/diy/ - Do It Yourself

The circuit works no problem in the simulator, but after i tried it in real life it doesn't, strange.

The AC power source is an audio jack from my phone.

So basically, i connected the audio jack ground to arduino ground, and then the output coming from the diode is connected to an analog input pin on the arduino (represented by the 96k resistor in the screenshot).

The problem is that the moment i connect the wires to the arduino the audio sine wave goes completely flat (0 amplitude) and when i disconnect the wires to the arduino it goes back to normal (i am monitoring the circuit with my oscope)

any idea why?