arduino 24v input


The model number is s: 5. 5 c 3, 5 30, and this has an operating voltage of between 10 and 30 volts DC, and that is too high for the Arduino to handle because they can only handle 5 volts. So we’re going to be using a voltage divider to reduce the voltage to a level that the Arduino can safely sense. So my setup is an Arduino Arduino Uno, a 24 volt power supply breadboard with 10k resistors multimeter, the sensor mm, hmm, so let’s get started I’ll. Just show you that it works really quick turn on my power and if you look at the LED on the Arduino and my finger covers up the sensor, it sets off that LED and has a range of about that long. You can adjust this potentiometer right there to adjust the sensitivity, but just to show you the theory behind this I’ve draw drawn. The circuit diagram here is the circuit for the entire system. This is the proximity sensor with the different colors of wires, it’s uh. You can adjust, you can set this one up to be a PNP sensor or an NPN sensor, but uh. I chose to set this one up as a PNP and so here’s the power supply, the Arduino we’re using a digital input, and these two components are what make up the voltage divider and the way this works is, if you have an input, voltage that’s too high. You can use two resistors to reduce it to a level that’s safe using this equation right here, so you just select the r1 and our two values that make the voltage between the two safe.

In this case, I’ve chosen to have r1 as 40000 kilo, ohms and r2 as 10000 kilo ohms. That reduces the voltage that’s being supplied to the Arduino and to about 4.7 volts, which is enough for the Arduino to recognize a high signal on a digital input and to show you that this works I’ll come over here to the Arduino I’m. Going to attach. This thing to my hat – hopefully you guys can still see we’ve got our multimeter here, and these resistors make up the voltage divider. These are all 10k resistors and you have one two, three, four of them in series to make up a 40000 kilohm, capacitor and effect and essence. So if we measure the voltage between the the the sensor down, there is sensing something so this should be high. So if I measure the voltage difference between the input, I can get it and the ground it’s at 22 volts. So if I measure the voltage between this node right here, which is dividing the voltage by a small amount, it should be less and we get 18 volts and the next node, which should be dividing it even greater, is 13 volts. The next one is 9 volts, and the last one, which is the one that’s going to be feeding to our Arduino, is 4.5 volts, and that is exactly what we need. And that means that whenever this thing senses something for for 4.5, volts is supplied to the digital input of this Arduino and causes.

This led to blink hope that this was helpful, leave any comments or questions.


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Originally posted 2016-05-21 17:00:27.

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  1. Joseph, nice to see your tutorial, can you guide me if I want to test 11KV or 132KV with Arduino? what sensor/detector will be used? how should I make Arduino capable to do that?


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