Arduino humidity sensor 7-segment display



I have had a long time to check the humidity.

But, after a long while, I do not remember.

So I'll start with a very basic one.


1. Check humidity sensor


https://jujakfire.blog.me/221143897910?Redirect=Log&from=postView

2. Check 7-FND

http://deneb21.tistory.com/229



3. Use 7-FND Library

4. Sketch Coding

#include "SevSeg.h"
#include "AM2320.h"

//Create an instance of the object.
SevSeg sevseg;
AM2320 th;
void setup() {
  // Set up pins
  // Arguments :
  // First 0 is for common cathode
  // Following 0 to 11 numbers are for Arduino pins
  // connected to display in the following order
  // 1,2,3,4,A,B,C,D,E,F,G,DP
  sevseg.Begin(0,1,2,3,4,5,6,7,8,9,10,11,12);
}

void loop() {  
   th.Read();                          // AM2320 Read
   float huminity=th.h*100.0;
   int hDisplay=huminity;
  // Prepare number to display, and dot position
  // (0 to 3, other number means no dot) 
  sevseg.NewNum(hDisplay,2);
  // Display number
  sevseg.PrintOutput(); 
  // To maintain display with this wiring,
  // we are forced to loop over those commands rapidly
  delay(5);                         // Delay Time
}



The color change of lithium

If there is a color change in the glove box after depositing the lithium thin film, it can not be regarded as a normal state.

Depending on the degree of nitrogen and moisture, it turns black, brown or yellow.

https://www.cdc.gov/niosh/ipcsneng/neng0710.html





Why should I use argon gas in the glove box of lithium deposition equipment?

A typical glove box uses nitrogen. However, the glove box for lithium evaporators requires argon gas, which must also be high purity argon. Lithium reacts with nitrogen at room temperature and turns black.

Galvanic corrosion prevention measures

Galvanic corrosion prevention measures
It is important to anticipate the damage caused by galvanic corrosion when choosing equipment or equipment used in a corrosive atmosphere and minimize the damage by considering the following preventive measures.
① Selection of similar dislocation metals: Select metals that are located as close as possible to the galvanic system.
② Be careful not to cause contaminants (oil, welding spatter, etc.) on the surface. (Complete removal required)
③ External power supply method: It eliminates the potential difference by hanging the power source from the outside at the end of the cathode and anode parts. (Referred to as an external power supply method)
④ Sacrificial Anode method: A third metal (such as scavenger - zinc anode) that is more active is brought into contact with the two metals of the galvanic pair.
⑤ Sacrificial anode method: It is designed to be easy to replace the part that acts as anode when designing.
⑥ Area Effect: The surface area of ​​the anode is large and the surface area of ​​the cathode is small. Ie the surface area of ​​the Lessnoble or active metal side.

The phenomenon that occurs when the insulator of the e-beam feed-through breaks


If the insulator of this e-beam feed-through is broken, it can not be grasped visually, and it is quite difficult to find the cause.

There is nothing wrong with this, but if you start to generate an arc from a certain amount of power, it is a good idea to suspect that the electrode feed-through breaks.

2024년 9월 13일 금요일 나의 투자 기록

 1. 사람은 각자의 고민이 있게 마련이다. 이게 어떤 조직을 이루고 있고, 많은 사람이 그 조직에 섞여 있으면서 각자의 고민이 조직에 영향을 주게 된다. 즉 문제가 발생하는 요인이 되는 것이다. 다른 사람의 고민을 감지하고, 고민을 알게 되었다면 2...