INA219 Bus Voltage

Breakout boards, sensors, other Adafruit kits, etc.

Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.
Locked
major_mayhem
 
Posts: 16
Joined: Mon Mar 05, 2012 11:40 pm

INA219 Bus Voltage

Post by major_mayhem »

I recently purchased an INA219 Breakout board.
Soldered on power & gnd wires + SDA & SCL.
Plugged it into my Uno R3 following pictures in the tutorial. Downloaded the library and ran the example sketch.
Nothing hooked up to either set of measuring terminals yet

Bus Voltage: 1.00V Where is that coming from?

User avatar
adafruit_support_mike
 
Posts: 67446
Joined: Thu Feb 11, 2010 2:51 pm

Re: INA219 Bus Voltage

Post by adafruit_support_mike »

That's probably either stray voltage on the inputs of the current sensor, or a high-impedance internal default voltage.

Generally speaking, you can't assume anything about the value of a pin that isn't connected to anything. It can have just about any voltage. Try shorting the two sense terminals together, or better yet, connect them both to GND.

Locked
Please be positive and constructive with your questions and comments.

Return to “Other Products from Adafruit”