About 4,000 ohms is what i got. 3,975 taking into account the voltage drop of the opto. The confusion is because the example shows 130K resistors. Together thats 260,000 ohms. I work that out to be a voltage drop of 15,600 (i think)
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About 4,000 ohms is what i got. 3,975 taking into account the voltage drop of the opto. The confusion is because the example shows 130K resistors. Together thats 260,000 ohms. I work that out to be a voltage drop of 15,600 (i think)
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They may also be taking into account that it's AC so the average current can be a bit higher as it's not steady state (i.e. continuous).
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