Determination of the positive and negative terminals of a capacitor without a multimeter
We generally use a multimeter to measure the voltage, current, resistance and capacitance and other values, that if there is no multimeter how to determine the positive and negative capacitance?
Some of our common capacitors have polarity, some capacitors do not distinguish between polarity.
1. Do not distinguish between the polarity of the capacitor
Our most common CBB capacitors, ceramic capacitors, polyester capacitors are not polarity distinction, the use of polarity does not need to pay attention to.
2. Distinguish the polarity of the capacitor
Solid state capacitors. Solid capacitors can be distinguished according to the capacitor shell marked, shell marked with black is negative, or capacitor pin short is negative. Aluminium electrolytic capacitors. In the capacitor shell will be marked "-" symbol, marked on the side of the negative pole.
AC capacitors are not divided into positive and negative polarity, such as single-phase motor start capacitors, washing machine start capacitors, fan start capacitors, energy-saving lamps damping capacitors, etc. are AC capacitors, are not divided into positive and negative polarity, commonly used code is ACxx microfarad, do not have to distinguish between positive and negative polarity, TV, Dv, recorders, energy-saving lamps AC rectified DC voltage output DC capacitors used, often marked DCx × microfarad marked to live! General negative shell are marked with a "one of the standard, this negative corresponds to the negative end of the capacitor, the other foot is positive, do not need a multimeter at a glance to see the understanding.
Directly look at the appearance can be, then tell you how to look.
Capacitor is divided into polar capacitance and non-polar capacitance, non-polar capacitance is not divided into positive and negative poles, and only polar capacitance to distinguish between positive and negative poles.
