Hello, I have a question: Did I draw the NPN transistor correctly? I am attempting to draw three NPN transistors and three resistors (1k ohms, 2k ohms, and 3k ohms) in the same manner. The goal is for the sensor to detect a mass within different ranges—for example, low ranges would use 1k ohms, middle ranges 2k ohms, and 3k ohms for higher mass ranges—and to automatically swap resistors accordingly. However, I am somewhat confused about how to draw and connect them to the Arduino. My apologies for any poor drawings or mistakes, as I tried to learn from YouTube and did my best. If I am wrong, please correct me.
I moved your topic to an appropriate forum category @gamewalk43.
In the future, please take some time to pick the forum category that best suits the subject of your topic. There is an "About the _____ category" topic at the top of each category that explains its purpose.
This is an important part of responsible forum usage, as explained in the "How to get the best out of this forum" guide. The guide contains a lot of other useful information. Please read it.
Thanks in advance for your cooperation.
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We need you to flesh this project out more.
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See this for schematics.
https://learn.sparkfun.com/tutorials/how-to-read-a-schematic/all
Because my goal is to able to make this in Arduino with using breadboard.
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A BJT requires a base resistor to limit the base current.
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What sensor are you using.
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Why would youneed ranges that are so close together? Usually ranges are 10 fold apart.
I am nut sure if I understand what you want to build. But I ges mosfets would be better as those can really bring your resistor to 0V when the gate is set high.
As said: a base resistor is needed for each transistor. 1 kohm will do.
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