Re: LED control circuit

From: Jonathan Kirwan (jkirwan_at_easystreet.com)
Date: 11/05/04 

Date: Fri, 05 Nov 2004 07:33:26 GMT

On Thu, 4 Nov 2004 21:24:52 -0000, "bob" <sorry@spamboys.com> wrote:

>Hmmmm, thats a bit beyond my me , how about a five postion rotary switch
>and some kind of delay/ramp/decay etc arrangement so the LEDs take about one
>second to reach full brightness and one second to extinguish when switched off ?
>is that analogally possible?

Sounds like a concept. But a little different from how I first read what you
said (which seemed to be an entirely analog adjustment so that you can back off
a bit, more back forward, etc.) If you use switches, the brightness of the
first row is entirely controlled by time, I guess (your hypothetical 'one
second'), rather than the position of the potentiometer. So how does all the
row get reset back to 'off', after the time expires and it is at its brightest,
so that you can restart that row? The concept seems a bit more fuzzy to me,
now, than it was.

Jon

Relevant Pages

  • Re: 8 LED analog display
    ... >>>independently drive the continous brightness of 8 high powered LED's. ... analog values within one analog value. ... channel PWM and interface it to serial, ... control circuit for the LEDs. ...
    (sci.electronics.design)
  • Re: LCD monitors Inverter bad ?
    ... have all the lamps switched on all the time - the brightness signal ... alters the intensity of all lamps, not switches some of them off. ... In your case the inverter is faulty - if one of the outputs goes bad, ... a fault signal switches off all the inverter outputs. ...
    (sci.electronics.repair)