On Fri, 16 Feb 2007 01:21:33 -0800, John E.
wrote:

So, since this uses the MC14511 driver, which was designed for LED
7-segment
displays, all I have to do is provide resistors to each element and rewire
for a common-cathode LED display, right?

Right.
-- John Fields

A little clarification, please...

I'm all ready to start looking for a CC display, when I look at the data
sheet for MC14511BCP and it has example circuit hookups for both CC and CA.

I thought a driver output was for one or the other "gender", either CC or CA.


Am I reading this right? Can I use either without further need of other
configuration or circuitry? Seems too good to be true...

---
It is. [too good to be true]

The device, by itself, is designed to drive a common cathode display
as shown in the upper left hand corner on page 6 of this data sheet:

http://www.onsemi.com/pub/Collateral/MC14511B-D.PDF

Immediately across the page from it is the common anode
configuration, which requires an additional transistor and resistor
_per segment_ .


--
JF