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Country Club Dr., Mesa, AZ 85210 800-528-1417 // 480-464-2485 // FAX: 480-464-5824 Circle #106 on the Reader Service Card. Page 3.qxd 10/6/2004 11:12 AM Page 3 Announcing...Our New Expanded Website! ♦ Over 6000 items...and growing! Laptop Floppy Drive ♦ Wide selection of standard and #20180 $14.95 WWW.GiURUMELE.Hi2.RO Internet TV Appliance! hard to find components #2002 $29.95! ♦ Dozens of distributor product lines Dot Matrix Display WWW.RADiOSCAMATORUL.Hi2.RO ♦ Best values on almost anything electronic! #19429 $8.00 ♦ Tons of surplus bargains!! 40x2 LCD Module #20298 $9.50! ♦ Corporate, Government & University POs welcome. ♦ Three retail outlets, World-Wide Shipping. ♦ Test Equipment bargains too! 200W Power Supply #19267 $10.00 150W Power Supply #19266 $8.00 80W Power Supply #18415 $5.00! Pixie2 QRPp Xcvr! #Pixie2 $9.95! #crystalpak $14.95! Since 1963!... Silicon Valleys Electronic Marketplace 3 Retail/Wholesale Locations: Order Toll-Free: 1-800-4-HALTED(442-5833) Look For Main Office - Mail Orders... Us! on... or...ONLINE, AT: www.halted.com 3500 Ryder St. Santa Clara, CA 95051 Terms: Some quantities limited; all items are subject to prior sale. Minimum order: $10.00 Santa Clara 1-408-732-1573 plus shipping. Orders under $20.00 subject to $2.00 handling fee,in addition to shipping. All keyword: orders shipped by UPS Surface unless otherwise specified. $6.00 UPS charge added for Sacramento 1-916-338-2545 hscelectronicsupply COD. Visit our website for detailed information on domestic and international shipping Rohnert Park 1-707-585-7344 methods. NOVEMBER 2004 Circle #72 on the Reader Service Card. 3 TOC.qxd 10/11/2004 2:54 PM Page 4 Vol. 25 No. 11 PROJECTS and FEATURES COLUMNS 40 AM RADIO TRANSMITTER 54 MULTI-PROTOCOL USB 8 MICRO MEMORIES Turn your boombox into a Home automation with FFTs. Exploring The Third Wave. portable PA system. by Don Powrie by Paul Florian WWW.GiURUMELE.Hi2.RO 14 TECHKNOWLEDGEY 2004 60 REMOTE TEMP LOGGER Tiny flying robots; artifical 42 AUTOMATIC A/V SWITCHER Read remote temperatures over molecules; jumbo LEDs; and Become the ultimate couch potato! the phone lines. more. by Mike Gardi by Al Williams WWW.RADiOSCAMATORUL.Hi2.RO 24 Q&A 48 WEB ENABLED X-10 HOME 69 PCB LAYOUT TIPS Homemade thermocouples; AUTOMATION Optimize your next PCB order CHU receivers; OBD II; and CONTROLLER with these tips. more. Build this circuit to manage your by Jeff Johnson home electronics through a web browser. 76 STAMP by Brian Murtha Revisiting I2C. 83 IN THE TRENCHES Generalization versus specialization. NOVEMBER 2004 88 LET’S GET TECHNICAL Discovering data compression, p. 42 part two. 94 NEAR SPACE p. 48 Hack a PenCam for near space applications. p. 94 p. 54 DEPARTMENTS 105 Advertiser’s Index p. 69 66 Classified Display Ads 18 Electro-Net 36 Electronics Showcase p.