digital timer relay switch, battry powered

Terry · May 2, 2004

I am looking for a 24 hour event timer that can switch off and on a battry
operated PIR MURS radio transmiter alarm (Dakota Alert). The pir transmiter
uses 6- 1.5 volt AA battries for a total of 9VDC power source. When the
battries are installed it is in sensing 24 hours a day. I use this on a
const. site and want it to be off during the day and back on at nite, but
have it done electronically with a selfcontained system. I don,t wand to
hookup a 120v timer to a 9 vdc converter to switch it. Need a self
contained, or self powered 9 volt timer that could be set for any time I
want, to switch every day and save battries.Mabey even be powered by the
battrie power pack of the murs transmiter. Is there any kind of timer relay
out there that would work for this?
Thanks
Terry

Fred Bloggs · May 2, 2004

Terry wrote:

I am looking for a 24 hour event timer that can switch off and on a battry
operated PIR MURS radio transmiter alarm (Dakota Alert). The pir transmiter
uses 6- 1.5 volt AA battries for a total of 9VDC power source. When the
battries are installed it is in sensing 24 hours a day. I use this on a
const. site and want it to be off during the day and back on at nite, but
have it done electronically with a selfcontained system. I don,t wand to
hookup a 120v timer to a 9 vdc converter to switch it. Need a self
contained, or self powered 9 volt timer that could be set for any time I
want, to switch every day and save battries.Mabey even be powered by the
battrie power pack of the murs transmiter. Is there any kind of timer relay
out there that would work for this?
Thanks
Terry

In your case, the simplest off-the-shelf solution would be an AC line
timer or photocell switch used to throw battery power onto the alarm
circuits. Assuming the alarm has an ON/OFF switch- the most unobtrusive
rig would look like so:
Please view in a fixed-width font such as Courier.

+---------------------+
PLUG | SKT |
__ | +-------+ PLUG
| \ | TIMER | ++ | __
AC ---| -------| | || ++ | | \
---| -------| -or- | || || | ---| -------+
PWR |__ / | | || ++ | ---| -----+ |
| | ++ | |__ / | |
| PHOTOCELL +-------+ | |
| | | |
ALARM +---------------------+ | |
+------------+ | |
| | +----------------------+ | |
| | | | 18GA | |
| | | 120VAC RELAY | LINE CORD | |
| | | +-------------+ | | |
| | | | | | | |
| o---------------- o o---------------------+ |
| ON/OFF | | | \ | | |
| SW | | | \ coil | | |
| o---------------- o \ | | |
| | | | o-----------------------+
| | | | | |
| | | +-------------+ |
| | | |
| | +------ UTILITY BOX----+
+------------+

Terry · May 2, 2004

The pir sensor murs radio transmiter dose not contain a on/off switch, but
is powered when the battries a put in the battry holder.
Is there such a thing as a 9vdc or low powered 12vdc, 6vdc, photocell switch
that could be uses as a relay switch in the battry pack line to the pir to
switch it on/ of dusk to dawn?
Trying to find prebuilt components, as I just have basic electronics
knoldege.
Tks
Terry
"Fred Bloggs" <nospam@nospam.com> wrote in message
news:40951867.8020602@nospam.com...

Terry wrote:
I am looking for a 24 hour event timer that can switch off and on a
battry
operated PIR MURS radio transmiter alarm (Dakota Alert). The pir
transmiter
uses 6- 1.5 volt AA battries for a total of 9VDC power source. When the
battries are installed it is in sensing 24 hours a day. I use this on a
const. site and want it to be off during the day and back on at nite,
but
have it done electronically with a selfcontained system. I don,t wand
to
hookup a 120v timer to a 9 vdc converter to switch it. Need a self
contained, or self powered 9 volt timer that could be set for any time I
want, to switch every day and save battries.Mabey even be powered by the
battrie power pack of the murs transmiter. Is there any kind of timer
relay
out there that would work for this?
Thanks
Terry

In your case, the simplest off-the-shelf solution would be an AC line
timer or photocell switch used to throw battery power onto the alarm
circuits. Assuming the alarm has an ON/OFF switch- the most unobtrusive
rig would look like so:
Please view in a fixed-width font such as Courier.

+---------------------+
PLUG | SKT |
__ | +-------+ PLUG
| \ | TIMER | ++ | __
AC ---| -------| | || ++ | | \
---| -------| -or- | || || | ---| -------+
PWR |__ / | | || ++ | ---| -----+ |
| | ++ | |__ / | |
| PHOTOCELL +-------+ | |
| | | |
ALARM +---------------------+ | |
+------------+ | |
| | +----------------------+ | |
| | | | 18GA | |
| | | 120VAC RELAY | LINE CORD | |
| | | +-------------+ | | |
| | | | | | | |
| o---------------- o o---------------------+ |
| ON/OFF | | | \ | | |
| SW | | | \ coil | | |
| o---------------- o \ | | |
| | | | o-----------------------+
| | | | | |
| | | +-------------+ |
| | | |
| | +------ UTILITY BOX----+
+------------+

Fred Bloggs · May 2, 2004

Yeah it's called a "wire"- put a break in one line of the battery pack
feed to the alarm and run this through the relay N.O.-COM contacts. If
you can't comprehend that- then stay away from it.

Terry wrote:

The pir sensor murs radio transmiter dose not contain a on/off switch, but
is powered when the battries a put in the battry holder.
Is there such a thing as a 9vdc or low powered 12vdc, 6vdc, photocell switch
that could be uses as a relay switch in the battry pack line to the pir to
switch it on/ of dusk to dawn?
Trying to find prebuilt components, as I just have basic electronics
knoldege.
Tks
Terry
"Fred Bloggs" <nospam@nospam.com> wrote in message
news:40951867.8020602@nospam.com...

Terry wrote:

I am looking for a 24 hour event timer that can switch off and on a

battry

operated PIR MURS radio transmiter alarm (Dakota Alert). The pir

transmiter

uses 6- 1.5 volt AA battries for a total of 9VDC power source. When the
battries are installed it is in sensing 24 hours a day. I use this on a
const. site and want it to be off during the day and back on at nite,

but

have it done electronically with a selfcontained system. I don,t wand

to

hookup a 120v timer to a 9 vdc converter to switch it. Need a self
contained, or self powered 9 volt timer that could be set for any time I
want, to switch every day and save battries.Mabey even be powered by the
battrie power pack of the murs transmiter. Is there any kind of timer

relay

out there that would work for this?
Thanks
Terry

In your case, the simplest off-the-shelf solution would be an AC line
timer or photocell switch used to throw battery power onto the alarm
circuits. Assuming the alarm has an ON/OFF switch- the most unobtrusive
rig would look like so:
Please view in a fixed-width font such as Courier.

+---------------------+
PLUG | SKT |
__ | +-------+ PLUG
| \ | TIMER | ++ | __
AC ---| -------| | || ++ | | \
---| -------| -or- | || || | ---| -------+
PWR |__ / | | || ++ | ---| -----+ |
| | ++ | |__ / | |
| PHOTOCELL +-------+ | |
| | | |
ALARM +---------------------+ | |
+------------+ | |
| | +----------------------+ | |
| | | | 18GA | |
| | | 120VAC RELAY | LINE CORD | |
| | | +-------------+ | | |
| | | | | | | |
| o---------------- o o---------------------+ |
| ON/OFF | | | \ | | |
| SW | | | \ coil | | |
| o---------------- o \ | | |
| | | | o-----------------------+
| | | | | |
| | | +-------------+ |
| | | |
| | +------ UTILITY BOX----+
+------------+

John Fields · May 2, 2004

On Sun, 2 May 2004 00:58:05 -0500, "Terry" <terry@swko.net> wrote:

I am looking for a 24 hour event timer that can switch off and on a battry
operated PIR MURS radio transmiter alarm (Dakota Alert). The pir transmiter
uses 6- 1.5 volt AA battries for a total of 9VDC power source. When the
battries are installed it is in sensing 24 hours a day. I use this on a
const. site and want it to be off during the day and back on at nite, but
have it done electronically with a selfcontained system. I don,t wand to
hookup a 120v timer to a 9 vdc converter to switch it. Need a self
contained, or self powered 9 volt timer that could be set for any time I
want, to switch every day and save battries.Mabey even be powered by the
battrie power pack of the murs transmiter. Is there any kind of timer relay
out there that would work for this?

---
You'd probably have to build something, and if you wanted to do it
without a ľC it might look something like this:

+-----+
+-------+ | _|
|SET ON |--|A A/B|-----------------------+
+-------+ | | +----------+ |
| MUX | | +-----+ | |
+-------+ | | +--|PR | | +-----+ | +-----+
|SET OFF|--|B Y|----|D TC|-+-| Q|--+--[C]--|ON |---O
+-------+ +-----+ | | | ÷2 _| |RELAY|
|COUNT| | Q|-----[C]--|OFF |---O
+-------+ | | +-----+ +-----+
| CLK |-------------|> |
+-------+ +-----+

Using CMOS 4000 family parts, (so you could use the 9V XMTR supply) a
32768 Hz clock, and 1 minute timing resolution, you'd need a 4060 and
a 40103 for the clock generator, eight 4-bit BCD switches and 14
pullup or pulldown resistors to set the ON time and OFF times, four
40257s for the 2:1 mux, two 40102s for counters, half of the 4013 for
the ÷2, and a couple of differentiators (shown as [C]) to drive the
relay, a single coil polarized latching type so it would only draw
coil current during the ÷2's transitions, and a few chips for glue
logic, which comes to about 12 chips.

The up side is that the only thing drawing any appreciable dynamic
current would be the 4060, and that would be microamps, so the timer
load on the 9V battery would be negligible.

But Ooops... I forgot...

Once the minutes counter times out the first time it has to be preset
to 60 thereafter to count off hours, so that's another couple of
muxers, which brings the chip count up to about 14.

Hmm... a ľC is starting to sound pretty attractive!

--
John Fields

John Fields · May 2, 2004

On Sun, 2 May 2004 12:26:40 -0500, "Terry" <terry@swko.net> wrote:

The pir sensor murs radio transmiter dose not contain a on/off switch, but
is powered when the battries a put in the battry holder.
Is there such a thing as a 9vdc or low powered 12vdc, 6vdc, photocell switch
that could be uses as a relay switch in the battry pack line to the pir to
switch it on/ of dusk to dawn?
Trying to find prebuilt components, as I just have basic electronics
knoldege.

---
Aaarghhh...

First it's you want to be able to set the ON and OFF time to any times
you want and now it's all you really want is a dusk and dawn sensor?

If you don't know what you're talking about, take it over to
sci.electronics.basic where it's OK to waste people's time.

--
John Fields

Fred Bloggs · May 2, 2004

Terry wrote:

I am looking for a 24 hour event timer that can switch off and on a battry
operated PIR MURS radio transmiter alarm (Dakota Alert). The pir transmiter
uses 6- 1.5 volt AA battries for a total of 9VDC power source. When the
battries are installed it is in sensing 24 hours a day. I use this on a
const. site and want it to be off during the day and back on at nite, but
have it done electronically with a selfcontained system. I don,t wand to
hookup a 120v timer to a 9 vdc converter to switch it. Need a self
contained, or self powered 9 volt timer that could be set for any time I
want, to switch every day and save battries.Mabey even be powered by the
battrie power pack of the murs transmiter. Is there any kind of timer relay
out there that would work for this?
Thanks
Terry

The cheapest and simplest thing I can think of, short of finding an
actual product, is to grab some experimental solar cells and a 3V relay
from Radio Shack, and hook this up so that sun goes down, solar cell
output drops , relay drops out and throws power to your alarm. Like so:
Please view in a fixed-width font such as Courier.
..
..
.. relay 3V coil +------+
.. +------------------+ | |
.. | | | +---+
.. | o -|---+ | | stack
.. | NC NO | | +---+
.. +-----|- o o / | | solar
.. | | coil| +---+
.. | | / | | | cells
.. | +--|---- o \ | +---+
.. | | | | | | for 3V
.. | | | COM o -|----+ .
.. | | | | | +---+
.. | | +------------------+ | | |
.. | | | +---+
.. | | | |
.. | | +-----+
.. | |
.. | |
.. | +---------------------------------------+
.. +--------------------------------------+ |
.. | |
.. | |
.. +-------------------------------------------------+ | |
.. | ------- + ------- + ------- + | | |
.. | | | | | | | | | |
.. | (-)---| ] | ] | ] --+ | | |
.. | | | | | | | | | | |
.. | ------- ------- ------- +-|-+ |
.. | alarm | |
.. | input +-|-----+
.. | + ------- + ------- + ------- | |
.. | | | | | | | | | / \
.. | (+)- [ | [ | [ | --+ | |
.. | | | | | | | | |
.. | ------- ------- ------- | |
.. +-------------------------------------------------+ |
.. BATTERY CRADLE |
.. |
.. BREAK CRADLE
.. LINK HERE
..

Fred Bloggs · May 2, 2004

Terry wrote:

I am looking for a 24 hour event timer that can switch off and on a battry
operated PIR MURS radio transmiter alarm (Dakota Alert). The pir transmiter
uses 6- 1.5 volt AA battries for a total of 9VDC power source. When the
battries are installed it is in sensing 24 hours a day. I use this on a
const. site and want it to be off during the day and back on at nite, but
have it done electronically with a selfcontained system. I don,t wand to
hookup a 120v timer to a 9 vdc converter to switch it. Need a self
contained, or self powered 9 volt timer that could be set for any time I
want, to switch every day and save battries.Mabey even be powered by the
battrie power pack of the murs transmiter. Is there any kind of timer relay
out there that would work for this?
Thanks
Terry

You should be able to find one of those 12V solar car battery chargers
that plugs into the cigarette lighter- then get yourself a screw base
12VDC relay, and possibly an ON/OFF toggle switch for override, modify
the alarm battery cradle, and you're done:
Please view in a fixed-width font such as Courier.

..
.. 12V SPDT or DPDT
..
.. RELAY +------+
.. +------------------+ | |
.. | | | +---+
.. | o -|---+ | |
.. | NC NO | | | |
.. +-----|- o o / | | |
.. | | coil|
.. | | / | 12V PANEL
.. | +--|---- o \ |
.. | | | | | | |
.. | | | COM o -|----+ | . |
.. | | | | | | |
.. | | +------------------+ | | |
.. | | | +---+
.. | | | |
.. | | +-----+
.. | |
.. | +---------------------------------------+
.. +--------------------------------------+ |
.. | |
.. | |
.. +---|---|---+
.. OVER-RIDE------> ON/OFF | | | |
.. ( TURN ON TO) SWITCH | o o |
.. ( OVERRIDE ) | | | |
.. +---|---|---+
.. | |
.. +-------------------------------------------------+ | |
.. | ------- + ------- + ------- + | | |
.. | | | | | | | | | |
.. | (-)---| ] | ] | ] --+ | | |
.. | | | | | | | | | | |
.. | ------- ------- ------- +-|-+ |
.. | alarm | |
.. | input +-|-----+
.. | + ------- + ------- + ------- | |
.. | | | | | | | | | / \
.. | (+)- [ | [ | [ | --+ | |
.. | | | | | | | | |
.. | ------- ------- ------- | |
.. +-------------------------------------------------+ |
.. BATTERY CRADLE |
.. |
.. BREAK CRADLE
.. LINK HERE
..
..
..
..
..

Fred Bloggs · May 2, 2004

Fred Bloggs wrote:

Terry wrote:

I am looking for a 24 hour event timer that can switch off and on a
battry
operated PIR MURS radio transmiter alarm (Dakota Alert). The pir
transmiter
uses 6- 1.5 volt AA battries for a total of 9VDC power source. When the
battries are installed it is in sensing 24 hours a day. I use this on a
const. site and want it to be off during the day and back on at nite, but
have it done electronically with a selfcontained system. I don,t wand to
hookup a 120v timer to a 9 vdc converter to switch it. Need a self
contained, or self powered 9 volt timer that could be set for any time I
want, to switch every day and save battries.Mabey even be powered by the
battrie power pack of the murs transmiter. Is there any kind of timer
relay
out there that would work for this?
Thanks
Terry

You should be able to find one of those 12V solar car battery chargers
that plugs into the cigarette lighter- then get yourself a screw base
12VDC relay, and possibly an ON/OFF toggle switch for override, modify
the alarm battery cradle, and you're done:
Please view in a fixed-width font such as Courier.

.
. 12V SPDT or DPDT
.
. RELAY +------+
. +------------------+ | |
. | | | +---+
. | o -|---+ | |
. | NC NO | | | |
. +-----|- o o / | | |
. | | coil|
. | | / | 12V PANEL
. | +--|---- o \ |
. | | | | | | |
. | | | COM o -|----+ | . |
. | | | | | | |
. | | +------------------+ | | |
. | | | +---+
. | | | |
. | | +-----+
. | |
. | +---------------------------------------+
. +--------------------------------------+ |
. | |
. | |
. +---|---|---+
. OVER-RIDE------> ON/OFF | | | |
. ( TURN ON TO) SWITCH | o o |
. ( OVERRIDE ) | | | |
. +---|---|---+
. | |
. +-------------------------------------------------+ | |
. | ------- + ------- + ------- + | | |
. | | | | | | | | | |
. | (-)---| ] | ] | ] --+ | | |
. | | | | | | | | | | |
. | ------- ------- ------- +-|-+ |
. | alarm | |
. | input +-|-----+
. | + ------- + ------- + ------- | |
. | | | | | | | | | / \
. | (+)- [ | [ | [ | --+ | |
. | | | | | | | | |
. | ------- ------- ------- | |
. +-------------------------------------------------+ |
. BATTERY CRADLE |
. |
. BREAK CRADLE
. LINK HERE
.
.
.
.
.

This is what I'm talking about- whatever you find just match it with
same relay voltage:
http://www.batteries.com/productprofile.asp?appid=230301&prodid=11499&drilldown=230301&mfgdsc=&mfgcode=&modelno=&groupname=Solar+Chargers&groupcode=CHARGE

Colubris · May 2, 2004

"Terry" <terry@swko.net> wrote in message news:<hKadnTdp5IaFEgndRVn-gg@adelphia.com>...

I am looking for a 24 hour event timer that can switch off and on a battry
operated PIR MURS radio transmiter alarm (Dakota Alert). The pir transmiter
uses 6- 1.5 volt AA battries for a total of 9VDC power source. When the
battries are installed it is in sensing 24 hours a day. I use this on a
const. site and want it to be off during the day and back on at nite, but
have it done electronically with a selfcontained system. I don,t wand to
hookup a 120v timer to a 9 vdc converter to switch it. Need a self
contained, or self powered 9 volt timer that could be set for any time I
want, to switch every day and save battries.Mabey even be powered by the
battrie power pack of the murs transmiter. Is there any kind of timer relay
out there that would work for this?
Thanks
Terry

Hi Terry,
How about hacking a "digital appliance timer". They're meant to switch
AC loads, but many varieties can also be used to switch low voltage
loads - or can be modified as needed.
Rat Shack sells some, and Intermatic has some useful models too.

Arch

Joerg · May 2, 2004

Hi Terry,

Here is a simple solution: Use an analog quartz alarm clock (used to be about $7
at Longs Drugs). Open the contact switch wiring. Hook up a long CMOS counter
which can be done in one single chip. Look up the MC14521 which I believe has
the gates for the oscillator in there and includes the long counter. Power
consumption is minimal and the voltage is non-critical, 9V is just fine. Then
configure it to run from contact closure which is set to end of workday to
whenever work resumes.

You have to make sure the clock can tolerate this surgery and that it's all
reliable.

Even simpler: Then there are the battery operated irrigation valves. About $50
or so at Home Depot. If you disable the valve part and figure out to connect to
the innards, some can be programmed to "water" from, say, 6:00pm to 7:00am or
whatever you program in there. These have the advantage that you can reprogram
them via push buttons when, for example, an extra shift is scheduled one day.
Just get one that's easy to program and can run this long.

Regards, Joerg
http://www.analogconsultants.com

Joerg · May 2, 2004

Terry, just one addendum: Some of those irrigation timers have an open and close
function so they don't eat batteries while holding a valve coil, which means
that you'd need a simple set-reset flip flop at the output. But that can be done
with a couple transistors and four resistors.

Regards, Joerg
http://www.analogconsultants.com

The Other John Smith · May 3, 2004

"Joerg" <notthisjoergsch@removethispacbell.net> wrote in message
news:40958BD3.C202FBC5@removethispacbell.net...

Terry, just one addendum: Some of those irrigation timers have an open and
close
function so they don't eat batteries while holding a valve coil, which
means
that you'd need a simple set-reset flip flop at the output. But that can
be done
with a couple transistors and four resistors.

Regards, Joerg
http://www.analogconsultants.com

Also, make sure you can water that long before you buy. The two I've owned
had a maximum of 4 hours watering as I recall. A safety feature, they say.

Regards,
John

digital timer relay switch, battry powered

Terry

Guest

Fred Bloggs

Guest

Terry

Guest

Fred Bloggs

Guest

John Fields

Guest

John Fields

Guest

Fred Bloggs

Guest

Fred Bloggs

Guest

Fred Bloggs

Guest

Colubris

Guest

Joerg

Guest

Joerg

Guest

The Other John Smith

Guest

Welcome to EDABoard.com

Sponsor

Online statistics

Forum statistics

digital timer relay switch, battry powered

Terry

Guest

Fred Bloggs

Guest

Terry

Guest

Fred Bloggs

Guest

John Fields

Guest

John Fields

Guest

Fred Bloggs

Guest

Fred Bloggs

Guest

Fred Bloggs

Guest

Colubris

Guest

Joerg

Guest

Joerg

Guest

The Other John Smith

Guest

Log in

Welcome to EDABoard.com

Sponsor