Elektor February 2010

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Table of Contents Elektor February 2010

• Audio amplifier in dinner mint format
  Design Tip
• Battery Checker
  One to ten cells, up to 10 A
• Blinded by the Light?
  Lamp PFC investigated
• Capacitors to the rescue
  E-Labs Inside section
• Computer digital audio interface
  Design Tip
• Elektor Teletext Decoder (1981)
  Retronics series
• Femto OS
  A tiny multitasking operating system for microcontrollers
• Hexadoku February 2010
  Puzzle with an electronics touch
• Loud and Clear
  A portable sound system with feedback suppression
• Mailbox February 2010
  
• Motorbike Chain Oiler with PIC
  Reader Circuits
• PCB design—it’s not witchcraft!
  E-Labs Inside section
• Stable Starting Points
  An introduction to electronic power supplies
• Tailored Cooling
  Online help for heatsink dimensioning
• The 2.4 GHz Bandalyser
  See what’s happening on the band
• The ATM18 Radio Computer
  Using the SI4735 DSP radio chip
• The loudest!
  E-Labs Inside section
• Torture Rack
  Dynamic testing of power supplies using simple tools
• TTL Bluetooth Dongle
  Wireless data comms made easy
• Winamp Controller
  Winamp control unit with motorised potentiometer and USB interface