Re: Looking for a Low Cost On Delay Timer

[Jim <alarminex@xxxxxxx>]

On Friday, September 27, 2013 9:48:59 AM UTC-4, John Sowden wrote:

> >
>
> > A simple on-delay timer would work but I'm having trouble finding one with NC contacts.  Tons of stuff $100+, but for this application, it has to be under $20.
>
> >
>
> > Thanks,
>
> >
>
> >
>
> > Bob
>
> >
>
> Get a sensitive relay (coil 1k ohms or so), put about a 3ooo uf
>
> capacitor across the coil, apply 12 volts to the coil, the relay will
>
> hold closed while the cap is discharging into the coil.  Use the n/o
>
> contacts to do what you want.
>
>
>
>
>
> John Sowden
>
> American Sentry Systems, Inc.
>
> San Francisco Bay Area

Naaaaah ..... that would be to simple.

This is being done by a project engineer.

That is: Someone who takes the simplest job and turns it into a big project.  (For the stated reason: "I enjoy making things".)