/pix/tty/hardware/ltspice/?C=S&O=A 
      Name                        Last modified      Size  Description
      Parent Directory                                 -   
      LM7805.asy                  2018-09-28 16:48  420   
      6N138.sub                   2018-09-28 16:48  520   
      tty-led-driver.asc          2018-09-28 16:48  875   
      tty-opto-current-switch.asc 2018-09-28 16:48  1.1K  
      tty-opto-send.asc           2018-09-28 16:48  1.1K  
      tty-20ma-current-source.asc 2018-09-28 16:48  1.2K  
      6N138.asy                   2018-09-28 16:48  1.4K