MOTM

On Wed, 30 Oct 2002, Sikorsky wrote:

> ----- Original Message -----
> From: "Paul Schreiber" <synth1@...>
> 
> 
> > There is a chip (been around 20 years) called a UN2003 that is made for
> this. Cheap, too!
> 
> you mean ULN2003 - six buffers in a 16 pin dil..?

  Seven darlington buffers in a dil16.  I've used thousands of these as
common-cathode LED display selectors.  For the segment side, I use either
a UDN2981 (eight current-sourcing drivers in a dil18) plus an rdip, or for
BCD I use the CA3161, a legacy part with constant-current outputs which
has the fun feature of being able to display the numerals 0~9, a negative
sign, a blank, and the letters 'H','E','L','P'.

Crow
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