 914-738-8<strong>22</strong>5 PICO Electronics, Inc. 143 Sparks Ave. Pelham, N.Y. 10803 E Mail: info@picoelectronics.com www.picoelectronics.com
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