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- Nov 28, 2011
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Because of those corrections, the proper value for R1 is about 0.54Ω. I suggest you use four 2.2Ω 0.5W 1% metal film resistors in parallel, which will give you 0.55Ω, and connect another resistance in parallel to drop that down to 0.54Ω. The calculated value is 29.7Ω and 30Ω would be close enough, or use a 50Ω trimpot and a very accurate low ohms meter (using a four wire measuring method) to adjust the trimpot to give the right value.
I don't think there's any point being that accurate, because the figures I used in my calculations are all just typical parameters, not exact values.
Did you read and understand the section of post #13 that I quoted in post #19?
I don't think there's any point being that accurate, because the figures I used in my calculations are all just typical parameters, not exact values.
Did you read and understand the section of post #13 that I quoted in post #19?