Home     Contact     Projects     Experiments     Circuits     Theory     BLOG     PIC Tutorials     Time for Science     RSS     Terms of services     Privacy policy  
 Home      Projects     Experiments     Circuits     Theory     BLOG     PIC Tutorials     Time for Science   

<< Back to INDEX

Do NOT Blow your Oscilloscope - Common Pitfalls [Tips]
posted November 13 2014 15:42.27 by Giorgos Lazaridis

Well, its a common pitfall that most (if not all) amateur enthusiasts fall into when they take their first steps with an oscilloscope. People ask me "what should be my first oscilloscope" and i reply "the cheapest non-PC based bench-top oscilloscope you can find". Why is that? Its like the first car: It will get ruined, badly misused, maybe burned to ashes on the stake.

So here is a very common pitfall. The probe has a ground pin usually comes out as an alligator clip. Weird as it sounds, unless if you have an insulated probe, this alligator clip is directly connected internally to the mains ground. So, if you test a circuit with a non-insulated mains power supply and you connect the crock to the wrong circuit portion (anything close to L), BAM! Current will rush through the probe, through your expensive oscilloscope down to earth.

Side note: This can well happen with your USB programmer. I've burned one along with a couple of USB ports on my PC. The ground plane of the PC is also connected to the mains earth. So, i was testing my uninsulated PIC dimmer when i decided to connect the PICKit on the circuit but i forgot to remove the power...

Here is a video with more detailed info.


You might also like...

How Bird Wings Work [Video]

This 2.5Kg magnet breaks its own free fall [Physics]

Demystifying Algorithms for all (literally) [Mind hack]

How boomerangs work [Physics]

TED-Ex talks about the lever

8 Things that your Teacher Taught you Wrong! [Knowledge]

A-rhythm-etic. The math behind the beats [Education]

Microchip Teaches Switched Mode Power Supplies [Webminar]

<< Back to INDEX



  Email (shall not be published)


Notify me of new posts via email

Write your comments below:
BEFORE you post a comment:You are welcome to comment for corrections and suggestions on this page. But if you have questions please use the forum instead to post it. Thank you.


No comment yet...

Be the first to comment on this page!

 Contact     Forum     Projects     Experiments     Circuits     Theory     BLOG     PIC Tutorials     Time for Science     RSS   

Site design: Giorgos Lazaridis
© Copyright 2008
Please read the Terms of services and the Privacy policy