Yes. All of the below. Also a big variable speed electric hand drill
plugged into same power outlet or connected with clip leads to 115VAC
terminals of device being tested. Click on/off, fwd and rev.

And for UNcommon levels, a barbecue igniter. Connect one terminal to
ground plane of circuit board, let other terminal arc to ground
connection in a different place or even to the same connection a mm
or so away. If that doesn't reset your PIC even one time out of a
hundred, you've got a pretty robust design.

Another torture is to wire up a (e.g.) 5V relay as a buzzer and
connect it with clip leads to the 5V supply on the board to be
tested. (Assuming, of course, that there is enough margin in the
supply to drive the relay in addition to the circuit.) Manipulate it
into various orientations w/respect to the PIC, as some of the EMI is
conducted and some radiated.

Reg

>Do any of you have any standard torture tests that test your products
>against common levels of noise and spikes?  I am not interested in formal
>EMC testing at a lab, just something that can be homebrewed.   We have a
>machine we use that consists of a lamp dimmer with a 100 watt lamp, a
>couple of heavy duty contactors that clack each other on and off, and an
>electric mixer connected to one of the clacking relays going rrumm rrrumm
>rrumm.   It is an extremely crude machine, but pretty effective at making
>noise.  I am wondering if anyone else does this sort of testing.
>
>
>
>-- Lawrence Lile

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