Can I run a device using the energy from the cap?
I don't want to run the device directly from a battery.
I know a way to load a capacitor in less than 1 second. My idea is to run a device using only the energy from the cap. Of course, I will need to re-charge again and again the capacitor if I want to achieve that.
But... It's possible to run a device using the energy stored in a cap?
I have other question... How can I calculate the discharge time of the capacitor? Imagine I have the 400V 3.3uF cap and I want to run a 25 Watt device... How much time can I run the 25 watt device?
Sorry for my english.
The energy on a capacitor is ½CV², thus a 3.3µF cap charged to 400V has an energy of .264 joules. Since a joule equals a watt-second, if you could use the total energy (which is not possible in practice) to power your 25W load it would last for .264WS ÷ 25W = 10.6ms.