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Electronic board design: discrete variable value

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Hello,

I'm setting up a Mathcad document for electronic circuit project.

I need a variable wich value are not continuos, but discrete: resistors for example are not avaible in alla value .. so I decalred a vector with the possible value of the resistors in the market:

 

10 12 15 18 22 27 33 39 47 56 68 82 100 120 150 180 220 270 330 390 470 560 680 820 1000 1200 1500 1800 2200 2700 3300 3900 4700 5600 6800 10000 12000 15000 18000 22000 27000 33000 39000 47000 56000 68000 100000 120000 150000 180000 220000 270000 330000 390000 470000 560000 680000

 

How can I declare a new variable with only this possible value?
I'd like to try a solution block to minimize and maximize a value of a voltage splitter (Vsplit = (V1/(R1+R2))*R2), but the resistor value must be one of the market value.

 

Thankyou


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