I am looking for a 12-volt cycle timer. I need it to turn on and off 1
Fan PHB-3a, 12v, and 2 light Bulbs 12v single pole at the same time.
Approximate cycle time 15-90 min. the timer needs to be very small and
inexpensive. I'm going to use it in a new product. It can be an
internal timer or I would prefer a timer with an external button to
push and start the timer.

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Request for Question Clarification by pafalafa-ga on 03 Jul 2003 17:45 PDT

Hello mjr-ga,

It's an interesting question you've put forward.  Perhaps one of the
researchers here knows the answer to what you need right off the top
of their heads.  If so, great.  But for me, at least, it will take a
good deal of poking around, and a bit of back and forth dialogue to
pinpoint just what you need.

So...do me a favor please, and have a look here:

http://www.ab.com/industrialcontrols/products/relays_timers_and_temp_controllers/general_purpose_timers_and_counters/700-hnc.html

at the description for the "700-HNC Miniature Timer".  Note that
there's a button there that you can click on for specifications.

What I'd like to know from you is WHY this timer doesn't meet your
needs (I'm presuming it won't -- they never do on the first attempt!).

By giving us some detailed feedback about what is right, and what is
wrong, with this particular item, it will help us to focus our
research efforts and get you just what you're looking for.

Thanks a lot.

pafalafa-ga

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Request for Question Clarification by pafalafa-ga on 28 Jul 2003 08:01 PDT

Please take a look at the following link and let me know if this
product meets your needs:

http://www.melexis.com/prodmain.asp?category=timer&family=MLX90721

Thanks.

pafalafa-ga

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Request for Question Clarification by pafalafa-ga on 30 Jul 2003 17:33 PDT

...and this also this one here, which I believe can work with DC or AC
power supplies:

http://www.lsicsi.com/products_files/body_products-catalog.html

Automatic Shutoff Timer  (3 Pins; 4 Pins; 8 Pins)   NEW! 
ASOT; ASOTR, ASOTT; ASOTRI, ASOTTI
v      Mask Programmable:
50 shutoff times; 2.5 minutes to 32 hours
14 duty cycles: 5% to 37.5%
v      Duty cycle output directly drives relay coil
v      Factory calibrated for accuracy
v      Minimum external circuitry:
R, C, rectifying diode, flyback diode, switch
v      Operates to 80V, minimizing external power dissipation
v      Very Cost-effective
v      Ideal for auto shutoff of:  Household appliances; Heaters;
Lighting; AC motors


These type of chips tend to run in the $3-4 range.

Let me know if either of them work out for you.

pafalafa-ga

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Clarification of Question by mjr-ga on 31 Jul 2003 10:17 PDT

I think you might have something here.
Were checking it out.
Thanks
MJR

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Request for Question Clarification by pafalafa-ga on 31 Jul 2003 10:49 PDT

Excellent!  Post a message here to let me know if you need any
additional information about either (or both) of the timers.  And by
all means, let me know how things work out.

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Request for Question Clarification by pafalafa-ga on 01 Aug 2003 11:29 PDT

Hello again,

I hope you don't mind, but I wanted to point out that this question is
set to expire tomorrow (Saturday, August 2).

If you find out by then that the links I gave you will provide you the
timer that you need, please let me know so that I can post them as an
answer, and collect the fee that you have offered.

If the question does expire before you get any feedback on the timers,
you can always post a new question to my attention if you want to
continue our dialogue in any way.

Thanks and as always, good luck.

Hello - I am unable to provide you with a designed circuit with parts
under $5.  I will have the editors reopen your question.  For the
benefit of other researchers, I have added our conversation as a
comment below:

Hello, 
 
There are many different ways to go with this one, depending on the
size range, the complexity of the timer, and how "finished" you want
the timer to be.
 
=-=-=-=-=-=-=-=-=-=-=-=-=-=-= 
Prebuilt selections - these are more expensive, but would be almost
plug-and-play:
 
This site lists a collection of small timers which will work with your
voltage specifications and offer a variety of bells and whistles and
start and stop buttons (various programming modes, etc):
http://www.advancedmanufacturing.com/omron_3.htm 
 
Another site with small timers starting at $60 - these two come with a
variety of timing ranges and programming options as well as start and
stop buttons:
http://www.automatictiming.com/pages_atc/116th_din.html#407 
 
A site listing a single timer that would appear to be quite similar to
those in the previous two links, no price given:
http://www.process-controls.com/HCS/hcs_multifunction_timer.html 
 
A fancier, small, programmable timer: 
http://www.artisancontrols.com/products/2601sa.htm 
 
Another small, DIN mounted cycle timer: 
http://www.thomasregister.com/olc/regentcontrols/htm10132.htm 
 
More small, DIN mounted cycle timers: 
http://www.issc-kanson.com/DINtimer.htm 
 
The spec sheet on another product line of small timers: 
http://www.idom.ru/files/Omron/Components/Datasheets/Industrial%20Timers/h3cr-f.pdf
 
A very tiny, double cycle timer: 
http://instrumentation-central.com/ATC/342.pdf 
 
 
 
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= 
Cycle timer relays, chips, etc - these are the parts that would allow
you to build a cycle timer into your product - this would require more
work on your part to design and customize the circuit, but, they come
at a much cheaper price:
 
This controller should do what you want: 
http://www.artisancontrols.com/pdf/4615.pdf 
 
A selection of timing relays: 
http://www.connex-electronics.com/?url=/html/products/finder_main_select.html
 
The class 222 family of timing relays should do as you ask: 
http://www.magnecraft.com/products/section4_12.pdf 
 
 
 
Please let me know if you require further clarification. 
 
 
Google search 
"cycle timer" 
miniature "cycle timer" 
"cycle timer" relay 
"cycle timer" mechanical 
"cycle timer" electronic 
"cycle timer" 12vdc 
"cycle timer" automotive 
"cycle timer" solar
 

--------------------------------------------------------------------------------
Request for Answer Clarification by mjr-ga on 14 Jul 2003 16:45 PDT 
Hello, 
 
  There was only one of the sites that you suggested that had anything
close to what I need (http://www.artisancontrols.com) however, it was
way too expensive.  I need to find something that is < $5.00. or less.
  I may not really need a timer.  Let me explain what I need this to
do.
I am designing a product that is going to have a three position switch
on the outside of the product. (1) Off, (2) fan only, (3) fan and
light's.
 What I would like is for the unit to 
shut off after about 60 min. The time is not critical at all, I only
need
it to shut off in case they forget so the battery doesn't go dead. I
guess
its more of a shut off then a timer. This shut off will be located on
the
inside of the unit,so I don't care what it looks like. The size of the
one on this site is fine.
 

--------------------------------------------------------------------------------
Clarification of Answer by synarchy-ga on 15 Jul 2003 20:54 PDT 
Hello - please let me know if these are closer to what you are looking
for - ie would you rather have a switch type device (like the last
several) or a circuit to which you connect your own switch (like the
first few).  If need be, I will provide you with a circuit diagram
where parts should approach the $5 limit that you want.
 
 
Here is a kit for a multi-function timer-relay, more bells and
whistles than you're after, for $21.95:
://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=fan%2Flight+time+delay
 
Here's the product, but for too much - $71: 
://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=fan%2Flight+time+delay
 
Here is a product that I think meets what you want from a product,
although it is more expensive (and while rated at 120V, it should
still work at 12V - the timer is not controlled by the voltage, the
rating applies to what it could carry across the contacts).
http://www.efi.org/products/power/fandelay.html 
 
And another similar device, with no price given: 
http://mhrhodes.com/42series/42.html 
 
And another, albeit even more expensive than the first: 
http://www.rewci.com/fandetisw.html 
 
A similar question posted on a different forum that suggests four
options from $20-$250:
://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=fan%2Flight+time+delay
  
Potentially of interest, here is a schematic for a battery
power-off-delay circuit that could be customized for your purpose:
://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=fan%2Flight+time+delay
 

--------------------------------------------------------------------------------
Request for Answer Clarification by mjr-ga on 16 Jul 2003 10:13 PDT 
Hello again, 
These are not what I’m looking for. I’m looking for something as small
As possible, and the least amount of bells and whistles, I would like
to use my own switch, also as cheep as possible. A circuit diagram
sounds good. We will be building thousands of these so if I had a very
simple circuit I could have them built for me or build them ourselves.
We are talking about a small circuit board with diodes and resisters
ect.Right. I really suck at e-mails If its not against the rules I
could give you my phone # and we could talk on the phone or I could
call you.
Thanks A Lot 
MJR
 

--------------------------------------------------------------------------------
Clarification of Answer by synarchy-ga on 18 Jul 2003 22:07 PDT 
Hi - 
 
In response to your question, I'm having a circuit designed - should
have it done by the end of this weekend - we will try and have the
total parts cost down around $5 based upon the assumption of several
thousand pieces.
 

--------------------------------------------------------------------------------
Request for Answer Clarification by mjr-ga on 19 Jul 2003 13:23 PDT 
Thanks, 
 
Sounds good,  
Cheers 
MJR