/diy/ - Do It Yourself

Anonymous Wed Sep 9 08:18:23 2020 No.1905543 [View]
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>>1904681
the 150 ohm resistor is just there to limit current through the sensor and is governed by the voltage and current limit of the sensor

the 62k resistor is a pull up resistor for the ttl logic drive and is also basically there to limit current into the 74 IC , pic rel is a formula to pic resistor values for pull ups ...it will mostly depend on the IC type and maximum current written in the datasheet....basically 10k is most of the time enough especially with newer ICs that are more robust

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/diy/ - Do It Yourself

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