dumbass semiconductor question

[Scott Gravenhorst]

On Thu, 11 Jun 1998 01:12:42 -0400 (EDT), media at mail1.nai.net wrote:

>
>OK, we all know that you can use an NPN transistor as a current controlled
>switch that is normally open.  I'm trying to modify an ancient drum machine
>for a friend that runs when the footswitch is open and stops when the
>switch is closed (opposite than what you would think).
>
>So what kind of gizmo can I use to the switch that will normally be closed
>(not running) and open (run) when it receives a voltage or from a keyboard
>gate or x0xbox sync??
>
>It's 1AM and I'm just drawing a blank.
>

If the NPN transistor is used as a common emitter switch, then 2
transistors could be used.  The first one inverts for the second one.

-- Scott Gravenhorst
-- FatMan Site: www.teklab.com/~chordman