An accelerometer is used with an accelerator. Accelerators are electromechanical machines used for the calculation of changes in the speed of acceleration triggered by movement over a period. When choosing an accelerometer, there are lots of factors to consider, whether you need it for detecting orientation and vibration or calculating the velocity of an object it is connected to.

Accelerometers have so many applications. In the aviation industry, sophisticated accelerometers are utilized as inertial navigation system elements. In an industrial environment, they are used for the detection and monitoring of vibration in machines that rotate. Also, the ones we recognize the most are integrated into our gadgets like digital cameras, tablets, computers, smartphones, and others. They ensure that screen images are seen in the correct position.

How To Choose the Suitable Accelerometer for Use

The challenging question is how to choose the right and appropriate accelerometer for use? Moving on, there are some questions to consider regarding your design necessities like:

     Single or multiple axes?
     Consider the level of swing needed
     Analog or digital?
     Have you confirmed the buffering and impedance?

The hardware you would be using should determine if you will need an analog or digital. Digital accelerometers make use of pulse width modulation. Therefore there is a square wave at a particular frequency while analogs have an output that is always voltage equivalent to the speed.

Furthermore, after this, the next question would be, what exactly are you using for the design? A microcontroller having digital inputs or a basic stamp would need a digital output accelerometer. Note that analog is recommended if you are making use of a full analog-based circuit.

Also, for over 80% designs, two axes are okay. Generally, 3D projects need a 3-axis accelerometer, or you could probably make use of 2-axis accelerometers positioned at the right angles.

At the activity of quantifying, incline utilizing the Earth's gravity, a ±1.5 g accelerometer is best for swing. ±2 g is recommended for the measurement of a robot or car motion. Accelerometers of about ±5 g and above are suitable for projects that involve you stopping and starting. The more sensitive the accelerometer is, the more accurate the reading will be. Note that sensitivity is the balance of change in speed, i.e., input, to change in the output wave. 

This alone explains the correct relationship between output and acceleration. Sensitivity is stipulated at a certain supply voltage, and it is naturally displayed in units of LSB/g or mg/LSB for digital-output and mV/g for analog-output accelerometers. 

It is also expressed in a range of max, typ, and min, or as a percent and figure deviation. Sensitivity is ratiometric in analog output sensors; therefore, when the supply is doubled, the sensitivity is automatically doubled too.

In conclusion, before you decide to place an order on the accelerometer that you want, make your research and know if it is exactly what you want to avoid wasting your hard-earned cash.