Have you ever wondered why ordinary paper capacitors are used in most sensor circuits?

A paper capacitor is made of two very thin ribbon-like strips with waxed paper as an insulator between the strips and wrapped around each other in a cylindrical shape.

The connection points are the individual links that are attached to the metal strips. Similarly, polyester insulators are made using polyester as an insulator. A ceramic insulator is made by using a ceramic insulator between two thin plates. Ceramic capacitors are produced in low-value quantities. Similarly, if mica is used as an insulator, it is called a mica condenser.

The values of such capacitors are as low as ceramic ones. All types of condensers can be operated on both AC and DC power.

Apart from that, AC and DC are used to transmit signals from one area to another, eliminate unwanted interference signals, generate radio frequencies, modify the nature of the wave, modify the nature of audio frequencies, and determine the quality of the sound through phone control and equalizers systems, and time.

 Delay circuits are also widely used to store small amounts of current, block DC current, and many other operations.

Paper capacitors are widely used for noise filtering, coupling, decoupling, blocking DC signals, and allowing AC signals into the circuits. These paper capacitors are also used in sensors such as humidity sensors and fuel sensors. Most sensors have paper capacitors because these are very sensible like touching sense. Paper capacitors easily detect humidity because of their sensitivity.

How to measure the value of the capacitors?

The value of the capacitor is marked on it. Colors are shown as resistors. Just like the registers, we need to change the value of 1000 PF, which means 1 Kilo Pico farad, from the total obtained by taking into account the first three colours. Farad is the SI unit of capacitors, so we use multiple values of farad.

The fourth and fifth colours indicate the tolerance and working voltage, so there is no need to do much research on the last four and five colour numbers for transistor radios.

For example,

  If the numbers 104 are printed on a capacitor, they must be rounded off to 100000 PF values to KPF.

This means the number 10 is taken and the number 4 is taken as four zeros (0000). So 10, 0000 PF  is also equal to 1 KPF.