# AccelR8: a device for measuring acceleration

This is a fun project. Unfortunately, it takes some time to develop the code, so this is a work in progress and here i’ll just present the project so far.

Basically the AccelR8 is a device for measuring acceleration. It can measure +/- 2 g.
As it contains a microprocessor, it an also measure time.

This opens up some interesting possibilities. If we have the acceleration and the time, we can find speed (V), as V = a * t.

Also, we can find distance (D) as D = 0.5 * a * t * t.

If we now the mass of the object we are moving, we can also find the force (F) applied, as F = m * a.

And finally, from this we can find the power (P) from P = F * V.

So, after this Physics 101 refresher, what does all this mean ?

It means that you can just enter the weight of your car into the AccelR8, find a straight and level piece of road, go Bleifuss on the accelerator, and AcceR8 will tell you :

Acceleration 0-100 km/t (0-60 mph),
Braking distance 100-0 (60-0), and
Maximum Horsepower,

as well as a number of other interesting things. If you’re not careful enough, a cop may tell you a number of unrelated uninteresting things !

The operation and mode is controlled by a single pushbutton on the front. Calibration and value settings are made by simply tilting the device and using earth-gravity to scroll the values.

The AcceR8 in it’s cage.