Labels:text | screenshot | font | diagram | line | number | plot | handwriting OCR: 8-BIT STEREO MONO SOUND OUTPUT FROM YOUR PARALLEL PORT THIS DESIGN BY DAVE BOYD (Version 1.56) Addition to V1.00 boord 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 4 0.001 uF PIN # 1/6 74HCT04 1 10 K 1/6 74HCT04 0.0047 uF 0 14 V1.00 Mode V1.50 Mode DPDT Switch 23456789 4 VVV. 6 8 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 ocross 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 2ı Pins 9, 11, and 13 of the 74HCT04 should be connected to ground. Note 31 Pi ...
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