[OT] measuring DC wall wart - test-drb@ccmp.vtda.org

9 Jun 2002

...
 heck you can even use a jar of salt water 
with 2 electrodes in it at a pinch -- electrolysis is a problem if you 
use it for any length of time on DC, but it will act as a power resistor 
for long enough to test a PSU) 
I did that for extra credit once in a theater lighting class. I built a 
Salt Water dimmer system. Worked real nice for a little while, then the 
water turned piss yellow, and it stopped conducting at all. But I got the 
extra points to make up for the classes I missed.

I built it using a 9 volt battery, the little square ones used in toys, a 
baby food jar, metal cut from a can of peaches, and some scrap wood, 
wires, and light bulb pulled from a toy truck... same truck the battery 
came from. It was a fun evening project.

-chris
<http://www.mythtech.net>