Go Down

Topic: Troubles with BMP085 pressure sensor & I2C protocol (Read 3 times) previous topic - next topic

lucareds7

Quote
Can't tell you if you've damaged anything yet but if you did it would typically be the lower voltage devices.


I think so, but now even DS1307 RTC refuse to work... its behaviour is the same of the BMP085, while its supply voltage is 5 V

wayneft

I2C GPS Shield

Checkout my Open Source GPS Tracker on Kickstarter

lucareds7


lucareds7

#18
Jul 04, 2011, 12:43 pm Last Edit: Jul 04, 2011, 12:46 pm by lucareds7 Reason: 1
Last night, in spite of sleeping, I was thinking about 3.3 level conversion of signal. Should something like the attachment works (apart the mistake that the central resistor should be 220R in spite of 330R)? I even thought that it should work fine for digital output, but dunno know if it's the same for I2C... even thought that a diode should be mounted in parallel to resistor to avoid an extra lowering of 3.3v signal sended from sensor to I2C pins A4 & A5.

I bought a logical level converter, but if the method I thought about works it would be easier for me to integrate it into my own shields...

I'm sorry I tried to read something about I2C protocol but I understand almost nothing when applying it to Arduino.

Go Up
 

Quick Reply

With Quick-Reply you can write a post when viewing a topic without loading a new page. You can still use bulletin board code and smileys as you would in a normal post.

Warning: this topic has not been posted in for at least 120 days.
Unless you're sure you want to reply, please consider starting a new topic.

Note: this post will not display until it's been approved by a moderator.
Name:
Email:

shortcuts: alt+s submit/post or alt+p preview