Elektor July/August 2012

	Download this magazine
	85 Elektor Credits

Table of Contents Elektor July/August 2012

• ‘Green’ Solar Lamp
  
• 16 Ways to Switch your AC Power On
  
• A Zero Current Switch
  For inductive Loads
• Arduino LC’Deed
  Control a display using a (virtual) serial port
• Arduino on Course (1a)
  Part 1a: Welcome & Arduino 8-bit sound generation
• ATtiny Goes Wireless
  
• AVR MultiTool
  Measure, control, experiment
• Battery Maintainer
  
• Bicycle Rear Light
  one super LED and 10 components last 5 minutes
• Bulb-2-LED Bicycle Light Conversion
  
• Chateau Rising Damp
  An ATM18 hygrometer
• DC Protection for Speakers
  
• Economical 7-segment Display
  
• Elex Board Layout in LochMaster
  
• Equipment ‘ON’ Counter for 68 Years Max.
  
• EUC Penta-Hexadoku
  Puzzle with an electronics touch
• EZ-SMD OpAmp Tweaker Board
  
• FET Radiation Meter
  
• Gee Whiz, a GPIB-to USB Converter
  $50 interface circuit brings 80s/90s edebris to life
• Goodbye Standby
  
• I’ve Got the USB Power
  But how much in milliamps?
• Knitting Counter
  
• Laser Projection with Arduino
  
• LC Oscillator with Pot Tuning
  
• LED Garland Controller
  All the colours of the rainbow
• LED-LDR Ring Oscillator
  
• Lengths Counter for Swimmers
  An example application using speech synthesis, an accelerometer, and a magnetometer
• Loudspeaker Resonant Frequency Meter
  For laptop or PC
• Mini Stroboscope
  
• Mini-Mute
  Kill noisy TV commercials with one stroke
• MOSFET Circuit Breaker
  
• Noisy LEDs
  Simple generation of complex sound effects
• One-transistor Voltage Converter
  
• OPA660: Diamonds are not forever
  Component Tips series
• Power LED Driver
  
• Pt100 Simulator
  
• Room for a Small One?
  
• Same PCB Shoots Again!
  A thermometer with an unusual readout
• Shoo Heron!
  Outsmart a clever bird
• Smoke Alarm Power Supply
  Simply but effective
• Soft AC Line Start
  
• TAPIR Sniffs it Out!
  Ultrasensitive wideband E-smog detector
• The Maze of the Lost Electronics Technician
  
• The Renesas RL78 Ecosystem
  Design with the power of partnership
• Tiny Compass
  
• Two-Transistor Regenerative Receiver
  
• Universal Measurement Amplifier / Attenuator
  For laptop or PC
• USB Control Board
  USB-to-LPT bidirectional adapter
• Voltage Inverter using a 555