I like that one Shafri, it kinda has the feel of a 1950s fantasy / space / atomic / horror film about it. It could almost be from a book called "Mysterious Adventures in Electricity!" or something. Clear and concise too.
@EEVBlog & Zad: thanx. while playing around with the -ve feedback op-amp, i got surprised that accidentally it match the positioning. ie Vi comes from the probes, the -ve comes from the blog, and the resultant Vo is the Dave himself! so its kinda like:
DMM (test equipment) + blog = Dave

but maybe the Dave's figure is not the best there, maybe should be another (more cheerful but pro looking etc) face impression.
and the font as well, i cannot find the font that i really satisfy in my pc/library/stock.
the probe... i just kinda like 5 minute sketch it, i could photograph the real probe and convert to B&W.
the EE alphabets, i would loved if the wires comes out of the probes will be curled to form the EE letter.
not really like the cartoon like look. should looks more pro with less curvy... more like the jharsem font design.
so much improvement to be made, as i said... just an idea for another better logo.