22 May 2005, 13:48, BEN RITCHEY (1:393/68), wrote to MATT MC_CARTHY:

Hi BEN.

 BR> * An ongoing debate between Matt Mc_Carthy and Ben Ritchey rages 
 BR> on ...

 BR>>> I am using one of those IDE to USB I/F cables (works great) and
 BR>>> would like to add a remote LED "activity" light
to the device. 
 BR>>> Is
 BR> | MC>     39      /HOST          (To Host, Active Low) Dual 
 BR> purpose pin.
 BR> | MC>            SLV/ACT         When drive is Slave (SLV), this 
 BR> pin is used
 BR> | MC>                            during a Diagnostic command to 
 BR> signal to
 BR> | MC>                            the Master that a Slave is 
 BR> present.  Drive
 BR> | MC>                            Activity to host: It is active 
 BR> when the
 BR> | MC>                            drive is executing a command.  
 BR> May be used
 BR> | MC>                            by host to drive an activity 
 BR> LED.

 BR> Look like Pin 39 should do; any recommendations for an interface? 
 BR> My 1st choice would be a simple Op amp/LED driver circuit ... :)

I would think with the above description I'd connect from pin #39 to LED,
to 470 ohm resistor, to +5V.  [I don't like bright LEDs].

 BR> Finally finished the IDE box with Green Power and Red Activity 
 BR> LEDs which tested great and are highly visible.

Does this mean you've already got it working?


     Good luck...  M.

--- Msged/386 TE 06 (pre)