Need design for motion sensor battery operated LED light.

[[email protected]]

Anyone have a design for a motion sensor? Sure, I could just buy the
sensor for an outdoor motion sensor light, but I want a circuit to
control a *battery operated* LED light. The purpose is to illuminate
the inside of an outhouse (toilet) at a campground, and have it turn ON
when someone enters. There is no electricity in the building. I just
want something battery operated that wont be switched on by the campers
and left turned on to drain the batteries when they leave the outhouse.
It should illuminate when they enter, and turn off shortly after they
leave.

I'm thinking in terms of those stick on LED lights sold for closets and
stuff, except I want it motion sensored.

Or, is there already a device made that does this?
(Something with a solar cell charger, and rechargable batteries would be
even better, but the solar charger would need to be outside the
building).

The other idea is to buy a ready made circuit board and install it in my
own light..... Do they sell such a thing? I'd rather not have to build
the board if possible, but I'm open to options!

 

[Sjouke Burry]

Microswitch under the floorboards and/(or both) the seat-area,
uses no energy, and shuts down immediately.
Your motiondetector will be a continious drain on the battery.

 

[[email protected]]

Anyone have a design for a motion sensor? Sure, I could just buy the

sensor for an outdoor motion sensor light, but I want a circuit to

control a *battery operated* LED light. The purpose is to illuminate

the inside of an outhouse (toilet) at a campground, and have it turn ON

when someone enters. There is no electricity in the building. I just

want something battery operated that wont be switched on by the campers

and left turned on to drain the batteries when they leave the outhouse.

It should illuminate when they enter, and turn off shortly after they

leave.



I'm thinking in terms of those stick on LED lights sold for closets and

stuff, except I want it motion sensored.



Or, is there already a device made that does this?

(Something with a solar cell charger, and rechargable batteries would be

even better, but the solar charger would need to be outside the

building).



The other idea is to buy a ready made circuit board and install it in my

own light..... Do they sell such a thing? I'd rather not have to build

the board if possible, but I'm open to options!

This product exists

http://www.aliexpress.com/item/Free...-Auto-Keyhole-Sensor-Led-Light/612788589.html

I'm sure that's not the only way to get it.

 

[[email protected]]

How about a switch on the door, that lights things up for, say, 20
minutes?

Or just use a lithium battery and a good LED and leave it on. That can
last years. James has a circuit that will turn it off when there's
ambient light, roughly doubling the battery life.

Or google: battery powered motion sensing light

Thank for both replies. The switch under the floor is an interesting
idea, but I'd probably have to do some major changes to the floor, or
have a double floor. All of that seems like too much work. The switch
under the toilet seat is an excellent idea in a women's outhouse, but
wont work for the men who use the urinal.

This leaves the door switch. I like that, but how do I make it shut off
after _x_ minutes?

I did do some googling and found that there are both solar powered and
motion sensing battery lights. I had tried that earlier using other
search words and got nothing. I like this one the best so far.....
http://www.newegg.com/Product/Product.aspx?Item=N82E16882021177
Seems simple, will recharge with solar panel, and is not real costly.
I'd think that the solar panel will offset any drain from the motion
sensing circuitry.

How can a lithium battery really run a LED for years? I have used some
of those small cheap teacup LED candles that flicker and look like a
real candle. They are only one LED, and run on a CR2032 lithium
battery. After leaving them on overnight for several days, the battery
is dead.

 

[[email protected]]

Anyone have a design for a motion sensor? Sure, I could just buy the

sensor for an outdoor motion sensor light, but I want a circuit to

control a *battery operated* LED light. The purpose is to illuminate

the inside of an outhouse (toilet) at a campground, and have it turn ON

when someone enters. There is no electricity in the building. I just

want something battery operated that wont be switched on by the campers

and left turned on to drain the batteries when they leave the outhouse.

It should illuminate when they enter, and turn off shortly after they

leave.



I'm thinking in terms of those stick on LED lights sold for closets and

stuff, except I want it motion sensored.



Or, is there already a device made that does this?

(Something with a solar cell charger, and rechargable batteries would be

even better, but the solar charger would need to be outside the

building).



The other idea is to buy a ready made circuit board and install it in my

own light..... Do they sell such a thing? I'd rather not have to build

the board if possible, but I'm open to options!

http://www.walmart.com/ip/Good-Choice-LED-Egg-Shaped-Motion-Sensor-Night-Light/17279128

Also Lowes and HomeDepot carry similar, in same price range, more or less, name brand stuff like Sylvania.

 

[Jasen Betts]

Anyone have a design for a motion sensor? Sure, I could just buy the
sensor for an outdoor motion sensor light, but I want a circuit to
control a *battery operated* LED light. The purpose is to illuminate
the inside of an outhouse (toilet) at a campground, and have it turn ON
when someone enters. There is no electricity in the building. I just
want something battery operated that wont be switched on by the campers
and left turned on to drain the batteries when they leave the outhouse.
It should illuminate when they enter, and turn off shortly after they
leave.

put a microswith where the door lock will activate it, or install one
of those slow momentary button switches.

 

[mike]

This product exists

http://www.aliexpress.com/item/Free...-Auto-Keyhole-Sensor-Led-Light/612788589.html

I'm sure that's not the only way to get it.

Looks like a cool device. I'd worry somewhat about maintenance. CR2032
are expensive and short lived.
You can fix that with bigger batteries and a solar charger.
But that dramatically reduces the MTBS...mean time before stolen.

 

[Anna Joshi]

The Do's & Don'ts of an Engineering student.

Subscribe for more footage.

 

[[email protected]]

This leaves the door switch. I like that, but how do I make it shut off
after _x_ minutes?

Use a battery with low internal resistance and a supercap. There are
lots of bicycle dynamo-powed lights that use a supercap for a few
minutes of illumination; maybe you could dump enough into the cap during
the time the door is open.

 

[George Herold]

How about a switch on the door, that lights things up for, say, 20
minutes?

That was my suggestion. keep it simple.

Most campers will have a flash light and won't need the led.

George H.

 

[Charlie E.]

My father's favorite teenage stunt was to move the outhouse away from
the hole, set a bonfire about 10' behind the hole, then yell "fire"
;-)

I don't know what the light problem is. As I recall, from actual
experience, if you're going to the outhouse after dark, you'd be
carrying a kerosene lantern (today, it'd be a flashlight... you don't
want to step on a snake

...Jim Thompson

Hmmm.. Maybe a door mounted light, with either a microswitch to detect
it opening, or just a little ball bearing thing to detect the motion
to trigger a little 555 timer thing. Door opens, it stays lit for
five minutes. It it goes out, you kick the door, and it lights up
again... ;-)

 

[gregz]

Anyone have a design for a motion sensor? Sure, I could just buy the
sensor for an outdoor motion sensor light, but I want a circuit to
control a *battery operated* LED light. The purpose is to illuminate
the inside of an outhouse (toilet) at a campground, and have it turn ON
when someone enters. There is no electricity in the building. I just
want something battery operated that wont be switched on by the campers
and left turned on to drain the batteries when they leave the outhouse.
It should illuminate when they enter, and turn off shortly after they
leave.

I'm thinking in terms of those stick on LED lights sold for closets and
stuff, except I want it motion sensored.

Or, is there already a device made that does this?
(Something with a solar cell charger, and rechargable batteries would be
even better, but the solar charger would need to be outside the
building).

The other idea is to buy a ready made circuit board and install it in my
own light..... Do they sell such a thing? I'd rather not have to build
the board if possible, but I'm open to options!

I have a flyer for one at $18
Here is another

http://www.harborfreight.com/catalogsearch/result?q=98085

Greg

 

[gregz]

I have a flyer for one at $18
Here is another

http://www.harborfreight.com/catalogsearch/result?q=98085

Greg

Got coupon in American legion magazine $17.99

Greg

 

[miso]

Anyone have a design for a motion sensor? Sure, I could just buy the
sensor for an outdoor motion sensor light, but I want a circuit to
control a *battery operated* LED light. The purpose is to illuminate
the inside of an outhouse (toilet) at a campground, and have it turn ON
when someone enters. There is no electricity in the building. I just
want something battery operated that wont be switched on by the campers
and left turned on to drain the batteries when they leave the outhouse.
It should illuminate when they enter, and turn off shortly after they
leave.

I'm thinking in terms of those stick on LED lights sold for closets and
stuff, except I want it motion sensored.

Or, is there already a device made that does this?
(Something with a solar cell charger, and rechargable batteries would be
even better, but the solar charger would need to be outside the
building).

The other idea is to buy a ready made circuit board and install it in my
own light..... Do they sell such a thing? I'd rather not have to build
the board if possible, but I'm open to options!

You would certainly want a PIR based sensor, but they require a
detection in the change of heat (i.e. person enters the can) and that
takes detection circuitry. [At one time switch cap, but today just
sample data system).

I'm more inclined to go for a high efficiency green LED and just run it
all night from a battery that is charged during the day. Look at those
cheap outdoor LED garden lights for inspiration. Green is where you eye
peaks, and for some reason it also is a wavelength that is efficient for
LEDs. [There are papers that go into the wavelength where your night
vision is most efficient, and this differs from where your eye peaks in
daylight.]

I've seen these lights with white LEDS for as cheap as $2. In the past,
I used to plop down these cheap lights on remote mountaintops on BLM
land. Eventually somebody would climb where I planted a light and remove
it. I guess the BLM thought I was destroying the night time scenery.
These are non-trivial climbs, so somebody must have really been POd to
go through such effort and remove the light.

If you roll one yourself, I assume you just trickle charge a NiMH with
the solar cell, and high side current sense when the solar cell is no
longer producing current, which is your clue to power the LEDs. Probably
an over-voltage detect on the NiMH, though if you size the solar cell
properly, I bet just trickling would be fine. I doubt these cheap
Chinese lights are very sophisticated.

While you are at it, an electric fan in the outhouse would be appreciated!

 

[mi]

Anyone have a design for a motion sensor? Sure, I could just buy the
sensor for an outdoor motion sensor light, but I want a circuit to
control a *battery operated* LED light. The purpose is to illuminate
the inside of an outhouse (toilet) at a campground, and have it turn ON
when someone enters. There is no electricity in the building. I just
want something battery operated that wont be switched on by the campers
and left turned on to drain the batteries when they leave the outhouse.
It should illuminate when they enter, and turn off shortly after they
leave.

Google or look from Amazon 'pir battery led'.

Or get a panasonic PIR sensor from Mouser and connect it with a LED.
To prevent LED from using the battery during day, add LDR.
The PIR sensors consume about 1uA, so they can run on battery for quite long time.