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Posts Tagged ‘accelerometer’

App note: Embedded orientation detection using the MMA8450Q

Sunday, October 23rd, 2016

NXP's accelerometer chip MMA8450Q, provides orientation detection on handheld devices. Link here (PDF) This application note targets the portrait/landscape orientation detection feature which has become standard in many hand-held electronic devices. Additionally, this application note aims to explain uses as well as highlight some of the challenges of designing an...

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Arduino Library for Freescale’s MMA7361 3 axis accelerometer

Friday, November 14th, 2014

Rohit Gupta wrote a basic library for using MMA7361 3axis Accelerometer with Arduino, that is available at Github: This library helps you to easily play with the almost universal 3 axis accelerometer available in most Hobby markets that is based on Freescale's MMA7361. In order to get in working you...

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Posted in Arduino, library | 1 Comment »

App note: Free-fall sensing for drop-force modeling using a Kionix MEMS tri-axis accelerometer

Sunday, September 21st, 2014

Here's another app note (PDF) from Kionix on their tri-axis accelerometer applications. An earlier set-up was used in the application note's experiment. This application note describes how to use a Kionix MEMS tri-axis accelerometer as a free-fall sensor for drop force modeling applications. Required theory, equations, and sample event signatures...

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App note: Interfacing the KXP94 or KXR94 tri-axis accelerometer with the Texas Instruments MSP430F149 microprocessor to measure tilt and other motions

Sunday, September 21st, 2014

Capture motions with Kionix' Tri-Axis Accelerometers and a TI's MSP430F149. App note here (PDF) Kionix linear accelerometers function on the principle of differential capacitance. Acceleration causes displacement of a silicon structure resulting in a change in capacitance. A signal-conditioning CMOS technology ASIC detects and transforms changes in capacitance into an...

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App note: Accelerometer Errors

Sunday, September 7th, 2014

Temperature dependence, Sensor bias, Ratiometric error due to supply voltage variation and etc. These are some of the errors made by accelerometers, here's an app note from Kionix to help you deal with it. Although everyone would like them to be, sensors are not perfect. Understanding the accelerometer’s errors is...

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App note: Warranty Protection Using a Kionix MEMS Tri- Axis Accelerometer

Sunday, September 7th, 2014

Shock and vibration detection as part of product warranty protection, these sensors can be part of any drop sensitive devices i.e. Hard disk drives to record shock instances for warranty claims. Here's an interesting app note (PDF) from Kionix. This application note describes how to use a Kionix MEMS tri-axis...

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OLED watch is alive!

Wednesday, July 9th, 2014

Jared Sanson posted an update on his OLED watch. He writes: Here's a few features of my firmware: USB HID Communication (No PC drivers required!) Watch face for telling the time (Kind of required...) Date & Upcoming events Accelerometer reading RTOS Kernel debug info And some features planned for the future:...

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DIY MMA7455L 3-axis accelerometer breakout

Friday, February 10th, 2012

Here is a DIY breakout board for the MMA7455L, an inexpensive three-axis accelerometer. It's got all the decoupling capacitors and pull-up resistors specified by the accelerometer datasheet.There's also an interfacing tutorial for the Arduino. We like this chip because it's cheap, but the LGA package is difficult to solder. If...

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Posted in Arduino, DIY | 4 Comments »

uPOV persistence of vision with an accelerometer

Thursday, April 28th, 2011

uPOV is a persistence of vision device with an accelerometer. This is the same concept we're trying for with the USB POV Toy. The problem I had with most of the current POV units is that they required skill to use effectively, timing your swings so that the message only...

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Posted in AVR, POV Toy | 1 Comment »

A guide for using IMU devices

Sunday, February 6th, 2011

Starlino has a great article on using gyroscopes and accelerometers. I'll try try to cover few basic but important topics in this article: - what does an accelerometer measure - what does a gyroscope (aka gyro) measure - how to convert analog-to-digital (ADC) readings that you get from these sensor...

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Posted in Chips, parts | No Comments »

Dice Puzzle Box

Sunday, January 23rd, 2011

Deddies Lab has a puzzle box project based on the an Atmega328, an accelerometer and a servo controlled locking system. The object is to get inside a dice-labeled box by tilting it in the correct sequence thereby entering the secret code. When the correct code has been detected by the...

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Posted in AVR, code | No Comments »

Explore I2C/SPI accelerometer (MMA7456L) with Bus Pirate

Tuesday, September 28th, 2010

Starlino demos the Freescale MMA7456L accelerometer with an I2C/SPI interface with the Bus Pirate. Get a Bus Pirate v3b for $30, including worldwide shipping at Seeed Studio. Adafruit also has the Bus Pirate and probe cables in stock and ready to ship.

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Bus Pirate: Wii Nunchuck quick guide

Wednesday, August 19th, 2009

See the latest version in the documentation wiki. Scorpia shared his experience interfacing a Wii Nunchuck with the Bus Pirate I2C library. He used Seeed Studio's breakout board that brings all the Nunchuck signals to an easy-to-tap header. Here's some alternatives to the breakout board. Bus Pirate Wii Nunchuck breakout...

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Posted in Bus Pirate | 3 Comments »

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