Arduino Forum

Using Arduino => General Electronics => Topic started by: marcos86 on Apr 10, 2013, 02:43 pm

Title: Wheatstone bridge
Post by: marcos86 on Apr 10, 2013, 02:43 pm
I should realize a Wheatstone bridge with its amplifier to be connected to arduino for the thermoresistors
Some of you have any scheme or how to make it able to explain

Title: Re: Wheatstone bridge
Post by: Constantin on Apr 10, 2013, 04:48 pm
Review the sites of Analog Devices, Microchip, Linear Technologies for the ADCs they offer - these (16+ bit) ADCs typically include a drawing in the data sheet on how to use these chips with a Wheatstone bridge - especially when you're dealing with very high-resolution ADCs like the LTC2485, for example.

Theoretically, you could also use an op-amp with an Arduino to build a crude wheatstone bridge. However, I wouldn't simply because the resolution of the ADC inside the Arduino isn't that great (about 10 bits).