Revision 2.0 ------------ switched from GTK+ 2 to GTK+ 3 switched from parallel port to FTDI232R (USB to serial/bitbang) LED DBUS FTDI232R --- ---- -------- 0 0 30 1 1 2 2 2 32 3 3 8 4 4 31 5 5 6 6 6 7 7 7 3 Revision 1.0 ------------ shows 8 colored LEDs on screen blink frequency and duty cycle can be set for each LED uses GTK+ 2 controls 8 LEDs attached to parallel port LED BIT D-SUB 25 --- --- -------- 0 0 2 1 1 3 2 2 4 3 3 5 4 4 6 5 5 7 6 6 8 7 7 9