Elektor July 2001

Table of Contents Elektor July 2001

• 12-to-24 V Converter
  
• 2.5-GHz Signal Source
  
• AC Controller using MOSFETs
  
• Active PC Loudspeaker
  
• Alignment-free FM Detector
  
• Alternating Blinker
  
• Ammeter
  
• Battery Juicer
  
• Baudrate Divider Calculator for AVR Micros
  
• BITBUS Monitor
  
• Booster for Cable Radio
  
• Clap Activated Switch
  
• Computer Off = Monitor Off
  
• Dual High Side Switch Controller
  
• Dual Switching Regulator
  
• ECC86 Valve Radio
  
• Economical Timebase Calibrator
  
• Electrically Isolated RS232 Adapter
  
• EMD-immune Electronic Doorbell
  
• Fairy Lights
  
• Fan Control IC with Overtemperature Output
  
• Fuse Failure Indicator
  
• Gain and Phase Meter
  
• Graphical Compiler for the MCS-51 Microcontroller
  
• Graphs in Excel
  
• High Voltage Converter: 90 V from 1.5 V
  
• I2C Interface for RS232 Port
  new lease of life for the COM Port
• Infrared Remote Control for PCs
  using the RC5 code
• Integrated Voice Memory
  a novel decoration not just for Christmas time
• Introduction to TCP/IP and Embedded Internet (2)
  programming tips for TCP/IP stacks in webservers
• Key Scanning with a Small Number of Connections
  
• Keyboard/Mouse Switch Unit
  
• Keypad Encoder IC with Serial Output
  
• LED-LDR Blinker
  
• Li-Ion Protection Circuit
  
• Lithium-Ion Charger (2)
  
• LM 3822/24 Current Meter
  
• Low-Cost Temperature Measurement with a Microcontroller
  
• More Power and Performance from the Parallax BASIC Stamp
  meet the BS2p!
• Opentherm Monitor
  
• Output Cutoff for Step-Up Switching Regulator
  
• Parallel Opamps
  
• Piezo Amp
  
• Pulse Edge Visualiser
  
• Pulse Selector
  
• Pump Protector
  
• Quizmaster
  the 1-wire model
• Radio Controlled Clocks
  a peek under the bonnet
• Random Flashing LED
  
• Rotary Encoder for Digital Volume Control
  
• S/PDIF-to-TTL-Converter
  
• SDCC (Small Device C Compiler)
  
• Secret lock
  
• Simple Adapter for SB Live! Player 1024
  
• Simple EEPROM Programmer
  
• Simple IR Receiver
  
• Simple IR Transmitter
  
• Simple Remote Control Tester
  
• Squarewave Oscillator Using TLC073
  
• Step-up Switching Regulator with Integrated Current Limit
  
• Step-Up/Step-Down Switching Regulator
  
• SW Converter for AM radio
  
• SW Converter for Digital AM Car Radio
  
• Switchable Crystal Oscillator
  
• Switchbox for Loudspeakers/Amplifiers
  
• Switched-Capacitor Fifth-Order1 Hz to 45 kHz Low-Pass Filter
  
• Switching Amplifier for Analogue Signals
  
• Temperature Sensor with Single-Wire Digital Interface
  
• Three-component Oscillator
  
• Towards low Power Everyday Electronic Systems
  Low Power Microelectronics, why and how?
• Transistor Tester
  
• Very Wideband PC Radio
  
• VGA-to-BNC Adapter
  -
• VHF Test Transmitter
  
• Video Line Driver
  
• Voltage Regulator Assistant
  
• Wideband Waveform Generator
  
• Wire Tracer (Receiver)
  
• Wire Tracer (Transmitter)
  
• Zero-Crossing Detector for Microcontrollers