This project is an 8-channel strain gauge data acquisition system built around the Raspberry Pi Pico. It can also be used for any precision resistance measurement using a Wheatstone bridge.
This project is an 8-channel strain gauge data acquisition system built around the Raspberry Pi Pico. It can also be used for any precision resistance measurement using a Wheatstone bridge. It features a Texas Instruments 8-channel, 24-bit ADC with adjustable gain (1 to 128) and a sampling rate of up to 32 kSPS. The system provides up to 9V, 250mA shared excitation voltage for the channels, which can be adjusted by soldering resistors on the PCB. Future revisions plan to support 10V excitation, which will require a power supply of more than 5.5V.