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Originally Posted by KenWittlief
I can honestly say that in my 20 years of electrical and computer design experience, on both military and commercial products, I have never used one, and I have never seen any product at any of the companies Ive worked for use one either.
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And there in lies the rub!
I can say in my 20+ years working for one major medical imaging company, among the dozens of other thing GE is into, that I have seen multiple systems and circuits, from various vendors and corporations, that do use 555's.
I guess my point is: Until you have seen everything, every situation, every design, every possibility, making blanket statements and setting hard and fast rules, with no room to bend, is just not a good idea.
BTW, I did a quick Google search and found a great little 555 circuit that will suffice perfectly to generate a 1 to 2 ms pulse at a period of 17ms. One 555, one cap, one pot and a resistor. It even had charts on the site for the mathematically impaired to help decide what component values to use.
Don't get me wrong, I understand the Prof.'s reasoning for doing things his way. He has every right and privilege as a Prof. to do so in his class room. But unless he meets the "
Until you have seen everything, every situation, every design, every possibility...." rule, his ways outside the class room aren't always the best ways.