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.

2025년 1월 15일 축구 스포츠 토토 프로토 승부식 7회차 축구 경기 예상

 1. 배팅 가능한 경기를 추려보면 8경기가 배팅 가능한 경기이다. 2. 가장 적합한 배팅은 사실 2경기 밖에 없다. 스페인FA컵 173번 경기와, 186번 EPL 맨체스터유나이티드와 사우샘프 경기이다. 찝찝한 것이 20위 팀과의 경기는 이상하게 예상...