Labels:text | screenshot | line | diagram | font OCR: 8-BIT STEREO/MONO SOUND OUTPUT FROM YOUR PARALLEL PORT THIS DESIGN BY DAVE BOYD (Version 1.56) Addition to V1.00 board that adds support for the other Stereo-on-1 format Refer to the README.1ST for Information regarding the use of this schematic. INPUT DB25 CONNECTOR PIN # 1/6 74HCT04 5 V+ 1 10 K OUTPUT DB25 CONNECTOR 5 PIN # 1/6 74HCT04 0.001 uF 1 10 K 1/6 74HCT04 0.0047 uF VV 1 2 HE 14 14 V1.00 Mode $1.50 Mode DPDT Switch 1 13 14 15 6 9 11 11 25 25 FROM PARALLEL PORT TO V1.00 SOUND BOARD Copyright 1994, Dave Boyd Note Or All I.C/'s must have o 1 uF decoupling capacitor connected across their power and GND pins. Note 11 Pin 14 on the 74HCT04 should be connected to 5 V+. Pin 7 should be connected to ground. Note 21 Pins 9, 11, and 13 of the 74HCT04 should be connected to ground. Note 3 Pin ...
