Sonsivri
 
*
Welcome, Guest. Please login or register.
Did you miss your activation email?
March 28, 2024, 09:35:59 21:35


Login with username, password and session length


Pages: 1 [2]  All
Print
Author Topic: Human presence sensor?  (Read 6647 times)
0 Members and 1 Guest are viewing this topic.
rtm
Junior Member
**
Offline Offline

Posts: 53

Thank You
-Given: 90
-Receive: 71


a.k.a. klug


« Reply #25 on: December 26, 2015, 10:33:56 22:33 »

Recall it from your memory.. when you are sitting in a motionless car, even if you are sitting with closed eyes, you surely can say when somebody come in (or go out) to the car - you feel it with changing center of the weight of all car.

Use L3GD20 ST MEMS motion sensor, it is 3-axis digital output gyroscope 3D sensor - the price is 2$.
&
LSM303DLHC, ST MEMS system-in-package featuring a 3D digital linear acceleration sensor and a 3D digital magnetic sensor - the price is near 2$ too.

You can see changing of car weight balance and starting/stopping of the car by using of these two sensors together. Also you can always read information about doors opening (and safety belt state) from CAN bus of the car.

So, the 4$ budget for the sensors and you can easily install it at any place of the car. Quod erat demonstrandum.
Logged
Ichan
Hero Member
*****
Offline Offline

Posts: 833

Thank You
-Given: 312
-Receive: 392



WWW
« Reply #26 on: December 27, 2015, 05:59:24 05:59 »

Tire pressure change when standing still....you should see an LSB flip with a 6 bit converter, as an example

Nice, event i think this one will be difficult to fulfill the budget requirement as it will need a wireless transmission, still it is interesting - which sensor do you have in mind?

Use L3GD20 ST MEMS motion sensor, it is 3-axis digital output gyroscope 3D sensor - the price is 2$.
&
LSM303DLHC, ST MEMS system-in-package featuring a 3D digital linear acceleration sensor and a 3D digital magnetic sensor - the price is near 2$ too.

Another nice idea, will gyroscope has enough sensitivity for this? I have MPU-9250 somewhere in here - may try it.

I still have several months for this, any other tough please speak Smiley

-ichan
Logged

There is Gray, not only Black or White.
Pages: 1 [2]  All
Print
Jump to:  


DISCLAIMER
WE DONT HOST ANY ILLEGAL FILES ON THE SERVER
USE CONTACT US TO REPORT ILLEGAL FILES
ADMINISTRATORS CANNOT BE HELD RESPONSIBLE FOR USERS POSTS AND LINKS

... Copyright © 2003-2999 Sonsivri.to ...
Powered by SMF 1.1.18 | SMF © 2006-2009, Simple Machines LLC | HarzeM Dilber MC