AVR-Chat

Have you considered something like the Phillips PCA9531/2/3 chips?  They 
are I2C based LED drivers where you can control the brightness via PWM, 
or, slow the clock down and control the blink rate.  I've seen units 
with 4, 8 and 16 LEDs supported.  Check them out.

DLC

Peter Gargano wrote:
> Paul Maddox wrote:
> 
>>how about the good old 74HC595? serial->parallel latch?
>>
>>http://www.semiconductors.philips.com/pip/74HC595.html
> 
> 
> Paul,
> 
>  From the on-line datasheet for the 74HC595BQ (above) we find
> 
> 	Output Drive Capability:
> 	+/- 7.8 mA on parallel output
> 
> That's OK for a low brightness display, but it doesn't have the drive 
> capability if run within its specs.
> 
> Peter


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Dennis Clark    TTT Enterprises
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