Flying Monkey Cord Tester
                        Designed by M.Bombard
                  
                  


                
The wiring diagram for this project shows RCA jacks. You can use any
kind of jacks you like. I built a MULTI jack unit using 1/4 inch phono,
RCA and MIDI jacks all in the same box. I did this by hooking the jacks
in parallel. Just attach the jack together in a string. Positive to
positive, negative to negative. (see diagram)

All parts for this project can be purchased at RADIO SHACK. You'll need
a box, (2) 3volt LEDs with holders, a momentary switch (normally off), a
battery holder that holds two (2) "AA" bateries and jacks (what ever
kind you want). The whole thing should cost well under $10.00.

After a thorough testing session, I found it also analyzes the problem
for you.  So here is the list of problems it will tell you about.



If the cord is correctly wired, both light will be lit when both ends
of cord are inserted in jacks.

If the positive lead is disconnected, Only "neg" led will be lit.
Reversed if only negative lead is disconnected.

If the cord is shorted in some way (wires in contact with plug cover)
pluging "only one end" of the cord in the tester will result in one
light going on. This feature can also be used as a tracer device. If you
have a big bundle of long cords, and you have no idea what end goes to
what end, you can short out one end of the cord (by wrapping it with tin
foil). Then when you randomly start pluging in cords to one plug on the
tester from the bundle's other end, you'll have the right cord when the
led lights up. I use this to make sence out of my patch bay on rare
occations when I move things around.

If the wiring in the cord is crossed (pos to neg) no lights will go on
"until" you push the battery test button. Then both lights will go on.


That's pretty much it. Enjoy!

Mark Bombard 
M.BOMBARD