PCB Capacitance Measurement and Applications

• Main Authors: HUANG, LIANG-CHING, 黃亮境
• Other Authors: CHEN,PAO-LUNG
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/h49232

碩士 === 國立高雄第一科技大學 === 電腦與通訊工程系碩士專班 === 105 === In the PCB board’s application for capacitors, capacitors changes due to the layout of the line and environmental temperature and humidity. This paper uses the meter and Arduino platform to measure three kinds of commercially available capacitors. The value of the measured capacitance; and in the two kinds of self-made PCB capacitor drop on the RO water to observe the water droplets at the same point and different points of the location changes. Finally, we calculate the slope and DHT11, DHT22 temperature hygrometer module sensing temperature and humidity. The measurement data and the minimum error on the label for the ceramic capacitor, the ceramic capacitor with largest error. The use of electric meters or Arduino measurement of commercially available capacitors. With the meter and Arduino measurement PCB capacitance 0 ~ 0.5ml water droplets change, comb And the spiral capacitor for the meter to measure the slope is good. When the two ways to measure the same point of water droplets and different points in the comb-type capacitor, all the water droplets at the same point on the slope of good. Capacitance, all the water droplets at different locations on the slope is good due to the PCB line to the same and the surface tension of water weakened, resulting in water droplets at different locations on the contact area is different. Finally, DHT11 and DHT22 capacitive temperature hygrometer module, DHT11 temperature measurement range of 0 ~ 50 degrees; DHT22 temperature measurement range of -40 ~ 80 degrees; both humidity measurement range of 20 ~ 90%. DHT11 and DHT22 in the two kinds of weather temperature data than the Central Meteorological Bureau about 2 degrees higher. The error range is acceptable. The humidity data than the Central Meteorological Bureau average about 52% lower accuracy, poor accuracy; it can be seen at the temperature DHT22 ratio DHT11 to the accuracy and stability. Humidity measurements may not use these two modules, the need for other measurement methods.