I've talked before about my electronic projects. About how my eyes are getting weaker and electronic components are getting smaller. Here is another example and a fix.
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The circuit board, above, is my first attempt at designing a circuit board. It's kind of fun. Lots of different options to tradeoff.
I needed precision resistors for this circuit and, it turns out that available precision resistors are surface mount devices. There are 4 sizes of surface mount resistors. I chose the biggest size, a strip of 10 resistors is shown below with a dime. The smallest size is about 1/4 this size.
Think about it this way. The size of the number printed on the resistor is between the "In God We Trust" and the date on the dime.
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For another circuit, I need to solder the 8 individual terminal of this opamp. How was I ever going to see stuff this little to solder it? I needed some help.
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My answer, the fix if you will, is a stereo microscope with 20x and 40x.
The rule is, when your body can't compete, cheat.