How to use ADXL345 accelerometer?

Development Boards MicroMod
1

Hello, I am using an STK500 with a mega644 and want to use the adxl345+breakout board that I have just sampled for free from analog devices. Since I’m a noob, I’m not too sure how to hook up everything being that the adxl345 uses 3.3V as supply, not 5V. Any schematic examples or circuit design tips? I was thinking of using a 3.3V zener on all of the inputs/outputs, but this seems inefficient. Any ideas?

Thanks

2

Also, how do I use this while freeing up the usart pins?

3

wordsmith1099:
Hello, I am using an STK500 with a mega644 and want to use the adxl345+breakout board that I have just sampled for free from analog devices. Since I’m a noob, I’m not too sure how to hook up everything being that the adxl345 uses 3.3V as supply, not 5V. Any schematic examples or circuit design tips? I was thinking of using a 3.3V zener on all of the inputs/outputs, but this seems inefficient. Any ideas?

Thanks

Hi,

you refer to “3.3V as supply”, then refer to “all of the inputs/outputs” also.

Have a look at the data sheet, and see if the digital imputs are TTL.

Also, look at the unit’s power requirement. Some Arduinos have a 3.3V output, but you’d be better off using a 3.3V regulator to supply the unit.