Everyday Practical Electronics №7 2013г

Projects and Circuits
10 DIGITAL SOUND EFFECTS MODULE
     by Nicholas Vinen
     This inexpensive, compact moduJe can play up to eight

     different sound effects
24 USB STEREO RECORDING & PLAYBACK INTERFACE
     by Jim Rowe
     Make Ngh-Quality audio recordings on your PC using

     balanced mic inputs
40 VACUUM PUMP FROM JUNK
     by Neno Stojadmovic
     Recycle It! special - make a serious vacuum pump for next

     to nothing
44 MINIREG 1.3-22V ADJUSTABLE REGULATOR
     by John Clarke
     This compact regulator produces fully regulated DC ranging

     from 1.3V to 22V at currents up to 1A
52 INGENUITY UNLIMITED
     Wmd-up flashlight. Let there be light!
Series and Features
22 TECHNO TALK by Mark Nelson
     Deja vu
36 COMPUTER ERROR: RELIABLE DIGITAL PROCESSING

     PART 2
     by William Marshall
     Valves give way to transistors and computers go into space
41 CIRCUIT SURGERY by Ian Bell
     Filters ana frequency response
56 PRACTICALLY SPEAKING by Robert Penfold
     Getting started w th test gear
60 MAX'S COOL BEANS by Max The Magnificent
     Radiation and silicon chips... Triple modular redundancy
66 NET WORK by Alan Winstanley
     On the Tube... Footage galore.. A Streetview Named

     Desire... Searching for Glass...
Regulars and Services

7  EDITORIAL
    How to kick start your electronics business
8  NEWS - Barry Fox highlights technology's leading edge
    Plus everyday news from the world of electronics
21 MICROCHIP READER OFFER
    EPE Exclusive  Win an LCD Explorer Development Board
23 EPE BACK ISSUES Did you miss these?
39 Subscribe то EPEand save money
59 READOUT - Matt Pulzer addresses general points arising
62 CD-ROMS FOR ELECTRONICS
    A wde range of CD-ROMs for hobbyists, students and

    engineers
68 DIRECT BOOK SERVICE
    A wiae range of technical books available by mail order, plus more

    CD-ROMs
70 EPE PCB SERVICE
    PCBs for EPE projects
71 ADVERTISERS INDEX
72 NEXT MONTH! - Highlights of next month's EPE