Java Applet Computes Standard Values :  08/17/98 EDN-Design Ideas  / (added 11/05)   

Joy Stick Controlled   Modernized Toy Throttle:  (electronic circuit added 4/05)

Joystick Interface Projects:  (design circuit added 8/02)

Joystick Interfaces:  analogue interfaces for joysticks for motor controllers  (added 4/02)

Joystick Port as General Purpose Input:  (design circuit added 8/02)

JT-10kb D and JT-6110k B Pro to Consumer Interfaces:  from +4dBu balanced output to -10dbV consumer equipment input (added 6/06)

Jupiter card programmer:  (electronic circuit added 2/07)

Keeloq HCS30X, HCS200 Stand-Alone Programmer:  Microchip Application Note Published 16-Mar-01   (app note added 2/06)

Key Reading Circuit Saves I/O Pins:  02/06/03  EDN-Design Ideas / (added 7/03) Some microcontroller applications usually use too many I/O pins to read keys or onboard switches; in many cases, few pins remain available for other uses. Some alternative ways to read keys yield more free pins. First, consider some ways to effect key reading. Table 1 presents a comparison of four methods with references to circuit configurations (figures 1, 2, 3, and 4)

Keys to Longer Life for CMOS:  AN-349 Analog Devices Application Note   (app note added 6/06)   Here's How CMOS Can be Protected Against Abuse

Kodak DC-20 camera interface (PIC12C509):  (schematic / circuit added 2/07)

Kodak DC-20 camera interface (PIC16F84):  (diagram added 2/07)

LAN Switch in Ethernet Applications:  Pericom Semiconductor Application Brief # 006 (app note added 02/05)

LAN Switching Techniques using the PI5L100 and PI5L200:  Pericom Semiconductor Application Brief # 005 (app note added 02/05)

Laptop Computer Serial Port Power Booster:  (schematic / circuit design added 9/02)

Laser Beam Printer (LBP) Controller Solution Card:  National Semiconductor Application Note   (app note added 2/06)

Laser Printer Prototypes PC Board Artwork:  05/12/94 EDN-Design Ideas / (added 3/03) A nifty method for generating artwork for prototype pc boards uses an ornamental foil originally made to simply dress-up printouts. To use LaserColor foil (Minds In Motion, PO Box 679, Lindhurst, NJ 07)07)1), first draw the artwork, positive or negative, using any drawing program. Whatever is black on the printout becomes opaque on the finished artwork. Next, using a laser printer, print your artwork onto a clear, transparent film. Next, cut a piece of the LaserColor foil and lay it over the artwork, tacking it in place with the little sticky dots supplied. Last, run the sheets through the laser printer again (form feed).  When the film passes over the drum inside the printer, the foil sinters onto those areas of the film that are covered with toner. When you peel over the extra foil, you have artwork suitable for photoetching a pc board..... 

Laser Printer:  Intersil Application Block Diagram  (app note added 6/06)

Layout Guidelines for the FAN5240, PWM Controller for AMD Mobile Athlon™ and Mobile Duron™ Processors / AB-27:  Fairchild Application Notes / (app note added 6/06)

LB-51: Linear Brief 51 Add Kelvin Sensing and Parallel Capability to 3-Terminal Regulators:  National Semiconductor Application Note   (app note added 2/06)

LIN 2.0 Compliant Driver using the PIC18XXXX Family Microcontrollers:  Microchip Application Note Published 27-Oct-05   (app note added 2/06)

Line Driver Economically Synthesizes Impedance:  01/06/94 EDN-Design Ideas  / (added 3/03) The line-driver circuit in Fig 1 uses a second op amp to synthesize the output impedance. The conventional line-driver circuit employs a single op amp having a resistor whose resistance is equal to the desired impedance in series with the op amp's output. The principal drawback of the conventional circuit is that the single op amp must deliver twice the needed output voltage because of the large voltage drop across the output resistor. The circuit in Fig 1is similar to the famous Howland current pump but has different resistor values. To calculate the output resistance, RO, short the input to ground. Then....

Linear Technology Magazine Circuit Collection Volume III:  AN67 Linear Technology Application Note 67 is a collection of circuits for data conversion, interface and signal processing from the first five years of Linear Technology. This application note includes circuits such as fast video multiplexers for high speed video, an ultraselective bandpass filter circuit with adjustable gain, and a fully differential, 8-channel, 12-bit A/D system. The categories included in this app note are data conversion, interface, filters, instrumentation, video/op amps and miscellaneous circuits. (app note added 2/05)

Linear Technology Magazine Circuit Collection Volume V:  AN87 Linear Technology Application Note 87 is the fifth in a series that excerpts useful circuits from Linear Technology magazine. Data conversion, interface and signal conditioning circuits from issue VI:1 (February 1996) through issue VIII:4 (November 1998) are featured. Like its predecessor, AN67, this Application Note includes circuits for high speed video, interface and hot swap circuits, active RC and switched capacitor filter circuitry and a variety of data conversion and instrumentation circuits. All circuits are conveniently indexed by type.  (app note added 2/06)

Linux Infrared Remote Control (LIRC):  (design circuit added 8/02)

Linux on Fujitsu stylistic 1200:  The Fujitsu Stylistic 1200 is a pen computer, the ancestor of modern tablet PC. It's an interesting device for hacker or people interrested by embedded computers. (project added 10/06)

Logic Powered Serial EEPROMs:  Microchip Application Note Published 26-Aug-97   (app note added 6/06)

Lookup Table Facilitates Bit Flipping:  11/23/00 EDN-Design Ideas / (added 5/03)

Low Cost Circuit Programs EEPROMs:  01/04/01 EDN Design Ideas /  (added 2/06)

Low Cost RS-232C Multiplexer Serves as Multiport Adapter:  03/01/96 EDN-Design Ideas / (added 6/06)

Low Power CMOS Oscillator has Push-Pull Output:  04/01/2004  EDN-Design Ideas  Digital oscillators often generate TTLor CMOS-level outputs, referred to ground. Generating a symmetric bipolar output with respect to ground presents a challenge. In this design, four 1.5V flashlight cells create ±3V voltage sources, and the midpoint of cells acts as the ground reference (Figure 1). (added 10/05)

Low Power RS-232C Driver and Receiver in CMOS:  National Semiconductor Application Note 05 Oct1998 / (app note added 5/02)

Low-Cost Multiple Output Flyback Converter for I/O Cards:  National Semiconductor Application Note   (app note added 2/06)

Low-Power CMOS Oscillator has Push-Pull Output:  04/01/2004  EDN-DESIGN IDEAS  Digital oscillators often generate TTLor CMOS-level outputs, referred to ground. Generating a symmetric bipolar output with respect to ground presents a challenge. In this design, four 1.5V flashlight cells create ±3V voltage sources, and the midpoint of cells acts as the ground reference (Figure 1). (added 2/06)

LTC1387: 5V RS-232/RS485 Multiprotocol Transceiver:  DN176  Design Notes (Linear Technology) (app note added 6/06)

LTC1735 Provides Low Cost Efficient Mobile CPU Power:  DN199  Design Notes (Linear Technology) (app note added 1/06)