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@@ -70,3 +70,15 @@ DP 10
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1 - I2C-SDA (подтянуты к 3в)
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2 - I2C-SCL (подтянуты к 3в)
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---
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+Дільник на ОУ
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+резистори: 84B - 7.32 кОм, 01D - 100 кОм, 01B - 1 кОм, 01A - 100 Ом (±1%).
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+Ku = 7.32/100 = 0,0732
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+Ki = 7.32/1 = 7.32
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+Живлення 3 В.
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+Max U = 3/0,732 = 40,9836 V
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+Max I = 3/7.32/0.05 = 8,1967 A (Shunt = 0.05 Ohm)
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+
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+Потрібно: MaxU<=21V, MaxI<=21A (shunt = 0.01 Ohm)
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+new Ku: 21/3 = 7, replace 84B res by 15кОм, K == 0.15, MaxU == 3/0,15 = 20V
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+new Ki: (3/(0.01*21)) ~= 14.28, replace 84B res by 15кОм, K == 15, MaxI == 3/15/0.01 = 20A
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+---
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Vladimir N. Shilov