time delay switch

[Lacustral]

I'm looking for a delay switch for a bathroom fan and I haven't found any
that have exactly what I want -
- adjustable time interval from a few minutes to, say, 1/2 hour. I'd
rather not get one that just has a few choices for time interval. You can
get one that gives you 5,10,15, 30 or on-until-switched-off choices, but
I'd like to have it completely adjustable.
- time delay interval controllable on the outside of the faceplate
- doesn't make noise. Spring timers all click as I've heard, so not a
spring timr.

What the delay switch does, is you can leave the fan on after you leave
the bathroom, for an adjustable time.

The closest thing I've found is this:
http://www.rewci.com/fandetisw.html

It has a delay of up to an hour. I don't know why anybody would want to
keep the fan on in the bathroom for an entire hour after leaving, but I
guess it's conceivable. So I'd live with that.

But it's designed so the time delay adjustment is hidden behind
the faceplate, and changed with a screwdriver. I want to have the delay
adjustment on top of the faceplate. So there would be a sort of
screwdriver blade attached to a knob, anchored to the faceplate somehow.

Any ideas about how to do this, so it would work reliably?

Alternatively, I'm sure it's possible to get a circuit that will do the
delay function. If the guts of it could be covered over so it looks nice
- I could buy a wood faceplate and cut circular holes in it for the
knobs - that would
also do. It would have to fit in a gang box, or whatever they call the
metal box that switches are enclosed in.

Laura

 

[Smitty Two]

I'm looking for a delay switch for a bathroom fan and I haven't found any
that have exactly what I want -
- adjustable time interval from a few minutes to, say, 1/2 hour. I'd
rather not get one that just has a few choices for time interval. You can
get one that gives you 5,10,15, 30 or on-until-switched-off choices, but
I'd like to have it completely adjustable.
- time delay interval controllable on the outside of the faceplate
- doesn't make noise. Spring timers all click as I've heard, so not a
spring timr.

What the delay switch does, is you can leave the fan on after you leave
the bathroom, for an adjustable time.

The closest thing I've found is this:
http://www.rewci.com/fandetisw.html

It has a delay of up to an hour. I don't know why anybody would want to
keep the fan on in the bathroom for an entire hour after leaving, but I
guess it's conceivable. So I'd live with that.

But it's designed so the time delay adjustment is hidden behind
the faceplate, and changed with a screwdriver. I want to have the delay
adjustment on top of the faceplate. So there would be a sort of
screwdriver blade attached to a knob, anchored to the faceplate somehow.

Any ideas about how to do this, so it would work reliably?

Alternatively, I'm sure it's possible to get a circuit that will do the
delay function. If the guts of it could be covered over so it looks nice
- I could buy a wood faceplate and cut circular holes in it for the
knobs - that would
also do. It would have to fit in a gang box, or whatever they call the
metal box that switches are enclosed in.

Laura

Omron makes some nice stuff. Here's a pic of a timer I use in the shop.
It's shown set for 0 to 3 seconds, selectable by the large dial. But the
range can be set as 0 to 1.2, 0 to 3, 0 to 12, or 0 to 30. And the units
can be seconds, minutes, hours, or 10 hours. So altogether, it's a timer
that can be set up for 0 to 1.2 seconds, all the way up to 0 to 300
hours. All of that is front panel selectable. There are also several
different logic modes, e.g., how it's triggered and what type of input
causes it to latch, when the timer starts, etc.

http://members.cox.net/prestwich/timer.jpg

 

[Farticus]

The closest thing I've found is this:
http://www.rewci.com/fandetisw.html

It has a delay of up to an hour. I don't know why anybody would want to
keep the fan on in the bathroom for an entire hour after leaving,

.... perhaps a VERY big smell?

 

[ctyguy]

... perhaps a VERY big smell?

Bathroom fan should be continuous, like the fan on a CPU. NBD

Since the time man has done his business in the space where he lives, the
stench will not leave w/o 24/7 exhaust.

 

[Dave M]

I'm looking for a delay switch for a bathroom fan and I haven't found any
that have exactly what I want -
- adjustable time interval from a few minutes to, say, 1/2 hour. I'd
rather not get one that just has a few choices for time interval. You can
get one that gives you 5,10,15, 30 or on-until-switched-off choices, but
I'd like to have it completely adjustable.
- time delay interval controllable on the outside of the faceplate
- doesn't make noise. Spring timers all click as I've heard, so not a
spring timr.

What the delay switch does, is you can leave the fan on after you leave
the bathroom, for an adjustable time.

The closest thing I've found is this:
http://www.rewci.com/fandetisw.html

It has a delay of up to an hour. I don't know why anybody would want to
keep the fan on in the bathroom for an entire hour after leaving, but I
guess it's conceivable. So I'd live with that.

But it's designed so the time delay adjustment is hidden behind
the faceplate, and changed with a screwdriver. I want to have the delay
adjustment on top of the faceplate. So there would be a sort of
screwdriver blade attached to a knob, anchored to the faceplate somehow.

Any ideas about how to do this, so it would work reliably?

Alternatively, I'm sure it's possible to get a circuit that will do the
delay function. If the guts of it could be covered over so it looks nice
- I could buy a wood faceplate and cut circular holes in it for the
knobs - that would
also do. It would have to fit in a gang box, or whatever they call the
metal box that switches are enclosed in.

Laura

Perhaps one of these timers might suit your purpose. Might take a bit of
mechanical work to install but shouldn't be too hard.

http://www.bgmicro.com/index.asp?PageAction=VIEWPROD&ProdID=11333
http://www.bgmicro.com/index.asp?PageAction=VIEWPROD&ProdID=12340
http://www.sciplus.com/singleItem.cfm?terms=12231&cartLogFrom=Search
http://www.surpluscenter.com/item.asp?UID=2007090512144066&item=1-1614&catname=

Cheers!!!!
==============

Dave M

Never take a laxative and a sleeping pill at the same time!!