Date:         Sat, 21 Dec 2013 13:05:40 -0500
Reply-To:     Larry Alofs <lalofs@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Larry Alofs <lalofs@GMAIL.COM>
Subject:      Re: Bostig Oil Level Warning Light Circuit
Comments: To: Jim Akiba <syncrolist@bostig.com>
In-Reply-To:  <CAHbJSdVamguj3cAnD9=wqSg+Da1a15GuNMxdzHUMSrw8pcBk-w@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

I was going to suggest just hooking a capacitor across the LED, but I
decided that the value would have to be 1000 MFD or more, depending on the
resistor value and what time constant you wanted.

Larry A.



On Sat, Dec 21, 2013 at 12:57 PM, Jim Akiba <syncrolist@bostig.com> wrote:

> The other option is a cap circuit, full analog, and "dumb" but acts as
> a buffer so the float has to be full on for a second+ to light the
> light. We worked one up once that functions but the capacitor needed
> isn't small, about the size of a C battery.
>
> On Sat, Dec 21, 2013 at 9:00 AM, Jarrett Kupcinski <kupcinski@gmail.com>
> wrote:
> > On Dec 20, 2013, at 11:44 PM, Keith Hughes <keithahughes@YAHOO.COM>
> wrote:
> >>
> >> You can insert an On-Delay timer into the circuit.  Something like this:
> >>
> >>
> http://www.grainger.com/product/AIROTRONICS-Time-Delay-Relay-21EW88?s_pp=false
> >>
> >
> > That's a good idea Keith, and looks like it may provide a more robust
> (albeit costly) solution than the IC that David suggested. Fortunately it's
> not so expensive that I can't use it as a fallback if I can't get the timer
> circuit to work out right. Definitely looks like a more plug and play
> solution.
> >
> > Thanks for pointing these out to me.
> >
> > -Jarrett
>