UniLogic schematic

Components: DD1 74HC14, VD1..VD4 (D311) (Ge or Shotkey)

For use this variant of schematics in program must be setted option "Invert output" If output current of LPT port too small for stable working we recomend use external supply +5V.

For more protection your computer we recomend use opto isolators.

In play mode used outputs D0-D7 LPT.