Hello
iam making a graduation project to detect a car crash , i use arduino uno with adxls45 sensor, any one know the working principle of this sensor to do that and how to use it to detect the crash ?
What defines a crash? Isn't that a rapid change in velocity? Isn't change in velocity acceleration? Isn't acceleration what an accelerometer measures?
Connect the accelerometer. Get it streaming data to the serial monitor. Bang the accelerometer, simulating a crash. What do you see happening to the data being streamed?
I want deeper answer than this answer
Thank you
I want deeper answer than this answer
You mean that you want someone to write the code, assemble the hardware, and make the presentation for you?
If there is something you don't understand, say what that is.
amarneh1:
I want deeper answer than this answer
Thank you
Wow.
Simply, wow.
New depths plumbed. 
PaulS:
You mean that you want someone to write the code, assemble the hardware, and make the presentation for you?If there is something you don't understand, say what that is.
No , i Didn't mean that . Only I want to understand the principle more explained, in detail and clear .
Velocity is moving a certain distance in a certain time. Acceleration is a change in velocity. A crash involves a sudden, large acceleration from some velocity to zero. The accelerometer will monitor the acceleration and when you see a large output - possibly all the way to the max - you are in a crash.
Groove:
Wow.
Simply, wow.New depths plumbed.
If you admire so much , take a selfi with it.
KeithRB:
Velocity is moving a certain distance in a certain time. Acceleration is a change in velocity. A crash involves a sudden, large acceleration from some velocity to zero. The accelerometer will monitor the acceleration and when you see a large output - possibly all the way to the max - you are in a crash.
Big Like , Thank You So much .
@amarneh1, did you even try to research this subject before posting your question?
Have you read this, (specifically item 4.):- How to use this forum - please read
Here is the Google search, with heaps of info on accelerometers:-
how does an accelerometer work
You can't expect serious, in-depth answers from people when it's very obvious that you've put no effort whatsoever into researching your subject before posting. (Why should anyone here bother when you won't?)
iam making a graduation project to detect a car crash
Make an effort!
Mark
holmes4:
Make an effort!Mark
I was going to suggest that OP hold the accelerometer while the car crashes. Such an ingrate.