[TRLog] Switch box

[Doug Smith]

>From: Tony and Celia Becker <becker@SPRINTMAIL.COM>
>Problems can be related to the Strobe signal, pin 1, ...

I've been thinking of working on a box like this myself, hopefully
incorporating a band decoder too..  

What's the coding for the band data port?  I assume it's BCD, but the
cross-coding to bands isn't obvious.

I was thinking of using ULN2003 Darlington driver ICs.  This is basically
seven Darlington pairs with a common emitter connection, a catch diode (for
driving inductive loads) with a common anode connection, and separate base
and collector leads for each pair.  Planning on hooking the common emitter
to the strobe pin.  Am I going to regret trying this?

73 Doug

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Douglas E. Smith  W9WI/4 		desmith@Telalink.net.xxx
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