Elektor July 2002

Table of Contents Elektor July 2002

• VCP-2002 Video Copy Processor
  for DVD, S-VHS and VHS
• Simple IrDA Receiver
  
• Waking to Music
  
• Audio Limiter
  for DVD
• 4-Bit Decimal Display
  
• Filter for Audio Limiter
  for DVD
• Joystick Replacement
  
• Mains Remote Transmitter
  
• Mains Remote Control: Decoder
  
• Mains Remote Control: Encoder
  
• Mains Remote Switch
  
• Modem Line Protection
  
• 300-3000 MHz RF Detector
  
• AM Demodulator for Intercom
  
• AM Modulator for Intercom
  
• 5-MHz Active Lowpass Filter
  
• Lithium-Ion Charger
  
• 2-Component Hartley Oscillator
  
• Audio Switchbox
  
• Fan Monitor
  
• Overvoltage Protection
  
• LED Flashlight
  
• On/Off Timer
  
• I2C Hotswap
  
• Level Shifter
  
• Low-Drop Current Source
  
• Fourfould Voltage Monitor
  
• Supply Sequencer
  
• Lithium Torch
  
• NiCd/NiMH Battery Charger
  
• Keyboard/Mouse Changeover Switch
  
• Battery Voltage LED
  
• Telephone Watchdog
  
• Simple Infrared Light Barrier
  
• 60-dB LED VU Meter
  
• Active Band-Pass Filter up to 5 MHz
  
• Low-cost Position Sensor
  
• Chip Tuning
  Engine Management Tweaking
• Multi-Position Mains Switch
  
• Pushbutton Switch
  
• Memory Expansion for Futaba R/C Transmitters
  
• Audio Combiner
  
• Mini Audio DAC
  
• Digital Transformer
  
• Constant Voltage
  
• DSP Filter Primer
  a practical example of Digital Signal Processing
• Compass Sensor for Lego RCX
  never get lost again
• Directional Microphone
  for ‘softer’ instruments
• Distance Measurement using Infrared
  with a new proximity sensor module
• Two Keyboards on one PC
  
• Treasure Chest using Relays
  
• 3-dB Chebyshev Filter/ Amplifier
  
• Super Simple NiCd/NiMH Charger
  
• Optical CD-ROM Output
  
• Elektor Electronics USB Inter-face under Linux
  
• GSM Modem
  
• Audio Input Selector
  
• Simple IrDA Transmitter
  
• Economical White LED
  
• Direct Current Dimmer
  
• LED Voltage Tester
  
• Instrumentation Amplifier
  with an electrically isolated input
• QV381m0 Record/Playback Module
  meets the Basic Stamp 2