PC Infrared Remote Control #1:  (circuit added 7/02)

PC Interface for Point Controller:  (electronic circuit added 4/05)

PC IR Remote Control:  (schematic / circuit added 11/03)

PC Monitors Two Way RS-232 Transmission:  02/01/01 EDN-Design Ideas / (added 05/03)

PC Mouse Implementation using COP800:  National Semiconductor Application Notes first published05-Aug-1995 (app note added 4/02)

PC Parallel Port Output Capabilities:  includes instructions how to connect a relay to PC parallel port   (added 4/02)

PC Power Supervisory Circuit with KA3502 / AN-4002:  Fairchild Application Notes / (app note added 6/06)

PC Power Supply Design with KA3511 / AN-4003:  Fairchild Application Notes / (app note added 6/06)

PC Printer Port Controls Frequency Divider:  06/09/94 EDN Design Ideas /  (added 11/05)

PC Printer Port Controls I V Curve Tracer:  Maxim Application Notes / 253 / Nov-07)  (app note added 6/06)

PC Programs PROM Simulator:  01/20/94 EDN Design Ideas / (added 11/05)

PC Securely Controls Relay:  11/23/95 EDN-Design Ideas / (added 11/05) 

PC Serial and Parallel Port Software and Interfaces:  (electronic circuit added 4/05)

PC Serial Port Drives 12 Bit A / D Converter:  Maxim Application Notes / 151 / Dec-07)  (app note added 6/06)

PC Serial Port Receiver:  (electronic circuit added 4/05)

PC Smartcard Reader:  (design circuit added 8/02)

PC SMPS Secondary Side Control IC / AN-4115:  Fairchild Application Notes / (app note added 6/06)

PC Speaker Volume Control Circuit #2:  (electronic schematic / circuit added 11/05)

PC Speaker Volume Control Circuit:  (design circuit added 8/02)

PC Thermometer using PC Game (Joystick) Port:  (circuit / schematic design added 6/06)

PC Thermometer:  (schematic / circuit design added 08/05)