SparkFun will be closed Nov 26th and 27th for the Thanksgiving holiday. Orders placed after 2:00pm MT on the 25th will ship out Monday the 30th.

Member #398089

Member Since: January 14, 2013

Country: United States

  • I’m trying to amplify the voltage of a thermocouple (about 3mV range) and feed it into an Arduino analog input. The gain is not ideal but at least it’s a starting point. However, just like the rest of you, no matter what I do, the output of this opamp pretty much stays at 2.5V, which reads around 542 on the Ardunio. At 3mV x100, the output should not be anywhere near 2.5V, more like 300mV.

    I’ve put a pot on the Arduino input and it does range between 0-1023, so it’s not the Ardunio or the code. So, this product is not ideal for these types of applications.

No public wish lists :(