We've recently had great success using a 10kV neon sign transformer, and
two pieces of wire in a "Jacobs Ladder" configuration. We ran an
insulated wire from the base of one of the HV wires, and coiled it above
the unit under test. Each time the Jacobs Ladder arced, a nice noise
pulse was generated. These noise pulses would often hang our system.
This set up allowed us to evaluate various different methods of
recovering from noise related hang-ups.

The obvious caveats apply when working with any HV
systems!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ian Rozowsky
R&D Director
Centurion Systems (Pty) Ltd.
Box 506 Cramerview 2060 Gauteng South Africa
+27-11-699-2434
http://www.centsys.co.za
 
Cerno et Prodo!
 
 

-----Original Message-----
From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf
Of John Chung
Sent: 01 February 2007 07:48
To: Microcontroller discussion list - Public.
Subject: Re: [EE] easiest way to create and couple noise into a circuit?

Just apply AC and DC together......... It really
depends on the noise range that you want to generate.

John


--- peiserma@ridgid.com wrote:

> 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
> 



 
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