# heat sensitive paper/film for finding short circuits?

D

#### Dan K

Jan 1, 1970
0
circuit board that has a short circuit and it will show you the hot spots.
I only saw it used a couple times, and that was quite a few years ago.

Thanks

Dan

M

#### [email protected]

Jan 1, 1970
0
Dan said:
circuit board that has a short circuit and it will show you the hot spots.
I only saw it used a couple times, and that was quite a few years ago.

Thanks

Dan

Interesting idea. I imagine cling film would distorrt where it got hot
and thus work.

NT

H

#### Homer J Simpson

Jan 1, 1970
0
circuit board that has a short circuit and it will show you the hot spots.
I only saw it used a couple times, and that was quite a few years ago.

There used to be wax crayons for various temperatures.

S

#### scrsan

Jan 1, 1970
0
Dan said:
circuit board that has a short circuit and it will show you the hot spots.
I only saw it used a couple times, and that was quite a few years ago.

Thanks

Dan

does the paper roll used in thermal printers or fax machine will work??

K

#### Kurt Krueger

Jan 1, 1970
0
Homer said:
There used to be wax crayons for various temperatures.
You can still get them, but they cost about $15 each. What about those IR thermometers? Some have a pretty small field of view and should work. If you can get close to the work, Harbor Freight has a$10 one (on sale) with a wide field of view (sees
1" when you're 1" away).

Y

#### Yukio YANO

Jan 1, 1970
0
Dan said:
circuit board that has a short circuit and it will show you the hot spots.
I only saw it used a couple times, and that was quite a few years ago.

Thanks

Dan
Stick board in Deep-freezer for a few minutes, so that it becomes cold
enough to frost over in a humid room, and then power up the board. The
high current areas will defrost first ! I am assuming that this is a
low impedance power board, and not bothered by leakage from the damp
circuit-board. the hard-frosted board will not leak until the frost
melts. By then you should have the information you need anyway.

Yukio YANO

M

#### Meat Plow

Jan 1, 1970
0
Stick board in Deep-freezer for a few minutes, so that it becomes cold
enough to frost over in a humid room, and then power up the board. The
high current areas will defrost first ! I am assuming that this is a low
impedance power board, and not bothered by leakage from the damp
circuit-board. the hard-frosted board will not leak until the frost melts.
By then you should have the information you need anyway.

Yukio YANO

Or you could spray the suspected area(s) with freeze mist aka component
cooler.

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