liudr:
I am interested if they make an open source lock-in amplifier with the two channel analog inputs. I made some progress in that direction using NI hardware and labview, then I graduated. I wish someone makes a lock-in amplifier app. An off-the-shelf amplifier device costs over $2K. I hope their ADC has enough gain (should be why not) to amplify millivolts.This is very interesting to my research side. Equipment has always been expensive.
I'm also interested in lock-in amplifier especially for Arduino microcontroller based. Could you share your work before using NI hardware and Labview. Currently I'm trying to miniaturize the function of commercial lock-in amplifier (NF LI-5640) in microfluidic application. However, no outstanding results come out.