Hello everyone,
I'm trying to use this board as an analog lock-in amplifier; however, I'm running into some difficulties due to a lack of any documentation on the use of this device in lock-in experiments, save for PhysicsOpenLab blog post that performs the experiment I'm trying to replicate. I've tried contacting numerous sellers on eBay for a device manual, including the seller I got the board from, but have yet to receive any documentation besides the manual for the AD630 chip itself.
The experiment:
Circuit: 1k resistor and 1-ohm resistor in series. The input signal is a 1Vpk, 1kHz square wave. I want to obtain the voltage signal across the 1-ohm resistor using the AD630 board. When I measure across the 1-ohm resistor directly with my oscilloscope, I do not get a very clear reading, as expected. The goal is to send the signal to the board and connect the output of the board to the oscilloscope. But I also get no reading this way.
I'm powering the AD630 board using a 9V battery connected to the board with 9V battery connectors. I know the board is on because a sequence of red LEDs turns on when I connect the battery. I connect the input signal (V across 1-ohm) and reference signal (square wave input) to the board and still fail to get an output. The board comes pre-configured in phase-lock mode and supposedly has a gain of 10, so I should surely be seeing something resembling a square wave, I'm only looking for millivolt sensitivity here.
Has anyone used this module in a similar experiment before?
I'm trying to use this board as an analog lock-in amplifier; however, I'm running into some difficulties due to a lack of any documentation on the use of this device in lock-in experiments, save for PhysicsOpenLab blog post that performs the experiment I'm trying to replicate. I've tried contacting numerous sellers on eBay for a device manual, including the seller I got the board from, but have yet to receive any documentation besides the manual for the AD630 chip itself.
The experiment:
Circuit: 1k resistor and 1-ohm resistor in series. The input signal is a 1Vpk, 1kHz square wave. I want to obtain the voltage signal across the 1-ohm resistor using the AD630 board. When I measure across the 1-ohm resistor directly with my oscilloscope, I do not get a very clear reading, as expected. The goal is to send the signal to the board and connect the output of the board to the oscilloscope. But I also get no reading this way.
I'm powering the AD630 board using a 9V battery connected to the board with 9V battery connectors. I know the board is on because a sequence of red LEDs turns on when I connect the battery. I connect the input signal (V across 1-ohm) and reference signal (square wave input) to the board and still fail to get an output. The board comes pre-configured in phase-lock mode and supposedly has a gain of 10, so I should surely be seeing something resembling a square wave, I'm only looking for millivolt sensitivity here.
Has anyone used this module in a similar experiment before?