[simpits-tech] Who is using a Centipede shield to drive their LED's ?

[geneb]

On Thu, 21 Nov 2013, Matt Bailey wrote:

> I used a couple of these stacked on an Uno to read all the analog radios
> (including the old-style dial ADF tuner) in a 737 cockpit. Works a
> treat. :)
>
I haven't tried them for inputs yet.  I take it they do a good job?

> Gene, thanks for making your output board available to us, I will
> probably be getting some built when I get into interfacing the
> Sabreliner. Quick question: is there any reason you couldn't wire all
> the Centipede outputs to transistors or FETs and have 64 high-load
> outputs?
>
Right now the only thing I'm using the Centipede for is to drive my 16 
channel high-power boards.  I've got five built out of the eight I'll 
eventually need.  Because of how the driver boards work, the Centipede 
only sees a light load - only enough to bias the TIP-125 into switching 
on.  There's no problem at all in using a whole Centipede for outputs, 
just as long as you're using a driver board.  I would NOT use my driver 
board to drive relays or motors however.  There's no back-EMF protection 
in the circuit so you'll likely blow a driver transistor the first few 
times it's used that way.  That being said, there's no reason why you 
can't create a tiny little board to handle those cases where you need to 
do that kind of switching.

g.


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