A 1 Watt 5 Volts Power Booster for the MLX90121:  Melexis Application Note  (app note added 2/06)

A Basic Phase Angle Speed Controller :  Melexis Application Note  (app note added 2/06)

A Clock Design using the PIC16c54 for LED Displays and Switch Inputs:  Microchip Application Note Published 26-Aug-97   (app note added 6/06)

A Design and Manufacturing Guide for the Lead Frame Chip Scale Package:  AN-772 Analog Devices Application Note   (app note added 2/06)

A Low Power Reader Based on the MLX90121:  Melexis Application Note  (app note added 2/06)

A Modulation Index Switch for the MLX90121:  Melexis Application Note  (app note added 2/06)

A Power Booster for the MLX90121:  Melexis Application Note  (app note added 2/06)

A Step-Down Conversion Concept for a Pwm-Mode Boost Converter:  TI Application Note  (added 2/06)

AC Line Powered LEDs:  (circuit diagram added 05/07)

AC Line Powered LEDs:  (electronic circuit added 06/02)

Add Switch-And-LED I/O to DSP's Serial Port :  05/07)/98 EDN-Design Ideas  / (added 6/06)   

Adjustable flashing LED:  (circuit added 05/07)

Adjustable Flashing Led:  (circuit added 7/02)

Alphanumeric LED Display Project:  A phenomenal 256-diode ROM acts as a character generator for a two-digit hexadecimal display.  (project added 11/06)

Alternating Flasher:  This circuit uses three easily available 555 timer ICs. All three work as astable multivibrators. The first 555 has an on period and off period equal to 1 sec. This IC controls  on/ off periods of  or 2 555s which are used to flash two bulbs through  relay contacts. The flashing occurs at a rate of 4 flashes per second. The diodes are used to protect  555 ICs from peaks. The relays should have an impedance greater than 50ohms i.e, y should not draw a current more than 200mA....   (added 10/05)

Alternating LED Blinker uses Four Parts:  03/26/98 EDN-Design Ideas  /  (added 6/03) /Grand Prize Winner1998

Alternating LED Flasher uses Minimal Parts:  11/20/97 EDN-Design Ideas / (added 6/03)   -A pair of alternating flashing LEDs makes an excellent visual alarm, this alternating LED flasher is based on one LED with built-in flashing function and two transistors driving  or normal LED

Alternating LEDs Flasher:  (electronic schematic / circuit added 4/02)

An Efficient and Low Cost Alternative to LEDs for Backlighting Handheld Computer Displays:  DN1004  Design Notes (Linear Technology)  (app note added 1/06)

AN-1251: Switched Capacitor Circuits Provide Efficient and Functional White LED Drive:  National Semiconductor Application Note   (app note added 2/06)

AN-1291:Driving RGB LEDs using Lp3933 Lighting Management System:  National Semiconductor Application Note   (app note added 2/06)

AN-1293: Driving RGB LED using Lp3936 Lighting Management System:  National Semiconductor Application Note   (app note added 2/06)

AN-1324: LM3570: Low Noise White LED Driver System:  National Semiconductor Application Note   (app note added 2/06)

AN-1362: LM27961-Dual-Display White LED Driver with 3/2x Switched Capacitor Boost:  National Semiconductor Application Note   (app note added 2/06)

AN-1392:LM3485 LED Demo Board:  National Semiconductor Application Note   (app note added 2/06)

AN33 ZXSC100 Single cell DC-DC converter LED driving applications:  Zetec Semiconductors  Applications Notes ZXSC100 single cell DC-DC converter offers an ideal solution to driving white LEDs in flashlights, enabling operation from a single NiCd or NiMH cell.   (app note added 6/06)

AN-347: Shielding and Guarding:  AN-347 Analog Devices Application Note   (app note added 2/06)   How to Exclude Interference-Type Noise. What to do and Why to do it-A Rational Approach

AN529: Multiplexing LED Drive and 4x4 Keypad Sampling:  Microchip Application Note Published 26-Aug-97   (app note added 2/06)

AN590: A Clock Design using the PIC16c54 for LED Displays and Switch Inputs:  Microchip Application Note Published 26-Aug-97   (app note added 6/06)

AN-772: A Design and Manufacturing Guide for the Lead Frame Chip Scale Package:  AN-772 Analog Devices Application Note   (app note added 2/06)

AN874: Buck Configuration High-Power LED Driver:  Microchip Application Note Published 4-Jan-06   (app note added 2/06)

AN948: Efficiently Powering Nine White LEDs with the MCP1650:  Microchip Application Note Published 3-Aug-04   (app note added 2/06)

Analog LED Bar VU Meter:  built around discrete components (added 4/02)

Analyze LED characteristics with PSPICE:  01/18/01 EDN Design Ideas / (addes 08/05)  Recent advances in LED technology have lead to LEDs' widespread use in outdoor-signal applications, such as in traffic and railroad signals. A typical LED signal consists of an LED array and a power supply. When a low-voltage power supply is eir desirable or mandatory, series/parallel combinations of LEDs become inevitable. However, analyzing and optimizing series/parallel combinations of LEDs with varying forward characteristics can be complicated. Using  parametric and Monte Carlo capabilities of PSpice greatly simplifies this task.

AN-H48: Buck-Based LED Drivers using the HV9910:  Supertex Semiconductors  (app note added 2/06)

AN-H50: Constant Off-Time Buck-Based LED Drivers using HV9910:  Supertex Semiconductors  (app note added 2/06)

AN-H51: Buck/Boost-Based LED Drivers using the HV9910:  Supertex Semiconductors  (app note added 2/06)

AN-H52: HV9931 Unity Power Factor LED Driver:  Supertex Semiconductors  (app note added 2/06)

AN-H55: HV9911 Switch-Mode LED Driver IC with High Current:  Supertex Semiconductors  (app note added 2/06)

Animated LED Signboard (PIC16C84):  (electronic circuit added 4/05)

Application Hints for Selection of Output Capacitor for TH8061:  Melexis Application Note  (app note added 2/06)

Application ideas : driving leds using l497x, l597x, l692x dc-dc converters families:  AN1891 This application note, describes  main applications and driving methods for LEDs Figure 1. V I characteristic of 8 white LEDs of  same type Figure 4. Basic schematic... (app note added 6/06)

Assorted LED circuits:  (diagram added 05/07)

Assorted LED Circuits:  (electronic circuit added 4/05)

Astable Multivibrator 1:  (circuit added 7/02)

Astable Multivibrator:  (diagram added 05/07)

AT89C2051 Serial Coms to LED Driver:  (circuit / schematic design added 6/06)

AT89C2051/4051 Driving Dot Led:  (circuit added 7/02)

Audio LED VU Meter:  built around discrete components (added 4/02)

Audio Light Modulator:  Audio light modulations add to  enjoyment of music during functions organised at home or outdoors. Presented here is one such simple circuit in which light is modulated using a small fraction of  audio output from  speaker terminals of  audio amplifier. The output from  speaker terminals of audio amplifier is connected to a transformer....  (added 10/05)

Automatic Dual Output Display:  This circuit lights up ten bulbs sequentially, first in one direction and n in  opposite direction, thus presenting a nice visual effect. In this circuit, gates N1 and N2 form an oscillator. The output of this oscillator is used as a clock for BCD up/down counter CD4510 (IC2). Depending on  logic state at its pin 10,  counter counts up or down. During count up operation, pin 7 of IC2 outputs an active low pulse on reaching  ninth count. Similarly, during count-down operation, you again....   (added 10/05)

Automatic Room Lights:  An ordinary automatic room power control circuit has only one light sensor. So when a person enters  room it gets one pulse and  lights come ‘on.’ When  person goes out it gets anor pulse and  lights go ‘off.’ But what happens when two persons enter  room, one after  or? It gets two pulses and  lights remain in ‘off’ ....   (added 10/05)