This is some information about the led-board Roman Dolejsi 
(roman@sorry.vse.cz) added support for.

-----------------------------------------------------------------------------



LED Meter on LPT port
---------------------
  Here is the circuit plane for LED meter on LPT. It's very cheap and everyone
can even do pass-through circuit to have it coexisting with printer or whatever.
The resistor values are informative only, everybody can tune them to have
intensity he/she wants (of course only if LEDs can live with that ;-)

          signal   pin       150   (green LED, located most on the left/down)
          D0       2      >|>|Ŀ       DF0
                             150   (green LED)   
          D1       3      >|>|Ĵ       DF1
                             150   (green LED)   
          D2       4      >|>|Ĵ       DF2
                             150   (green LED)   
          D3       5      >|>|Ĵ       DF3
                             150   (green LED)   
          D4       6      >|>|Ĵ
                             150   (yellow LED)  
          D5       7      >|>|Ĵ       HardDrive
                             150   (orange LED)  
          D6       8      >|>|Ĵ
                             150   (red LED)     
          D7       9      >|>|Ĵ       Power
                                                  
          GND      20     >


Bulb Meter on LPT port (LED Meter compatible)
---------------------------------------------
  This is a circuit plane for building meter on LPT consisting of bulbs. You
can make this one to have big lights in your room to enjoy emulation. It has
been successfully tested with 100W bulbs and even 200W is ok. Of course you
will be probably unable to drive it with hallogen lights :-)) but.. who knows..
This circuit is projected for 220V/50Hz. It consists of two separated parts,
one as the TTL driver working on LPT's 5V and the second one with the bulbs
working on 220V. Warning! It's dangerous touching the circuit behind the opto.
Please isolate it and make sure nobody can touch it... Values needn't be
strictly those drawn on the circuit. When it doesn't shine try to decrease
resistor values.
This circuitry is property of Petr Slechta (Piitr). Building of it is on your
own risk. Anyway, questions about it can be send to xslecht1@hwlab.felk.cvut.cz.
Thyristor has czech naming convention. Don't know other equivalents but the
only needed requirement is that it must be 1A capable.

                 5V part | 220V part !!! don't touch while running !!!
                         |
signal pin       anode|Ŀcollector
 D0     2  >Ĵ OPTO Ŀ                    (green, first)
             2k     ڴ  |   Ŀgate   BULB 220V,max 200W
              cathode|       1k8     |<|(X)Ŀ DF0
                        | emitter     cathode  anode         
                     |Ŀ                 THYRISTOR      
 D1     3  >Ĵ  |   Ĵ               KT505 (1A)   
                     ô  |   Ŀ               
                     |                |<|(X)Ĵ DF1
                     |Ŀ                                
 D2     4  >Ĵ  |   Ĵ                            
                     ô  |   Ŀ               
                     |                |<|(X)Ĵ DF2
                     |Ŀ                                
 D3     5  >Ĵ  |   Ĵ                            
                     ô  |   Ŀ               
                     |                |<|(X)Ĵ DF3
                     |Ŀ                                
 D4     6  >Ĵ  |   Ĵ                            
                     ô  |   Ŀ               
                     |                |<|(X)Ĵ
                     |Ŀ                                
 D5     7  >Ĵ  |   Ĵ                            
                     ô  |   Ŀ               
                     |                |<|(X)Ĵ HardDrive
                     |Ŀ                                
 D6     8  >Ĵ  |   Ĵ                            
                     ô  |   Ŀ               
                     |                |<|(X)Ĵ
                     |Ŀ                                
 D7     9  >Ĵ  |   Ĵ                            
 GND    20 >  |   Ŀ                Power
                      |                |<|(X)Ŀ
                         |                                          
                         |        Ŀ              
                 5V part | 220V part           ZENER                
                                               |>|Ĵ              
                                                15V                 
                                                       50          
                                                                    
                                                      |<|Ŀ non    
                                                             el-lyt!
        (phase)                                             1F/300V
           >ĴĴ
                                                  100              
 220V/50Hz                                                     
                                                               500k  
           >

