Buzz

Hi @attila. Here is a description of my setup: AD2 is powered by USB connection to computer only 1+ is connected to output of the ramp wave. 1- is connected to a "virtual ground" of around 4.5V which I am using in the op-amp circuit since I don't have a power supply with positive and negative rails. I was able to solve the problem by connecting one of the black "ground" wires of the AD2 to the "true" ground of the 9V power supply. Thanks for responding to my post!

Hello, I just got an Analog Discovery 2 and was testing out the Oscilloscope function using a ramp wave oscillator I have built on a breadboard. I can get the ramp wave to show up perfectly as long as I am at 1V per division or higher. Whenever I go below 1V per division, I am seeing voltage spikes . I've attached screenshots here showing the ramp wave when using 1V per division and then again at 500mV per division with and without enough offset to see the top of the spikes. Any ideas what could be causing this? Thanks!