Computer/Software/Internet

A Power-Wise Server
A Supercomputer on your Desk
A Tale of Two Smartcards
An RLC Meter for under £ 2.00
An SPI-networked Microcontroller
Assistance for BASCOM Programmers
ATmega meets Vinculum
Automatic Mains Disconnect
AVR Web Server
Brim Full
BTX
C Sharp (1)
C Sharp (2)
CAD in Europe (2)
CAN Explorer
Capacitive Sensing and the Water Cooler
Case Modding
Cheap Logger
Colossus Jr.
COM Port Tester
Communicating with CAN
Computer Off Switch
Cross-linking with Two Patch Cables
Data Logger “deLuxe”
Delphi Floating Strings
Delphi for Electronics Engineers (4)
DirectX for Delphi (DelphiX)
Dream Team
Drop-in Microcontroller Board
DVI Interface
E-blocks: Accelerated Design
Electronic Stamp
Elektor Internet Radio (EIR)
Elektor TV Games Computer (1979)
Expansion for Universal Interface
Experimenting with the MSP430
Explorer-16 (part 1)
Flash Code Lock for PCs
Flowcode version 3 for E-blocks
FMS Flight Simulator Encoder
Free CAD
Free, Open, Licentious…
From A to D via USB
Getting started with embedded C, part 1
Getting Started with Embedded C, part 2
GPS Receiver on USB
Graphs in Excel
Green USB Switch
Hard Disk Selector
Hard Disk Switch
Hard Drive Switch
Home Network for ADSL
Hydra Game Development Kit
i.MX21 ARM9 Linux-board
I2C Slave Kernel for ATtiny13 and `2313
IIR Tool
Inexpensive (Web)server
IrDA Interface
Keyboard goes Game Controller
LCD Status Panel
LogicSim
Macros for ASM programming
Measuring on the PC Display
Microcontrollers for Dummies ...
Mobile Phone Data Cable goes Interface Converter
Monitor Life Xtender
Moving up to 32 Bit
Multicolour HD LED
Notebook and Microcontroller Overclocking
Opacity Measurement by PC
Optimise your PC Soundcard
Panorama
Parallel Port Mains Switching Interface
PC IrDA Port
PC-Based Instruments
PCI Express
Play the Guitar – Recycle Tip
Power over Ethernet (PoE)
Processor Fan Control
Programming with Word
R32C/111 goes OLED
Radio remote Control for PDAs and Smartphones
Remote Thermometer for the PC
Resistors a la carte
RS232 Controlled Switch
SATA
Save Energy by Reverse Engineering
Score: 7.5
SCSI Adapter
SDR Soundcard Tester
Serial Port Driver for Windows
Serially Programmable Crystal Oscillator
Software for Old Computers
Speed Pulse Generator for PC Fans
Surround Light
Temperature Indicator for the PC
The 32-bit Machine
The Challenge
The LEDBUS System
The Secrets of I2C
Tilt Gamepad
True RMS Digital Voltmeter
TV Surround Light
USB <-> RS-232 Cable
USB 3.0 SuperSpeed
USB Audio Recorder
USB Converter Controlled via HTML
USB Data Acquisition Card
USB Flash Board
USB for the Xbox
USB Fuse
USB On-the-Go, OLED and capacitive touch pad
USB Switch for Printers
USB/DMX512 Converter
USB/UART Interfaces
USB-controlled socket for WLAN router power supply
USB-I2C Bridge
USBprog
USB-RS232 Interface
USB-standby-killer
USB-to-TTL Serial Cable
Vista in the lab
Vista versus LPT
Voice Extreme Toolkit
Wireless RS 232 Link
Working with ActiveX
XMEGA Revealed
Zigbee Switching for Remote Control

Audio Video Project 3

Motorised Volume Pot
MP3 Adapter for TV
Mugen: A Hybrid Audio Amplifier
Multimedia RIAA Preamplifier
Multisound for guitars
Music Industry Protecting Audio CDs
Noise Suppression
One-IC audio power amplifier
Optical S/PDIF Output
OSCAR MP3 Player (1)
OSCAR MP3 Player (2)
OTL Headphone Amplifier with Ecc82 (12AU7)
Pandora's Sound & Music Box
Parameter box for MIDI software
Paraphase Tone Control
paX: a power amplifier with error correction (2)
paX: a power amplifier with error correction, Part 1
PC Audio Amp
Phantom Supply for TV Antenna
Phono Splitter
PIXCAXE controls Nokia 3310 display
Plant Growth Corrector
Play the Guitar – Recycle Tip
Portable MD Remote Control Demystified
Power in the pocket, part 1
PPP HiFi Valve Power Amplifier
Precision Headphone Amplifier
Programmable disco lights array (1984)
Protection system for power amplifiers
Quad Bridge Car Amp
Quad Car Amp
QV381m0 Record/Playback Module
RC5 Repeater
Relay Extension for DMX Demultiplexer
Replacement for HT Battery
RGB-to-Colour difference converter
RIAA Phono Preamplifier
RIAA Preamp with FETs
Robot voice
Rotary Encoder for Digital Volume Control
S/PDIF output
Shortwave Monitor
S/PDIF-to-TTL-Converter
SAPS-400Simple Amplifier with SurroundSystem
Simple Audio Power Meter
Simple guitar transmitter
Simple Hybrid Amp
Simple Infrared Control Extender
Simple MD Cartridge Preamplifier
Simple Microphone Preamplifier for Radio Amateurs
Simple Remote Control Tester
Simple Slave Flash
Single-Chip Tone Control
Slave Flash Trigger
Software-defined Valve Radio
Speech Filter
Stand-Alone MP3 Players
Stepped Volume Control
Stereo Microphone Preamplifier
Stereo Peak Indicator
Switchbox for Loudspeakers/Amplifiers
Switching Amplifier for Analogue Signals
Symmetric Output for USB AudioDAC
Temperature Logger
Test beeper for your stereo
Titler for Portable MD Players
Top of the Range Volume Control
Toslink Repeater/Splitter
T-Reg
Tube Box Upgrade
Tube Clipper
Tube-Based Crossovers
Tuned Radio Frequency (TRF) Receiver
Turn That Down, Please
TV Commercials Killer
TV Muter
Ultra-responsive peak detector
Ultrasonic Sound Detector
Universal I/O for Power Amps
Universal Remote Switch Box
USB Audio Codec with S/PDIF
Valve Final Amp (1)
Valve Final Amp (2)
Valve headphone Amplifier
Valve Preamplifier (1)
Valve Preamplifier (1)
Valve Preamplifier (2)
Valve Preamplifier (2)
Valve Preamplifier (2a)
Valve Sound Converter
Valved RIAA Preampfilter
Valves at Low Plate Voltages
Valves at Low Voltages (2)
VCP-2002 Video Copy Processor
Versatile Final Amplifier
VHF Airband Receiver
VHF FM Antenna Booster
Video Correction for Pinnacle Studio MP10
Video Isolator
Video Line Driver
Video Sync Generator
Video Sync Generator
Video to S-VHS Converter
Video-Out Coupling
Waking to Music
Wireless Audio Transmitter

Audio/ Video Project

Detector with Amplification
Digital volume control
Digital VU Meter
Directional Microphone
Directional Microphone
DiSEqC Monitor
DIY LED Projector
DMX 3-in-I
ECC83 (12AX7) Microphone Preamplifier
E-Dictator
EL156 Audio Power Amplifier
Elektor Mini Crescendo (1984)
FET Amp with Valve Sound
Filmnet Decoder (1989)
Filter for Audio Limiter
Five-output Video Distribution Amplifier
FM Stereo Decoder
FM Superregenerative Receiver
Formant synthesizer (1977)
Formerly a tobacco tin
From 17×4 to Channel Routing
Fuel Cell Developments
GBDSO Gameboy Digital Sampling Oscilloscope (2)
Good and Occasionally Favourable
Guitar Effects Switchbox
Headphone Amp with 3D Sound
Hi-fi Wireless Headset
High Voltage Amplifier
High-end Power Amp
High-End-Preamp, Part 1
High-End-Preamp, Part 2
High-Q Notch Filter
Hybrid Headphone Amp
Induction Radio
Infrared remote control
Interference-free Sound
IR-S/PDIF Receiver
IR-S/PDIF Transmitter
ISO Standard for Car Radios
LED Ringflash
Light as Air
Line-2-mic for notebook
LM4906 Boomer Audio Power Amp
Logarithmic Volume Control
Low-Noise Microphone Amplifier
Max. Temp. Detector for Fan Controller
Metronome/Diapason
Mini ATmega Board
Mini Audio DAC
Mini Test Chart Generator
Mini VHF FM Receiver
Modern Surround-Sound Systems
More MP3 Projects

Audio/Video/Photography

1.5 V AF Amplifier
11 W Stereo or 22 W Mono Power Amp
12-V Dimmer
17 V/10 A Switch-Mode Power Supply
2 Transistors, 1 Crystal - that’s it!
2x25 W Power Amplifier for Car Sound Systems
3 V Headphone Amplifier
48-V Microphone Supply
5.1 Surround Switch Box
60-dB LED VU Meter
8-Bit I/O Port
96 kHz Sampling Rate Converter
A Mini DI
Acoustic Noise Control Device
Active Loudspeaker System (2)
Active Loudspeaker System (I)
Active PC Loudspeaker
Adjustable AF Notch Filters
AF Amplifier with Up/Down Volume Setting
Amplifier with Squelch
ATM18 = RFID Savvy
ATX Power Supply Tester
Audio ADC 2001
Audio Attenuator
Audio Click/plop Suppressor
Audio Combiner
Audio DAC 2000 (3)
Audio Input Selector
Audio Level Check for Line Input
Audio Limiter
Audio Switchbox
Audio/Video Switch
Automatic S/PDIF Selector
Auto-off for Audio Gear
Balanced Microphone Amplifier
BBC Radio-MP3 for Seniors
Booster for Cable Radio
Camera = Data Store
Card Radio
Car-Stereo LED Power (VU) Meter
Christmas Tree Lighting with LEDs
ClariTy 2x300W
ClariTy 2x300W Class-T Amplifier, Part 2
ClariTy 2x300W Class-T Amplifier, Part 3
Class-A Triode Push-Pull Amplifier
Coaxial S/PDIF Output
Codec Complete
Colour Tamer
Compact 200 W Output Stage
Compressor for Electret Micro-phone
Crescendo Millenium Edition
DASP-2002 Digital Audio SignalProcessor
DC Protection for the IGBT Power Amp
DC-coupled Audio Amplifier