Led Power

November 5th, 2007

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Can i use non-polariezed capicators instead on polarized?

well i need a 0.01uF polarized capicator for a 555 to work on 1KHz freq for a white led power supply of 100maH so i wonder if i can use the same value non polarized if you now some way to make a 4.5v pulse on 10% duty cycle with 1khz pls say it

Capacitors have, first, a value of capacitance. Second, they also have a voltage rating that is not to be exceeded. And third, there are different materials used to make capacitors. Each material has its own properties and affects the rest of the circuit. Different materials are used to achieve small values, or higher stability, or perhaps smaller physical size. Each has its own pros and cons.

Most of the time, polarity is a function of the materials used. If you find a different type that still has the same value, but is not polarized, you can probably use it. I say Probably, because the material will be different and may not be as stable for precision timing. But nothing 'bad' will happen. The only problem with polarized caps is installing them backwards. Tantalum caps have a nasty habit of popping their tops, sounding like a firecracker went off.

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