Movement detector
- Thread starter dorkygrin
- Start date
@dg
Please can you provide a few more details about your requirements.
In the meantime,
here's a couple of sources to start with:
http://www.dimensionengineering.com/DE-ACCM2G2.htm
http://www.sparkfun.com/commerce/advanced_search_result.php?keywords=accelerometer&search_section=products
e
Please can you provide a few more details about your requirements.
In the meantime,
here's a couple of sources to start with:
http://www.dimensionengineering.com/DE-ACCM2G2.htm
http://www.sparkfun.com/commerce/advanced_search_result.php?keywords=accelerometer&search_section=products
e
Requirements:
1. Low current draw
2. Run from a 5volt supply. Probably four 1.2v NIMH AA batteries.
3. Turn on a 5volt (was 12volt, that was incorrect) circuit and keep it on as long as motion is sensed.
4. Shut down circuit after 5 minutes of no-motion.
5. Small enough to fit in an altoids box, but large enough to solder!
Seems so simple when I type it out but we all know how that goes!
1. Low current draw
2. Run from a 5volt supply. Probably four 1.2v NIMH AA batteries.
3. Turn on a 5volt (was 12volt, that was incorrect) circuit and keep it on as long as motion is sensed.
4. Shut down circuit after 5 minutes of no-motion.
5. Small enough to fit in an altoids box, but large enough to solder!
Seems so simple when I type it out but we all know how that goes!
ADXL345 accelerometer breakout from SparkFun
A cool breakout board from SparkFun that I have bought and I am going to use an 18X to read the data. I Will create a new thread with the details of just how to make it work.
http://www.sparkfun.com/commerce/product_info.php?products_id=9156
A cool breakout board from SparkFun that I have bought and I am going to use an 18X to read the data. I Will create a new thread with the details of just how to make it work.
http://www.sparkfun.com/commerce/product_info.php?products_id=9156
@Dorkygrin
1. As long as the 4 x AA batteries are
outside, then the circuit could
easily fit inside an Altoids tin.
Just for scale, I've shown:
AXE021 08M board
DimensionEng. 3 Axis accelerometer
Piezo sounder
LED/resistor
2. A working circuit, for the Dimension module, =
Three connections to Readadc pins.
“Alarm” outputs.
3.All current Picaxes could do the basic task.
What, exactly, do you require for the
Alarm / Output ?
e
1. As long as the 4 x AA batteries are
outside, then the circuit could
easily fit inside an Altoids tin.
Just for scale, I've shown:
AXE021 08M board
DimensionEng. 3 Axis accelerometer
Piezo sounder
LED/resistor
2. A working circuit, for the Dimension module, =
Three connections to Readadc pins.
“Alarm” outputs.
3.All current Picaxes could do the basic task.
What, exactly, do you require for the
Alarm / Output ?
e
Attachments
The only thing the output needs to do is switch on that 5 volt supply.
I guess I can let the "secret" out as I'm sure I cannot get a patent on it...
This circuit and power supply will simply activate a USB powered GPS that has logging capability. Here's a link to the GPS:
http://www.amazon.com/gp/product/B001GG06DI
When that GPS has power applied to it, it gets a GPS fix and starts logging.
The idea is that I package that all together, put in a waterproof box (guess the Altoids box wouldn't work then), put a strong magnet on it and use it as a tracking device. All self-contained, no external power source needed. You could then put it on some metal object (a car, one of your delivery trucks, etc.) and retrieve it some time later (days, weeks?) and find out where it's been. You could even build it out with more goodies and have it transmit ham radio signals when there is movement.
Of course, there are factors to consider:
1. Battery life (hence the power saving Picaxe/motion sensor circuit)
2. Orientation to the sky so it can get a GPS fix
3. Protecting from the elements.
So, that's where I'm at. Looks like that sparkfun project might work nicely.
I guess I can let the "secret" out as I'm sure I cannot get a patent on it...
This circuit and power supply will simply activate a USB powered GPS that has logging capability. Here's a link to the GPS:
http://www.amazon.com/gp/product/B001GG06DI
When that GPS has power applied to it, it gets a GPS fix and starts logging.
The idea is that I package that all together, put in a waterproof box (guess the Altoids box wouldn't work then), put a strong magnet on it and use it as a tracking device. All self-contained, no external power source needed. You could then put it on some metal object (a car, one of your delivery trucks, etc.) and retrieve it some time later (days, weeks?) and find out where it's been. You could even build it out with more goodies and have it transmit ham radio signals when there is movement.
Of course, there are factors to consider:
1. Battery life (hence the power saving Picaxe/motion sensor circuit)
2. Orientation to the sky so it can get a GPS fix
3. Protecting from the elements.
So, that's where I'm at. Looks like that sparkfun project might work nicely.
slimplynth
Senior Member
Clandestine and/or ethical?
Is it (il)legal to do that?
Is it (il)legal to do that?
Last edited:
You can do almost anything you want with a vehicle you own (personal or business).
There's a strong market among the parents of young drivers for GPS location + speed dataloggers - plug the unit into your PC and get a map of where they've been, when they arrived and left, and how fast they got there and back.
Someone else's vehicle probably needs a search warrant...
John
As Papaof2 has mentioned, there are plenty of options already for that.
If you need to track your teenagers, then give them a GPS-cellphone, and monitor that. There are service providers out there for that sort of thing.
As an anti-theft device for your own use, there is nothing illegal, in most countries, about having such a device. About sticking it on/in some-one else's vehicle, doubt that would be legal.
If you need to track your teenagers, then give them a GPS-cellphone, and monitor that. There are service providers out there for that sort of thing.
As an anti-theft device for your own use, there is nothing illegal, in most countries, about having such a device. About sticking it on/in some-one else's vehicle, doubt that would be legal.
Look what I just found!
http://www.spygadgets.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=SUPTRACK&Category_Code=3
I wonder how their "motion detector" works?
http://www.spygadgets.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=SUPTRACK&Category_Code=3
I wonder how their "motion detector" works?