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INDEX |
MY EXPERIENCE IN AUTONOMOUS ROBOTICS | |
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Capacitors Available capacitance values Capacitor Identification Important thing about Capacitor
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CAPACITOR A capacitor is used to store charge. Like resistors there is fixed as well as variable capacitor also. But we mostly use fixed capacitor in robotics, variable capacitors are mainly used in analog communication. There are capacitors with no polarity and polarity. Ceramic and Mica capacitors available are of no-polarity, but electrolytic capacitors are of polarity. There is a variation in their symbols also.
In the above figure we can see that the different symbols for capacitors. Mica and ceramic capacitor don't have polarity while electrolytic have polarity, so one lead of electrolytic capacitor is bend(-ve lead). We can identify negative lead of electrolytic capacitor by checking the length of the lead, one with less length is -ve. On the body of electrolytic capacitor -ve symbol is shown. Be careful about electrolytic capacitor because inverting polarity can make 'explosion' (not firing) of capacitor(sometimes it can hurt your body). Every capacitor has two factors - value of its capacitance and other the maximum voltage rating.
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