Search found 4 matches

by diphthong
27 Feb 2011, 10:00
Forum: Mindstorms Hardware
Topic: Problem with I2C accelerometer BMA020
Replies: 7
Views: 8982

Re: Problem with I2C accelerometer BMA020

Do you think I should open the NXT and unsolder the resistors? I do not really want so much. Is not there another way?
Thanks and
Greetings
diphthong
by diphthong
24 Feb 2011, 20:43
Forum: Mindstorms Hardware
Topic: Problem with I2C accelerometer BMA020
Replies: 7
Views: 8982

Re: Problem with I2C accelerometer BMA020

The BMA020 even tolerate only 3.6 V, but it's a linear controller installed (see diagram):
http://teamohnename.bplaced.net/pictures/SP_3DBS.JPG
So the board 2.5V to 6V tolerate.
by diphthong
24 Feb 2011, 19:17
Forum: Mindstorms Hardware
Topic: Problem with I2C accelerometer BMA020
Replies: 7
Views: 8982

Re: Problem with I2C accelerometer BMA020

Hello, the board is connected as follows: Board: GND - GND NXT SDO - GND SDI - SDA NXT, 82K Pullup (blue) SCK - SCL NXT, 82K Pullup (yellow) CSB - Vdd (ca. +5V) (green) GND - GND INT - 470R resistor, LED (The LED lights continuously) UPullup - nowhere Enable - nowhere UIN - Vdd If the program is not...
by diphthong
23 Feb 2011, 21:11
Forum: Mindstorms Hardware
Topic: Problem with I2C accelerometer BMA020
Replies: 7
Views: 8982

Problem with I2C accelerometer BMA020

Hello, I bought recently an I2C accelerometer. This involves the BMA020 that is built on a board with level converters and various other components, but no other processors. The problem is that I get the part not running. I do not know if the circuit is constructed correctly. Here is the datasheet o...