Best way to toast TTL

[Grant Stockly]

Before I write to the group, Kurt Klemm, if you read this please try 
sending me a message on my web forum at http://www.stockly.com  I am 
getting your e-mails but based on them it sounds like you are not 
getting mine!  : (

---  Now to the rest:

I'm wishing I've kept all the broken TTL chips over the years...

I am evaluating a TOP2004 programmer for testing TTL chips.  I bought 
it off of ebay from 
http://www.mcumall.com/comersus/store/comersus_dynamicIndex.asp  I 
bought it on ebay because the price was cheaper.  They are located in 
Canada and it took 5 days to get shipped to Alaska.  Very well 
packed.  The other TOP programmers ship from china/japan.

I want to be able to recommend a TTL tester to my customers of the 
Kenbak kit.  With 132 74xx TTL chips it would really come in handy!

So far I think it does a good job.  If I lift a signal leg on a 
74LS04 it both can't auto detect anything and will report a 7404 as 
bad.  I only have one known bad part, a 74LS376.  It DID report it as 
bad and undetectable.

What I'm wondering is if anyone knows how I can prematurely kill a 
TTL device or simulate static failure.  I'd like to try to test how 
thoroughly the programmer tests the chips.  It can't tell the 
difference between a 7410 and 7412, but that isn't too important for 
knowing the chip works (mostly)

On a second note, I have successfully over clocked my Kenbak 
500%.  Its running happily at 5MHz.  : )  Although it gets a lot 
hotter!  I need heat sinks...

--I suppose giving one 12v to simulate hooking up a power supply wrong?
--Hooking 12v to a device normally powered at 5v?
--Shorting out a buffer output?  (I think some buffers are designed 
to be shorted out though)
--Vehicle ignition coil to an input?  : D

Grant