What's this called?

[joto]

Hi, I need to turn off a certain electronic device X hours (3-4) after i
start it. I want this to happen automatically, so I need something that
goes between the device and the power outlet, which will automatically
switch off the juice after X hours, as if the device was unplugged. I
want it to be as easy to use as possible, so that there's just some dial
or some buttons where I can set the time after which the device is to be
turned off. It's running off of north american standard 120 V, 60 Hz, and
if the device is turned off reliably there could be a sfatey hazard.

What kind of thing would do the job/what's it called?

Thanks.

 

[Bob Myers]

"joto" <a@a.com> wrote in message
news:MPG.1beb472133651336989694@news.queensu.ca...

What kind of thing would do the job/what's it called?

Ummmmmm.....a timer?

Or are you really asking how to build one?


Bob M.

 

[Jim Thompson]

On Thu, 28 Oct 2004 18:57:07 -0500, John Fields
<jfields@austininstruments.com> wrote:

On Thu, 28 Oct 2004 19:13:31 -0400, joto <a@a.com> wrote:

Hi, I need to turn off a certain electronic device X hours (3-4) after i
start it. I want this to happen automatically, so I need something that
goes between the device and the power outlet, which will automatically
switch off the juice after X hours, as if the device was unplugged. I
want it to be as easy to use as possible, so that there's just some dial
or some buttons where I can set the time after which the device is to be
turned off. It's running off of north american standard 120 V, 60 Hz, and
if the device is turned off reliably there could be a sfatey hazard.

What kind of thing would do the job/what's it called?

---
A timer, but if there could be a safety problem if it's turned off
reliably, I'd call it a problem.

;-)

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

 

[CWatters]

"joto" <a@a.com> wrote in message
news:MPG.1beb472133651336989694@news.queensu.ca...

What kind of thing would do the job/what's it called?

Normally a "limit timer". Sometimes found on pottery kilns.

 

[Wim Ton]

"joto" <a@a.com> wrote in message
news:MPG.1beb472133651336989694@news.queensu.ca...

Hi, I need to turn off a certain electronic device X hours (3-4) after i
start it. I want this to happen automatically, so I need something that
goes between the device and the power outlet, which will automatically
switch off the juice after X hours, as if the device was unplugged. I
want it to be as easy to use as possible, so that there's just some dial
or some buttons where I can set the time after which the device is to be
turned off. It's running off of north american standard 120 V, 60 Hz, and
if the device is turned off reliably there could be a sfatey hazard.

What kind of thing would do the job/what's it called?

Thanks.

Get an old fashioned electromechanical timer, the thing with a ring around
it where you stick little pins in. Use it the wrong way round, connect the
outlet (socket) to the mains and and the inlet (pins)to the load. This
ensures that when the load is switched off, it will not come on again after
24 hours. Ensure with glue or tape that the uninitiated and the ingnorant do
not get exposed to plugs and sockets that are used the wrong way round

Wim

 

[John Fields]

On Thu, 28 Oct 2004 19:13:31 -0400, joto <a@a.com> wrote:

Hi, I need to turn off a certain electronic device X hours (3-4) after i
start it. I want this to happen automatically, so I need something that
goes between the device and the power outlet, which will automatically
switch off the juice after X hours, as if the device was unplugged. I
want it to be as easy to use as possible, so that there's just some dial
or some buttons where I can set the time after which the device is to be
turned off. It's running off of north american standard 120 V, 60 Hz, and
if the device is turned off reliably there could be a sfatey hazard.

What kind of thing would do the job/what's it called?

---
A timer, but if there could be a safety problem if it's turned off
reliably, I'd call it a problem.

--
John Fields

 

[JeffM]

turn off a certain electronic device X hours (3-4) after i start it
joto

Go to the electrical section of any good hardware store.
There are 24-hour timers that plug directly into a wall outlet for ~$4.
The resolution is about 3 minutes (lash of the mechanism).
I have seen many of these in second-hand stores.
I once found a Intermatic DT1 digital unit that has 1 second accuracy.

 

[Jerry Greenberg]

I needed something like this a number of years ago.

I went to a large hardware center, and bought an electronic
programable timer unit. It plugs in to the AC and then the load plugs
in to the timer. It is easy to program, and it can be programed to
perform a number of combintation of functions. I think I paid about
$40 or something like that.

The load is switched by a relay in this one, thus the load is isolated
from the AC line when it is turned off with the timer.

You cannot use anything that is dependent on the AC power to maintain
any setups in its memory. Many appliances and home entertainment
equipment must have the AC connected to it when it is in its off
condition.


Jerry G.
=========


joto <a@a.com> wrote in message news:<MPG.1beb472133651336989694@news.queensu.ca>...

Hi, I need to turn off a certain electronic device X hours (3-4) after i
start it. I want this to happen automatically, so I need something that
goes between the device and the power outlet, which will automatically
switch off the juice after X hours, as if the device was unplugged. I
want it to be as easy to use as possible, so that there's just some dial
or some buttons where I can set the time after which the device is to be
turned off. It's running off of north american standard 120 V, 60 Hz, and
if the device is turned off reliably there could be a sfatey hazard.

What kind of thing would do the job/what's it called?

Thanks.