Oscope reading open circuit

[ArcticPhoenix0]

Newbie here with a simple circuit build. Trying to get an idea of how to use my scope so bear with me if this is clear and obvious.

4AA's
220o resistor
violet/blue LED
220uF cap (cap removed).

Just poking around with my oscope and can't figure out what I'm measuring here off the positive LED leg. The circuit is open; negative battery terminal is off the board and the cap is pulled. Still showing a reading on the scope and I can't explain why. Shouldn't it be showing a flat line?

[rstofer]

From the photo, it's not possible to determine V/div and time/div.  With all that antenna wire laying around, it is certainly possible to get a trace even though the voltage is likely to be quite low.  Try shorting out the probe or even removing the probe from the scope.  Then what happens?

[ArcticPhoenix0]

I'm thinking I'm picking up my house power. It's right at 60Mhz. 200mv and 20ms/Div.

This is what I get when everything's on and the probe is grounded to the negative battery terminal.

[xrunner]

Just poking around with my oscope and can't figure out what I'm measuring here off the positive LED leg. The circuit is open; negative battery terminal is off the board and the cap is pulled. Still showing a reading on the scope and I can't explain why. Shouldn't it be showing a flat line?

I grabbed your image and expanded it on my pc. Your display is indicating F=60.0 Hz. That's picking up line voltage noise. 

[StillTrying]

It's just the normal few volts of 60Hz noise that an open circuit input, = the scope's input picks up.

Don't you find that everything slides off with the desk like that.

60 MHz

[james_s]

Scope inputs are very sensitive, a wire, your finger, anything that acts like an antenna will pipe a signal into it. Without any sort of tuner (filter) the power line frequency will normally dominate what you see.

[ArcticPhoenix0]

M[/s]Hz

Idk man, I'm still trying to figure it out. I can replace stuff that's clearly burnt out or suck up solder that's bridging IC pins but that's about it atm.

[rstofer]

Idk man, I'm still trying to figure it out. I can replace stuff that's clearly burnt out or suck up solder that's bridging IC pins but that's about it atm.

This stuff takes time.  At least you have a first rate scope!

Put your finger on the tip of the scope probe and watch the trace go crazy at line frequency.