We used to take the flash out of disposable cameras, let the cap charge and
leave the interesting looking mechanism laying around on a bench in the lab
near the door.  Soon enough some unlucky, curious victim would enter, see
the device, and pick it up. Every time a bright flash and a yelp of pain as
the cap discharged.  This was all good until the Prof entered...poor old
guy.  Glad his heart didn't stop...if he had one that is.

-----Original Message-----
From: Ingemar Hernefjord (KC/EMW)
[mailto:[log in to unmask]]
Sent: Thursday, June 02, 2005 11:56 PM
To: [log in to unmask]
Subject: [TN] NTC: electronic jokes


The younger mates are so serious and selfcontrolled today. We used to have
more fun on the job when young. Like this one.
We used a 30 kV DC supply with 100 meg in series, put finger on, and charged
ourselves to plus 30,000 V. You needed thick rubber shoes of course. Walked
out to coffee machine or else, met comrade, pointed at his nose and said
'you got something there' and touched his nose. The result was a audiable
flash, a shriek, and then you had to defend yourself when the victim
hammered on you. We modified the game. Connected the supply to the steal
frame of the lab benches. When the chosen object sat down and rolled his
chair near the bench, you heard the scream through walls. Next modification
could stopped with a disaster. We connected 30,000 Volts to the door
handle,and amused every time a selected poor guy jumped high by the
flashover. However, one day, we forgot to remove the croc connector from
handle, there was a knocking, the handle went down and a bounce on outside.
And silence. Someone opened the door, and on outside was a shaky, stammering
old postman, retired but doing some extra job as elder. We got frightened
and asked him what happened. He looked angrily on us, picked up the post
from the floor and said "Nothing. Nothing at all" and left. The supply was
never used that way any more.

Used battery gun. We found a whole bunch of used handtorch batteries and 10
feet long plastic tubes and other stuff, left by electricians after house
repair. One guy looked thoughtfully on the stuff, took a battery, put it
into the end of a plastic tube, went to an open window, grasped a
pressurised air pistol and pressed it into the plastic tube, elevated the
tube and pressed the "trigger" and off went the battery and landed some 50
meters away. We improved the version, threedoubled the pressure and the
whole thing ended in a game to see who could get most batteries into a steel
container 100 meters away.

When television was not allowed on the job. Winter olympic game time and
work without knowing what happened. Unacceptable! A guy opened his Tektronix
oscilloscope, worked hard on overtime, and after couple of days he was
ready. All engineers were gathered in their white coats around the test
equipments. The boss appeared wondering why so many guys,  looked over
shoulders and saw green sweeps on a  number of CRTs. "Good, they are working
hard on the new TWT", he said to the next boss and they left, and closed
door. With some simple switch maneuvres on the oscilloscopes, the athletics
from the olympic games appeared on the little CRT. Green, everything green,
but what...no worries..we could at least see and listen. As soon as a
higher-in-rank appeared, someone whistled and..alas..a concentrated group of
engineers working hard...

Soldering iron shooting game. We put a number of 150 Watt soldering irons in
vices. Removed copper tip and filled the cavity with the tips from ordinary
matches and pressed the copper back into the iron. All electric connectors
were plugged into a multipanel with a common switch. All went out, last guy
triggered the switch, and we waited. After some minutes something like a
machinegun was heard, we opened the door and inspected the wooden wall to
see who's copper tip had penetrated deepest into the wood panel.

Nuts? Idiotic?...yes...but we had fun.

Ingemar Hernefjord
Ericsson Microwave Systems

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