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From: Matt on 2012-07-23 18:27:06
Close-up of four of the 1000uF capacitors. Two of these have a 25V rating and two 16V. Electrolytic capacitor voltage ratings are funny: normally you think of a voltage rating for a component as being the MAXIMUM voltage the component can tolerate, and it's true that an electrolytic capacitor will probably blow out if you run it much over its rated voltage. However, they also *need* voltage in order to maintain their dielectric layers. So if you run the capacitor significantly below its voltage rating, that will also cause it to fail eventually. You really need to get the voltage right, not "err on the safe side" with a higher rating.