FACT001: Basic PIC16/17 Oscillator Design:  Microchip Application Note Published 10-Apr-02   (app note added 2/06) The oscillator circuit is one of the most overlooked areas of microprocessor circuit design. Components are usually selected based on the manufacturers? tables. If the circuit starts up and works, fine, no other thought need be given to it, right? Wrong. Many conditions can negatively affect the performance of your design. Higher temperatures and lower supply voltages can lower the loop gain in the oscillator circuit, causing poor, slow, or no start-up. Colder temperatures and higher supply voltages can increase the loop gain of the oscillator circuit, causing the crystal to be overdriven, and potentially damaged; or the circuit can be forced to another harmonic and throw off the timing, or cease functioning altogether. It is also possible to waste power through the improper selection of components or Clock modes.

FACT003: Care and Feeding of the PIC16C74 and Its Peripherals:  Microchip Application Note Published 10-Apr-02   (app note added 2/06)

FAILSAFE Biasing of Differential Buses:  National Semiconductor Application Note   (app note added 2/06)

Failsafe Biasing of LVDS Interfaces:  National Semiconductor Application Note   (app note added 6/06)

Fake Joystick circuit:  (schematic / circuit added 2/07)

Fake Joystick Circuit:  This simple circuit can be used to make the computer to think that there is a real joystick connected to joystick port. This adapter might be useful in some special computer testing applications when you don't have real joystick available.  ASCIII drawing.  (added (6/03)

FAN5230, FAN5233, FAN5235 Component Calculation Spreadsheet and PSPICE Model Guide / AB-19:  Fairchild Application Notes / (app note added 6/06)

Fax to Modem Interface:  (design circuit added 8/02)

FDDI Adapter Card:  National Semiconductor Application Note   (app note added 2/06)

FDDI Concentrator:  National Semiconductor Application Note   (app note added 2/06)

FDDI Ethernet Router:  National Semiconductor Application Note   (app note added 2/06)

Feeling Comfortable with Logic Analyzers:  Aligent Application Note  (added 2/06)

FIR filter scheme saves ROM storage space:  05/11/95 EDN-Design Ideas / (added 2/06)

Force/Sense Connection Eliminates Multiplexer on Resistance Error:  01/22/2004  EDN-Design Ideas  Digitally controlled gain is an everyday analog-design element. You frequently find this element in an op-amp-based, transimpedance current-to-voltage converter. When you design digital gain control into such a converter, the usual scheme is to arrange things such that a digital multiplexer selects the appropriate feedback resistor for each gain figure. (added 10/05)

Four Channel 8 Bit Analog-to-Digital Converter for PC:  (circuit added 7/02)

FPD-Link PCB and Interconnect Design-In Guidelines:  National Semiconductor Application Note   (app note added 2/06)

FPGA Circuit Emulates 74X74 Flip Flop:  10/12/95 EDN-Design Ideas / (added 11/05) 

FPGA Implements X50 Division 3 Recommendation:  04/13/2000  EDN-Design Ideas  The scheme in Figure 1a uses five delay cells and an XOR gate to configure the data stream for the X.50 Division 3 recommendation of ITU-T. The X.50 recommendation defines the fundamental parameters of a multiplexing scheme for interworking data networks using different envelope structures. Division 3 applies to the interworking between two networks, both of which use the 8-bit envelope structure. (added 10/05)

Frequency Dithering Enhances High Performance ADCs:  08/18/05 EDN Design Ideas  / (added 11/05)  Modification of dithering principle respects A/D characteristics

Frequently Asked Questions About Data Converters:  Maxim Application Notes / 801 / Jul-06  (app note added 6/06)

Futurebus+ Wired-OR Glitch Effects and Filter:  National Semiconductor Application Note   (app note added 2/06)

GAL Programmer:  This is a simple GAL programmer that can be controlled with PC's parallel port. Its supported devices are Lattice GAL16V8/20V8/22V10 and versions of A through D. Now added a new function of PIC programmer.  (added 10/05)

Game boy camera PC serial interface:  (schematic diagram added 2/07)

Generating Low Duty-Cycle Pulses with a Function Generator (5988-7507EN):   Aligent Application Note 1407 (added 4/08)

Genius Mouse Schematics:  (electronic circuit added 4/05)

Get Just Enough Boost Voltage:  05/27/04 EDN Design Ideas  / (added 11/05)  Adding a current-mirror circuit to a typical boost circuit allows you to select the amount of boost voltage and to ensure a constant difference between the input and the output voltages (Figure 1). This circuit is useful for high-side-drive applications, in which a simple voltage doubler is unacceptable because of the voltage range of the components involved or where the input voltage can vary ...

Get Power Out of PC Parallel Port #2:  An article which includes circuits, shares how to us a parallel port to connect to a very wide selection of devices like software protection dongles, removable disks, modems, network adapters, printer sharing units, parallel port extenders, soundcards, electronic telecard readers and many circuits.  (added 4/02)

Get power out of PC parallel port #1:  (circuit added 1/07)

Get Power Out of PC Parallel Port #2:  (electronic schematic / circuit added 11/05)

Get Power Out of PC RS-232 Port #1:  (electronic schematic / circuit added 11/05)

Get power out of PC RS-232 port #2:  (diagram added 2/07)

Getting Power from RS-232 Interface:  (electronic circuit added 4/05)

Glossary of Frequently Used High Speed Data Converter Terms :  Maxim Application Notes / 740 / Aug-06  (app note added 6/06)

Gold Wafer (smartcard) Programmer:  (electronic circuit added 4/05)

GPS receiver (Gamin, Eagle etc) to PC interface cables:  (diagram added 1/07)

Graphics Controller Handles Interleaved Memory:  02/16/95 EDN-Design Ideas / (added 11/05)

Grounding for Low-and-High-Frequency Circuits:  AN-345 Analog Devices Application Note   (app note added 6/06)   Know Your Ground and Signal Paths for Effective Designs. Current Flow Seeks Path of Least Impedance-Not Just Resistance....

Group Delay Equalizer has Gain More Than One:  10/12/95 EDN-Design Ideas  / (added 3/03)      

Guidelines for RC5035/36 Motherboard Designs / AN-55:  Fairchild Application Notes / (app note added 6/06)

HamComm Interface:  (circuit / schematic added 6/05)

Hardened Ethernet cable goes underground:  2/2/06  EDN Design Ideas  /  (added 10/06)  How to environmentally harden a Category 5 UTP (unshielded-twisted-pair) cable.

Hardware add on provides mixed format multiply:  06/22/95 EDN-Design Ideas / (added 2/06)  Fixed-point-DSP users are aware of overflow problems that frequently occur in current algorithms such as digital filtering. Many solutions to problems such as floating point or block floating point exist; these methods, however, are cumbersome and slow to execute on fixed-point machines. An alternative is to adopt a mixed-number format consisting of an integer and a fractional part. This technique is particularly attractive for fixed-point processors with wide data words expressed in bits. An example is the 24-bit DSP56001 from Motorola. Fig 1 shows a possible fit and the covered range for such a format....

Hardware and Software Resolution for a Pointing Device:  Microchip Application Note Published 26-Aug-97   (app note added 2/06)

Hardware Histogram Speeds ADC Test:  11/13/03 EDN Design Ideas  /  (added 1/05)  Accumulating enough samples to effectively and accurately measure linearity errors in pipeline converters at production test and minimizing test time are difficult enough. Add to that multiple sites, multiple channels, and the expense of multiple custom-instrument resources during periods of low capital expenditure, and engineers must think creatively to increase throughput without sacrificing ......

Hardware Implementation Guide for PI7C8140A:  Pericom Semiconductor Application Note # 07)2 (app note added 02/05)

Hardware Implementation Guide for PI7C8150 PCI-PCI Bridge:  Pericom Semiconductor Application Note # 055 (app note added 02/05)

Hardware Implementation Guide for the PI7C8148:  Pericom Semiconductor App Note # 07)5 (app note added 02/05)

Hardware Implementation Guide for the PI7C8152:  Pericom Semiconductor Application Note # 058 (app note added 02/05)

Hardware Implementation Guide for the PI7C8154:  Pericom Semiconductor Application Note # 060 (app note added 02/05)

Headphone driving circuit for soundcards:  (electronic circuit added 2/07)

Headphone Driving Circuit for Soundcards:  (electronic schematic / circuit added 11/05)

Hi-Fi PC Speaker System:  (electronic schematic added 1/07)

High Current Driver Serves Home Power Line Modems:  10/16/03 EDN Design Ideas  /  (added 1/05)  Home-based power-line networking signals are similar to xDSL (digital-subscriber-line) signals in that they both typically employ a form of OFDM (orthogonal frequency-division multiplexing). Both applications require high output current, wide bandwidth, and good linearity. This Design Idea describes a simple line-driver circuit, designed with an xDSL driver, to drive high-speed data over a home......

High Efficiency Adaptable Power Supply for XENPAK 10Gb/S Ethernet Transceivers:  DN295  Design Notes (Linear Technology) (app note added 1/06)

High Efficiency I/O Power Generation for Mobile Pentium Iii Microprocessors:  DN258  Design Notes (Linear Technology) (app note added 6/06)

High Speed, Low Skew RS-422 Drivers and Receivers Solve Critical System Timing Problems:  National Semiconductor Application Note   (app note added 2/06)

High-speed DRAMs keep pace withHigh-speed systems:  02/03/97 EDN-Design Feature / (added 2/06)    To get high performance from high-speed systems, you need high-performance memories. Carefully analyze the EDO, SDRAM, and RDRAM system-timing parameters to see which memory type delivers the performance that your system needs.—Craig Hampel, Rambus Inc

Hints and Kinks for USB Decoding:  02/07)/02 EDN Design Ideas  /  (added 1/05)  The USB is a serial data-transmission system that uses cables to connect peripheral equipment to PCs. All new computers have two or more USB receptacles, and the predictions are that they will replace most of the legacy receptacles on older PCs. The 1.0 and 1.1 standards for USB were for 1.5 and 12 Mbps at lowand full-speed rates, respectively. ...

Homebuilt RS232 LCD Interface:  (diagram added 2/07)

Hot Swap and Buffer I2C Buses:  DN263  Design Notes (Linear Technology) (app note added 1/06)

Hot Swapping the Compactpci Bus:  DN200  Design Notes (Linear Technology) (app note added 1/06)

Hot Swapping the PCI Bus:  DN155  Design Notes (Linear Technology) (app note added 1/06)

How to boot from a single level cell nand flash memory:  AN1935... This AppNote describes how to boot from an STMicroelectronics Single Level Cell NAND Flash memory.... This AppNote shows how to use a Single Level Cell NAND Flash as the primary memory device....  -AN1935... APPLICATION... (app note added 6/06)

How to Connect Two or More Signal Generators to Create a Multi-Channel Waveform Generator (5988-8151EN):  Aligent Application Note  (added 2/06)

How to construct Garmin GPS receiver interface cables:  (electronic circuit added 1/07)

How to Find Boundary Condition Problems in Your PCI Bus Interface:  Agilent Application Note   (app note added 6/06)

How to Get Power from PC to Your Circuits:  (design circuit added 8/02)

How to Interpret DS1852 Temperature & Voltage Readings:  Maxim Application Notes / 1194 / Oct-06  (app note added 6/06)

How to Make a Roomba Serial Interface:  (electronic circuit added 2/07)

How to migrate from the m95 spi eeprom to the M25Pe spi serial flash:  AN2081 This AppNote describes how to migrate from the M95 family of SPI EEPROMs to the M25PE family of SPI Serial Flash memories....  (app note added 6/06)

How to use the ftl and hal sotfware modules to Manage data in single level cell nand flash memories:  AN1820 This AppNote gives an overview of the architecture of the Flash Translation Layer (FTL) and Hardware Adaptation Layer (HAL) software modules, which allow operating systems to read and write to NAND Flash memory devices in the same way as disk drives... (app note added 6/06)

How-to build a webserver for 30Euros with ENC28J60:  The ENC28J60 is a single chip 10mb Ethernet controller easy to drive by a microcontroller with SPI bus. (project added 10/06)

How-to build an usb device with 18F4550 or 18F2550:  (project added 10/06)

HPC as a Front-End Processor:  National Semiconductor Application Note   (app note added 2/06)

http://www.teaser.fr/~amajorel/jasmin/:  (schematic / circuit added 2/07)

HVCMOS Drivers for Non-Impact Printing:  Supertex Semiconductors  (app note added 2/06)