My favorite way to make lots of electical noise is to use a large motor 
contactor. The trick is to complete the circuit to the contactor with a 
loose wire and a file. Drag the loose wire across the file and the contactor 
will chatter like crazy - it's not very scientific, but it does make lots of 
EMI.


-- Mark

-----Original Message-----
From: <peiserma@ridgid.com>
To: <piclist@mit.edu>
Date: Wed, 31 Jan 2007 16:31:39 -0500
Subject: [EE] easiest way to create and couple noise into a circuit?

> Most circuits have some inputs and outputs (external wires) connecting
> them to the real world. I want to create electrical noise and subject
> an
> unsuspecting PIC and its inputs to noise. 
> 
> I'd love to have a gizmo that can throw some noise into the system in
> the lab. It doesn't need to be fancy, just an effective noise-maker.
> I'm
> thinking a bank of relays with long leads to the relay coils (no coil
> suppression of course). The leads could then be wrapped around the
> inputs to the circuit. I also have in my lab a sample 120V DC motor; I
> could run that directly from rectified 120V AC, and switch rapidly
> on-off with one of the aforementioned relays...
> 
> Does anyone have a favorite way of doing a quick bench test like this
> in
> their lab? Something you've maybe constructed that you'd like to share?
> 
> 
> -- 
> http://www.piclist.com PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist


-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist