Passively Probing an InfiniBand System with an Agilent 16700 Series Logic Analysis System:  Agilent Application Note (app note added  6/06)

PC Board Layout Checklist: DC-DC Converters / AB-11:  Fairchild Application Notes (app note added  6/06)

PC Power Applications / AB-52:  Fairchild Application Notes (app note added  6/06)

PC Power Applications / AB-53:  Fairchild Application Notes (app note added  6/06)

PCB layout optimisation:  AN576  (Circuit / schematic design added 6/06)

PC-Based Development Programmer for the PIC16C84:  Microchip Application Note - Published 26-Aug-97   (added 2/06)

PCI Timing Check using the Agilent E2920 PCI Series Exerciser/Analyzer:  Agilent Application Note (app note added  6/06)

Phase Modulated PWM Topology with the ML4818 / AN-42026:  Fairchild Application Notes (app note added  6/06)

PIC 18 Programmer (PIC18F458 PIC18F452 PIC18C252 PIC16C745 PIC18F6620 PIC18F6720):  (Electronic circuit added 7/03)

PIC 5x7 Display:  (added 10/02)

PIC Based Motor Controller:  (circuit / schematic added 2/03)

PIC Based Packet Radio Encoder:  (Electronic circuit added 7/03)

PIC Based RS485 Multiplexer:  Recently, I had to design a circuit real quick that transmitted 4 parallel TTL data bits over 350m of twisted pair cable. I needed to feed in four parallel data bits at one end, and get 4 parallel data bits out the other end, completely transparent to the transmitting and receiving circuits.
I decided to implement this using a PIC 16F84 for both an encoder and decoder, and use RS-485 drivers (DS26C31 and DS26C32) to drive the 350m cable. I only needed five I/O pins per PIC, so this could have been implemented....  (added 2/06)

PIC Controlled DDS VFO 0 to 6 MHz:  (circuit added 7/02)

PIC debugging routine reads out binary numbers:  12/07/00 EDN Design Ideas /  (added 2/06) 

PIC Demo Board:  (Electronic circuit added 7/03)

PIC Die:  Built using a PIC16F84, about 4 hours worth of code and a few bits on a breadboard. This was the first time I've worked with PIC's so it was a learning exercise. I started with the 'Hello World' microcontroller equivalent i.e.  Blinking LED, then tried the 'Knight Rider' sequencing LEDs, and then hacked this together. The code is written and assembled using the Microchip MPLAP IDE V5.70.  I only did this as an exercise to familiarise myself with PIC assembler, but having got it working I decided I wanted it smaller and as I had just acquired some 12F675s I took the original 16F84 code and developed it further to work with the 12F675....   (added 10/05)

PIC Digital Clock Timer:  (added 11/05)

PIC ICD:  (Electronic circuit added 7/03)

PIC LCD and Keypad Driver:  (Electronic circuit added 7/03)

PIC Logic Probe with Pulser:  (added 10/02)

PIC Micro LED Projects:  (Electronic circuit added 7/03)

PIC Micro Multiple Servo Motor Interface:  (Electronic circuit added 7/03)

PIC Micro Programmer:  (Electronic circuit added 7/03)

PIC micro to ISA Bus interface:  (Electronic circuit added 4/05)

PIC MicroController Servo Motor Interface:  (Electronic circuit added 7/03)

PIC NiCad Battery Charger:  This cheap and easy to build NiCd/NiMH Battery Charger is suitable for automatically charging a wide range of batteries for many applications. Proper chargers are usually expensive and cheap chargers supplied with the original equipment often incorrectly charge the cells and dramatically shorten their life. This 'intelligent' charger was designed for high current and rapid charge applications such as cordless power tools and model racing cars. These battery packs are expensive and sometimes difficult to purchase. This charger uses the cell manufacturer's recommended charge method, to safely and quickly charge batteries. (added 10/05)

PIC plots pixels sans controller :  02/16/98 EDN-Design Ideas  / (added 2/06)    

PIC Programmer 2:  (Electronic circuit added 7/03)

PIC Programmer:  to download programs into PIC microprocessors. (Electronic circuit added 7/03)

PIC Project #1   RS-232 to I2C Interface:  (Electronic circuit added 7/03)

PIC Tock Video Clock:  (Electronic Circuit diagram added 03/03)

PIC vacuum fluorescent display interface:  (Electronic circuit added 4/05)

PIC12C508 Night Light Saver:  (circuit added 7/02)

PIC12C508 Phase Controller for 2kW heater:  (Electronic circuit added 7/03)

PIC12C509 Gym Timer:  (Electronic circuit added 7/03)

PIC12C509 Logic gate Replacement for Nitrogen Filler:  (Electronic circuit added 7/03)

PIC14C000 A/D Theory and Implementation:  Microchip Application Note - Published 26-Aug-97   (added 2/06)

PIC16/17 Oscillator Design Guide:  Microchip Application Note - Published 26-Aug-97   (added 2/06)

PIC16C505 IR/Wireless Remote Control:  (Electronic circuit added 7/03)

PIC16C54A EMI Results:  Microchip Application Note - Published 26-Aug-97   (added 2/06)

PIC16C57 Based Code Hopping Security System Application Note:  Microchip Application Note - Published 29-May-97   (added 2/06)

PIC16C5x/PIC16Cxx Utility Math Routines:  Microchip Application Note - Published 26-Aug-97   (added 2/06)

PIC16F639 Microcontroller Overview:  Microchip Application Note - Published 2-Dec-05   (added 2/06)

PIC16F84 Based Morse Code Reader:  (added 8/02)

PIC16F84 Countdown timer:  (Electronic circuit added 7/03)

PIC16F84 CW Decoder:  (Electronic circuit added 7/03)

PIC16F84 Debugging Terminal:  (circuit added 7/02)

PIC16F84 LED Chaser #2:  (Electronic circuit added 7/03)

PIC16F84 LED chaser:  (Electronic circuit added 4/05)

PIC16F84 LED signboard 2:  (Electronic circuit added 4/05)

PIC16F84 LED signboard:  (Electronic circuit added 4/05)

PIC16F84 Line Following Robot:  (circuit added 7/02)

PIC16F84 Miniature Real Time Controller:  (circuit added 7/02)

PIC16F84 Programmer:  (circuit added 7/02)

PIC16F84 Pulse Monitor with Date/time Output (ZIP):  (Electronic circuit added 7/03)

PIC16F84 RF remote Controller:  (Electronic circuit added 4/05)

PIC16F84 Serial I/O Expander with PicBasic:  (added 9/02)

PIC16F84 Stepper Motor Controller:  (Electronic circuit added 7/03)

PIC16F84 Tone Generator (6 Bit):  (Electronic circuit added 7/03)

PIC16F84 Tone Generator with Source Code:  (Electronic circuit added 7/03)

PIC16F84 Tone Generator:  (Electronic circuit added 7/03)

PIC16F84 TRIAC/IGBT Brightness Phase Controller:  (Electronic circuit added 7/03)

PIC16F84/PIC16F87x-In-System-Programmer:  (Electronic circuit added 4/05)

PIC16F873 DC motor speed Controller:  (Electronic circuit added 4/05)

PIC16F873 Digital Clock:  (Electronic circuit added 7/03)

PIC16F873 Remote Display:  (Electronic circuit added 7/03)

PIC16F873 Ultrasonic Range Meter:  (Electronic circuit added 7/03)

PIC16F876 Datalogger:  (Electronic circuit added 4/05)

PIC16F877 Programmer and Development System:  (Electronic circuit added 7/03)

PIC17CXXX to PIC18CXXX Migration:  Microchip Application Note - Published 28-Sep-99   (added 2/06)

PIC18C CAN Routines in 'C':  Microchip Application Note - Published 5-Nov-01   (added 2/06)

PIC18C ECAN C Routines:  Microchip Application Note - Published 28-Feb-05   (added 2/06)

PIC18CXXX/PIC16CXXX DC Servomotor:  Microchip Application Note - Published 25-Jul-00   (added 2/06)

PIC18XXX8 CAN Driver with Prioritized Transmit Buffer:  Microchip Application Note - Published 9-Sep-02   (added 2/06)

PICADC a Free PIC Based intelligent A/D Converter:  (added 8/02)

PIC-based Motor Controller:  (Circuit added 9/04)

PIC-Based Web Server:  (Circuit / schematic design added 6/06)

PicCon   Hidden Radio Transmitter Controller:  (Electronic circuit added 7/03)

PICMASTER Support of Microsoft Windows(TM) DDE:  Microchip Application Note - Published 26-Aug-97   (added 2/06)

PICmicro Microcontroller Firmware FLow Chart of MCRF45X Demo Reader:  Microchip Application Note - Published 7-Jan-03   (added 2/06)

PICmicro® DeviceProgramming: What You Always Wanted to Know (But Didn?t Know Who to Ask):  Microchip Application Note - Published 23-Nov-05   (added 2/06)

PICmicro® Midrange MCU Code Hopping Decoder:  Microchip Application Note - Published 15-Nov-97   (added 2/06)

PicoWeb V5.1 (AT90S8515) tiny Web Server:  (Electronic circuit added 7/03)

PIC-Programmer 2:  (Electronic circuit added 4/05)

PIC-Tock video clock:  (Electronic circuit added 4/05)

Picxie 2 8x8 Animated LED Signboard:  (added 10/02)

Piecewise Linear Interpolation on PIC12/14/16 Series Microcontrollers:  Microchip Application Note - Published 21-Feb-05   (added 2/06)

PIN Diode Fundamentals:  MicroNote 701 from Microsem  (Circuit / schematic design added 6/06)

PIXpand:  (circuit added 7/02)

PLL Jitter and Its Effects in the CAN Protocol:  Microchip Application Note - Published 15-Jun-04   (added 2/06)

POCSAG Encoder/decoder:  (Electronic circuit added 7/03)

POS Register:  Intersil Application Block Diagram  (Circuit / schematic design added 6/06)

POS Self-Service:  Intersil Application Block Diagram  (Circuit / schematic design added 6/06)

Power Conversion for the Data Communications Market / AB-28:  Fairchild Application Notes (app note added  6/06)

Power Factor Correction (PFC) Basics / AN-42047:  Fairchild Application Notes (app note added  6/06)

Power Factor Correction Controller / AN-4107:  Fairchild Application Notes (app note added  6/06)

Power Over Ethernet Applications / AB-44:  Fairchild Application Notes (app note added  6/06)

Power up a microcontroller with pre power down data:  03/17/05   EDN-Design Ideas / (added2/06)

Practical PICmicro® Oscillator Analysis and Design:  Microchip Application Note - Published 11-Aug-04   (added 2/06)

Precision 1Hz Clock Generator using Chip on Board:  (Circuit / schematic design added 6/06)

Precision Active Filter Block with Repeatable Performance to 10MHz:  DN324 -  Design Notes (Linear Technology) (Circuit / schematic design added 6/06)

Predicting the Behavior of Real-Time Systems:  Agilent Application Note (app note added  6/06)

Printed Circuit Board Design Techniques for DS40MB200:  National Semiconductor - Application Note   (added 2/06)

Processor controls watchdog circuit:  01/18/96 EDN-Design Ideas / (added 2/06) 

Program Turns PC sound card into a function generator:  09/2/99 EDN Design Ideas /  (added 2/06) 

Programmable charger fills capacitor banks :  10/08/98 EDN-Design Ideas  / (added 2/06)

Programmable Clock Oscillator:  PIC-Tock video clock using a PIC16C61 (Electronic Schematic / circuit added 4/02)

Programmable Current source powers charger:  06/22/95 EDN-Design Ideas / (added 2/06)

Programmable Timer for Appliances:  (Electronic Circuit / Schematic added 10/04)

Programmer for the 68HC705C8 MicroController:  (Electronic circuit added 4/08)

Programmer PIC16F84,12C50x and EEPROM 24Cxx #2:  (Electronic circuit added 7/03)

Programmer PIC16F84,12C50x and EEPROM 24Cxx:  (Electronic circuit added 7/03)

Programming Baseline Flash Devices with PICkit 1:  Microchip Application Note - Published 16-Feb-05   (added 2/06)

Programming Pulse Generators for Flash Memories:  DN17 -  Design Notes (Linear Technology) (added 2/06)

Programming the AD9832/AD9835:  AN-621-Analog Device Application Notes  (Circuit / schematic design added 6/06) 

Programming the Pocket PC OS for Embedded IR Applications:  Microchip Application Note - Published 20-Apr-04   (added 2/06)

Programming Windows XP® for Embedded IR Applications:  Microchip Application Note - Published 27-Jul-04   (added 2/06)

Protecting from ESD:  MicroNote 109 from Microsem - Emphasizes the fast, sub-nanosecond rise-time of static discharge and the need for low parasitic inductance in protective devices and requirements for shielding where applicable. - (Circuit / schematic design added 6/06)