Searching \ for 'OT: timer circuit for LED's' in subject line. ()
Make payments with PayPal - it's fast, free and secure! Help us get a faster server
FAQ page: www.piclist.com/techref/timers.htm?key=time
Search entire site for: 'timer circuit for LED's'.

Truncated match.
PICList Thread
'OT: timer circuit for LED's'
1999\08\17@183804 by Douglas Gourlay

picon face
This is a bit off topic but can anyone point me toward a circuit, with or
without a PIC that will turn on a couple high intensity LED's for a fixed
amount of time, say 15minutes that occupies very little space?  Simple and
easy to impliment.

Please reply off list to spam_OUTdgourlayTakeThisOuTspamhome.com

Thanks,

Doug

1999\08\17@223853 by William K. Borsum

flavicon
face
At 06:26 PM 8/17/99 -0400, you wrote:
>This is a bit off topic but can anyone point me toward a circuit, with or
>without a PIC that will turn on a couple high intensity LED's for a fixed
>amount of time, say 15minutes that occupies very little space?  Simple and
>easy to impliment.
>
>Please reply off list to .....dgourlayKILLspamspam@spam@home.com

I programmed a 16C508 to do this--perfect square wave at 120 Hz for driving
LCD's, a one second precise pulse for long timer periods, and a 1/4 second
on every ten seconds to conserve battery life while driving an LED.

Run the PIC at 3.3 or 3.5 volts for lowest power draw, and interface using
74LVC series if you need to drive the LED at higher voltages.

Enjoy.
Kelly

****************************************************************************
********
All legitimate attachments to this email will be clearly identified in the
text.
William K. Borsum, P.E.
OEM Dataloggers and Instrumentation Systems
<borsumspamKILLspamdascor.com> & <http://www.dascor.com>

More... (looser matching)
- Last day of these posts
- In 1999 , 2000 only
- Today
- New search...