Timer Question
 

Anyone make an off-the-shelf timer that I can trigger and it'll run
for X-hours then operate a relay?

Or do I have to roll my own?

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: skypeanalog | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

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

Timer Question
 

On Mon, 02 Jun 2014 16:43:22 -0700, Jim Thompson
wrote:

Anyone make an off-the-shelf timer that I can trigger and it'll run
for X-hours then operate a relay?

Or do I have to roll my own?

...Jim Thompson

---
http://www.grainger.com/search?searchQuery=timer

Timer Question
 

On Mon, 02 Jun 2014 19:19:32 -0500, John Fields
wrote:

On Mon, 02 Jun 2014 16:43:22 -0700, Jim Thompson
wrote:

Anyone make an off-the-shelf timer that I can trigger and it'll run
for X-hours then operate a relay?

Or do I have to roll my own?

...Jim Thompson

---
http://www.grainger.com/search?searchQuery=timer

I want something I can _trigger_, preferably _retriggerable_, off the
shelf. I could do my own, but I'm lazy ;-)

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: skypeanalog | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

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

Timer Question
 

In article , To-Email-Use-
says...

Anyone make an off-the-shelf timer that I can trigger and it'll run
for X-hours then operate a relay?

Or do I have to roll my own?

...Jim Thompson

http://www.newark.com/magnecraft/tdr...elay-dpdt-10h-
120vac/dp/69H7951

You'll also need a socket..

Jamie

Timer Question
 

"Jim Thompson" wrote in
message ...
Anyone make an off-the-shelf timer that I can trigger and it'll run
for X-hours then operate a relay?

Or do I have to roll my own?

...Jim Thompson



http://www.altronix.com/products/ins...tions/6062.pdf

Timer Question
 

Jim Thompson wrote:



I want something I can _trigger_, preferably _retriggerable_, off the
shelf. I could do my own, but I'm lazy ;-)

...Jim Thompson
This is a classic industrial control component, there are thousands of
variations. The retriggerable thing constrains the number of modules
that will work for this case, but I'm pretty sure that many of the
modules have such an option.

Jon

Timer Question
 

On 6/2/2014 7:43 PM, Jim Thompson wrote:
Anyone make an off-the-shelf timer that I can trigger and it'll run
for X-hours then operate a relay?

Or do I have to roll my own?

...Jim Thompson


Start with something like this for $5.00:
http://www.harborfreight.com/lamp-an...mer-40148.html
and add whatever roll your own trigger you want. Plug a wall
wart into it to power the relay.

Ed

Timer Question
 

On Wed, 04 Jun 2014 02:03:47 -0400, ehsjr wrote:

On 6/2/2014 7:43 PM, Jim Thompson wrote:
Anyone make an off-the-shelf timer that I can trigger and it'll run
for X-hours then operate a relay?

Or do I have to roll my own?

...Jim Thompson


Start with something like this for $5.00:
http://www.harborfreight.com/lamp-an...mer-40148.html
and add whatever roll your own trigger you want. Plug a wall
wart into it to power the relay.

Ed

How do you _retrigger_ a mechanical timer ?:-)

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: skypeanalog | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

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

Timer Question
 

In sci.electronics.basics Jim Thompson wrote:
Anyone make an off-the-shelf timer that I can trigger and it'll run
for X-hours then operate a relay?

Or do I have to roll my own?

You can buy them. I'd start with Panasonic- they're cheaper than omron,
and usually less complex to deal with.

their support is complete garbage though, not that you'd need it for a
timer. Keep in mind that programming the digitals ones can be infuriating
and involves map folded, poorly translated, japanese sofware logic with
bonus 7 other irrelevant dead languages datasheets.

here's the start page

http://pewa.panasonic.com/automation-controls/timers/

If accuracy is not critical, the versions with dial are easy.

these things tend to be cheapest off ebay of all places. Grainger will
take you for a serious ride if you go that route.

Timer Question
 

On Wed, 4 Jun 2014 18:04:11 +0000 (UTC), Cydrome Leader
wrote:

In sci.electronics.basics Jim Thompson wrote:
Anyone make an off-the-shelf timer that I can trigger and it'll run
for X-hours then operate a relay?

Or do I have to roll my own?

You can buy them. I'd start with Panasonic- they're cheaper than omron,
and usually less complex to deal with.

their support is complete garbage though, not that you'd need it for a
timer. Keep in mind that programming the digitals ones can be infuriating
and involves map folded, poorly translated, japanese sofware logic with
bonus 7 other irrelevant dead languages datasheets.

here's the start page

http://pewa.panasonic.com/automation-controls/timers/

If accuracy is not critical, the versions with dial are easy.

these things tend to be cheapest off ebay of all places. Grainger will
take you for a serious ride if you go that route.

Everyone is missing that key word "trigger". I need to hit it with a
pulse and have it run for X-hours, then reset... and wait for the next
trigger.... maybe just a pile of 74HC283's

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: skypeanalog | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

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

Timer Question
 

Everyone is missing that key word "trigger". I need to hit it with a
pulse and have it run for X-hours, then reset... and wait for the next
trigger.... maybe just a pile of 74HC283's

...Jim Thompson


Jim,

http://www.mcmaster.com/#additional-relays/=s9jqfn

Has 8 different timing functions. You could use the "Interval" function.
Apply power and it starts to time for the desired delay and then turns off.
To restart, re-apply power. Regardless, one of the other functions may work
better for your application.

I would suggest searching McMaster Carr, WW Grainger sites for a suitable
delay timer for the voltage and function you desire.

Mfg's that comes to mind Omron, SSAC, Omega, Veeder Root, Eagle Signal, etc
etc.

http://www.ssac.com/products.php?cat=22

Les

Timer Question
 

In sci.electronics.basics Jim Thompson wrote:
On Wed, 4 Jun 2014 18:04:11 +0000 (UTC), Cydrome Leader
wrote:

In sci.electronics.basics Jim Thompson wrote:
Anyone make an off-the-shelf timer that I can trigger and it'll run
for X-hours then operate a relay?

Or do I have to roll my own?

You can buy them. I'd start with Panasonic- they're cheaper than omron,
and usually less complex to deal with.

their support is complete garbage though, not that you'd need it for a
timer. Keep in mind that programming the digitals ones can be infuriating
and involves map folded, poorly translated, japanese sofware logic with
bonus 7 other irrelevant dead languages datasheets.

here's the start page

http://pewa.panasonic.com/automation-controls/timers/

If accuracy is not critical, the versions with dial are easy.

these things tend to be cheapest off ebay of all places. Grainger will
take you for a serious ride if you go that route.

Everyone is missing that key word "trigger". I need to hit it with a
pulse and have it run for X-hours, then reset... and wait for the next
trigger.... maybe just a pile of 74HC283's

yes, you can trigger any of these, they're fully electronic- even the ones
with the clear knob.

Timer Question
 

On Wed, 04 Jun 2014 07:13:26 -0700, Jim Thompson
wrote:

On Wed, 04 Jun 2014 02:03:47 -0400, ehsjr wrote:

On 6/2/2014 7:43 PM, Jim Thompson wrote:
Anyone make an off-the-shelf timer that I can trigger and it'll run
for X-hours then operate a relay?

Or do I have to roll my own?

...Jim Thompson


Start with something like this for $5.00:
http://www.harborfreight.com/lamp-an...mer-40148.html
and add whatever roll your own trigger you want. Plug a wall
wart into it to power the relay.

Ed

How do you _retrigger_ a mechanical timer ?:-)

Give its knob another twist.

Timer Question
 

On Wed, 04 Jun 2014 11:10:24 -0700, Jim Thompson
wrote:

On Wed, 4 Jun 2014 18:04:11 +0000 (UTC), Cydrome Leader
wrote:

In sci.electronics.basics Jim Thompson wrote:
Anyone make an off-the-shelf timer that I can trigger and it'll run
for X-hours then operate a relay?

Or do I have to roll my own?

You can buy them. I'd start with Panasonic- they're cheaper than omron,
and usually less complex to deal with.

their support is complete garbage though, not that you'd need it for a
timer. Keep in mind that programming the digitals ones can be infuriating
and involves map folded, poorly translated, japanese sofware logic with
bonus 7 other irrelevant dead languages datasheets.

here's the start page

http://pewa.panasonic.com/automation-controls/timers/

If accuracy is not critical, the versions with dial are easy.

these things tend to be cheapest off ebay of all places. Grainger will
take you for a serious ride if you go that route.

Everyone is missing that key word "trigger". I need to hit it with a
pulse and have it run for X-hours, then reset... and wait for the next
trigger.... maybe just a pile of 74HC283's

...Jim Thompson
Not many 'retriggerable' ones there.
Roll your own, 1sec oscilliator fed into a couple of 4017's?
I have a simple one that does 2 4 &8 hrs.

Cheers

Timer Question
 

In article ,
Jim Thompson writes:

Everyone is missing that key word "trigger". I need to hit it with a
pulse and have it run for X-hours, then reset... and wait for the next
trigger.... maybe just a pile of 74HC283's

If you are happy writing a bit of software, one of the really
tiny micros will do whatever you want in this area.

PICs and AVRs come in 8 pin packages with a reasonably good
internal clock so one chip is all you need. No xtal, no Rs and Cs
for timing...

--
These are my opinions. I hate spam.

Timer Question
 

On 6/4/2014 10:13 AM, Jim Thompson wrote:
On Wed, 04 Jun 2014 02:03:47 -0400, ehsjr wrote:

On 6/2/2014 7:43 PM, Jim Thompson wrote:
Anyone make an off-the-shelf timer that I can trigger and it'll run
for X-hours then operate a relay?

Or do I have to roll my own?

...Jim Thompson


Start with something like this for $5.00:
http://www.harborfreight.com/lamp-an...mer-40148.html
and add whatever roll your own trigger you want. Plug a wall
wart into it to power the relay.

Ed

How do you _retrigger_ a mechanical timer ?:-)

...Jim Thompson


A flip flop and a one shot:

Modify it to stop after 24 hours. Your roll your own trigger
circuit (FF + triac, relay, whatever) latches on, but you'll
need to add something mechanical to the appliance timer to reset
your circuit when the timer reaches 24 on the dial.
Functional diagram:

-----------
input pulse---|Jim circuit| -----
| | |Timer|---timer ac out---relay
AC in---|ACin ACout|------| |
| | | |---+
----------- ----- |
| |
+---------Reset--------+

Input pulse to flip flop, one shot to reset it comes to mind,
but I'll call it your circuit as it will include more than
a flip flop.

The input pulse turns your circuit on, which sends ac to the
timer, starting it. After the timer has produced AC out to
the relay for the amount of time you set, it drops timer ac out,
but keeps turning, because your circuit has not been reset.

If you can mod the timer to trigger a one shot when the dial
hits 24 to produce a reset signal to turn your circuit off, that
will leave the timer at 24, awaiting the next trigger pulse.

Your original post mentioned a duration of up to 23 hours,
implying an interval between trigger pulses of greater than one
day. If that interval is less than a day or you can't mod the
timer, then this approach is no good for you.

Ed

Timer Question
 

On Wed, 04 Jun 2014 11:10:24 -0700, Jim Thompson
wrote:

On Wed, 4 Jun 2014 18:04:11 +0000 (UTC), Cydrome Leader
wrote:

In sci.electronics.basics Jim Thompson wrote:
Anyone make an off-the-shelf timer that I can trigger and it'll run
for X-hours then operate a relay?

Or do I have to roll my own?

You can buy them. I'd start with Panasonic- they're cheaper than omron,
and usually less complex to deal with.

their support is complete garbage though, not that you'd need it for a
timer. Keep in mind that programming the digitals ones can be infuriating
and involves map folded, poorly translated, japanese sofware logic with
bonus 7 other irrelevant dead languages datasheets.

here's the start page

http://pewa.panasonic.com/automation-controls/timers/

If accuracy is not critical, the versions with dial are easy.

these things tend to be cheapest off ebay of all places. Grainger will
take you for a serious ride if you go that route.

Everyone is missing that key word "trigger". I need to hit it with a
pulse and have it run for X-hours, then reset... and wait for the next
trigger.... maybe just a pile of 74HC283's

...Jim Thompson

---
Maybe, but hey, it's kinda slow around here... If you like, I'll
build one for you, all hardware...

1. Power source: mains, batteries, ???

2. Timeout: If fixed,period? If settable/programmable, min/max
periods?

3. Accuracy?

4. Trigger/retrigger source?

5. Relay contact ratings?

Email me if you're interested.

John Fields