Hi,

If I increase the 'on' time for a display, wont this then also increase =
the
'off' time for the other displays, thereby negating the benefit? I =
should be
able to get this same effect by increasing the prescaler on my timer
interrupt that drives the displays. I tried changing this and the lower
frequency of updating didn't seem to make a difference, except that it
starts to flicker noticibly when its too low :-).

  _____=20

Andr=E9 Miller =09


-----Original Message-----
From: pic microcontroller discussion list =
[mailto:PICLIST@MITVMA.MIT.EDU] On
Behalf Of Spehro Pefhany
Sent: 17 March 2004 12:31 PM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [PIC:] Multiplexing seven segment displays, correct =
resistor
values?

At 08:12 PM 3/17/2004 +1000, you wrote:

>  If you have the time to spare, leave the leds on for a while, few mS, =

>then switch to the next segment, and so on.
>  In other words, increase the "on" time compared to the off time.
>  Only works if your chip hasn't much else to do.

He's using interrupts, so his program can walk and chew gum at the same
time, no problem. It shouldn't use more than a couple percent of the
processor throughput.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the
reward"
speff@interlog.com             Info for manufacturers: =
http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  =
http://www.speff.com

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads