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votes
1answer
101 views

acceleration sensor gives wrong values

I try to measure distances with the 3 axis accelerometer that is part of the lsm9ds1. therefore i measure the acceleration in x-axis and y-axis every 5ms and double integrate it over the time. I can ...
0
votes
1answer
106 views

Convert low voltage accelerometer to Wake ATTiny Open Source Binary Watch, activate on wrist motion

I'm working on building a binary watch similar to njeer's binary watch featured on hackaday I am planning on using a cr2032 3.0V 190mAh battery. So in order for this to run for any length of time I'...
2
votes
1answer
6k views

MPU6050 DMP values read

I am using MPU6050 breakout board IMU along with ATtiny2313 microcontroller to get the accelerometer and gyroscope values from the IMU. Here's the question : I want to know what values are computer ...
1
vote
4answers
292 views

Using change in magnitude of accelerometer to calculate speed?

I have a wheel (say 60cm in diameter). And I am planning to attach a small board with an AVR and an accelerometer about 10-20cm from the centre. As the wheel spins, I will get acceleration outwards. ...
1
vote
1answer
1k views

Problem in reading accelerometer axis (ATMEGA328P + ADXL345)

I really need help with my project. I'm trying to connect ADXL345 with ATMEGA328P through SPI interface to send received data from Atmega328P to PC via UART interface. The ATMEGA328P is sending the ...
0
votes
1answer
1k views

I2C protocol debugging using oscilloscope

We are testing an I2C accelerometer connected to the ATMega32A micro-controller. The accelerometer was working fine. We can write and read the registers using I2C protocol. When connected to the ...
1
vote
2answers
2k views

MEMS Gyroscope BMI055 - random high spikes in data

I am using the BMI055 on my AVR through I2C. Datasheet: http://ae-bst.resource.bosch.com/media/products/dokumente/bmi055/BST-BMI055-DS000-06.pdf I set it to filtered output at an ODR of 1000Hz and ...
3
votes
3answers
4k views

How to detect angular position of a device mounted on a rotating wheel?

Is there a sensor that can sense whenever rotating wheel pass the ground? Like when mounted on a bicycle wheel rims, but without anything mounted on a bicycle frame - only mounting on a wheel it self ...