how to physically read smt ic codes properly ?

Thread Starter


Joined Dec 27, 2011
do you use a microscope ?

i've been using a loupe with little success as they have a thin layer of green epoxy over them and even 1500 wet and dry doesn't seem to help much.

is there a way to tell from an incomplete part of the ic code. i've made out 3 1/2 of the 7 ic's so far.

2 IR2106's, 1 phillips 14 pin HEF40106BT another phillips 14 pin that is so hard to read I can only make out REF4883 but the R and 3 might not be correct.

then another 3 still undiscovered. making it tricky to decipher the circuit.

the offending circuit

another image of some of the ic's



Joined Nov 30, 2010
denatured alcohol = ethyl alcohol with a poison in it.
the phrase, "methylated spirits" suggests that the poison is methyl alcohol.


Joined Mar 31, 2012
I've always wondered how you "denature" something by using something else that is just as "natural" as the thing being "denatured" with it. :confused: :D