scope How can I inspect AC mains signal on my +/-5v scope? - FireBoard - Randr Firearms

Latest News

scope How can I inspect AC mains signal on my +/-5v scope?
I need to find a way to couple the AC mains signal to my low voltage scope input. I'm adjusting a rotary spark gap and need to get the bangs on the up and downswing of the AC cycle. Is there something I can build with a transformer / optoisolator - or is it easier than that? Dave

Report to moderator Logged

Logged

The administrator has disabled public write access.

#6607

Tom Biasi (Visitor)

scope How can I inspect AC mains signal on my +/-5v scope?

I need to find a way to couple the AC mains signal to my low voltage scope input. I'm adjusting a rotary spark gap and need to get the bangs on the up and downswing of the AC cycle. Is there something I can build with a transformer / optoisolator - or is it easier than that? Dave Hi Dave, I'm not quite sure what you are doing. You can couple AC to your scope by connecting a coil to the input and moving it close to the AC signal. Tom

Report to moderator Logged

Logged

The administrator has disabled public write access.

#6608

John Larkin (Visitor)

scope How can I inspect AC mains signal on my +/-5v scope?

I need to find a way to couple the AC mains signal to my low voltage scope input. I'm adjusting a rotary spark gap and need to get the bangs on the up and downswing of the AC cycle. Is there something I can build with a transformer / optoisolator - or is it easier than that? Dave An AC wall-wart transformer will work, and is safe. It will introduce just a little phase shift. Add a resistive voltage divider or a pot if the peak voltage is too high for your scope. John

Report to moderator Logged

Logged

The administrator has disabled public write access.

#6609

Jamie (Visitor)

scope How can I inspect AC mains signal on my +/-5v scope?
I need to find a way to couple the AC mains signal to my low voltage scope input. I'm adjusting a rotary spark gap and need to get the bangs on the up and downswing of the AC cycle. Is there something I can build with a transformer / optoisolator - or is it easier than that? Dave They call it a 100:1 or 1000:1 scope probe for HV work. http://webpages.charter.net/jamie_5

Report to moderator Logged

Logged

The administrator has disabled public write access.

#6610

Michael Black (Visitor)

scope How can I inspect AC mains signal on my +/-5v scope?

I need to find a way to couple the AC mains signal to my low voltage scope input. I'm adjusting a rotary spark gap and need to get the bangs on the up and downswing of the AC cycle. Is there something I can build with a transformer / optoisolator - or is it easier than that? Dave They call it a 100:1 or 1000:1 scope probe for HV work. HV Probes are for actual High Voltage. His problem isn't high voltage, but trying to connect the scope input across the AC line. The little problem of grounding one side of the line with the ground lead is one issue here. He needs isolation. Michael

Report to moderator Logged

Logged

The administrator has disabled public write access.

#6611

Phil Allison (Visitor)