Super Capacitor Applications

Super Capacitors make an ideal re-usable power source

Until recently, if you wanted a small amount of power, you could charge up an electrolytic capacitor - if you needed any more power, then you would have to opt for batteries. Now there is the choice of a super capacitor. These are perfect for applications where the capacity of a standard electrolytic capacitor is too small and a rechargeable battery is bigger than needed. In these two examples below, you will see that they are extremely easy to use.

Rechargeable White LED Torch

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This very simple circuit shows how a super capacitor can be used to create a rechargeable torch. The super capacitor is charged when it is connected to a 5V DC power source such as a USB port, power supply or batteries. The capacitor charges within a few seconds and will power the LED for over 10 minutes.

Rechargeable Vehicle

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This circuit charges the super capacitor in the same way as the torch but this time is used to power a solar motor. The motor runs for around 10 - 15 seconds. A perfect application for this is to see who can design a buggy that will travel the furthest before the capacitor is discharged.

Why use a 10ohm Resistor?

The 10ohm resistor is needed to control the rate at which the capacitor charges. Without it the capacitor would charge instantly pulling a large amount of current which could damage the power source.

super_capacitor_applications_3Buying Super Capacitors

We stock a 1F super capacitor (shown left) that has a maximum working voltage of 5.5V. Diameter 20mm, height 6.5mm, lead pitch 5mm.

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