Let's Make Robots!

Super Capacitor


Vendor's Description: 

Description: Yes you read that correctly - 10Farad capacitor. This small cap can be charged up and then slowly dissapated running an entire system for hours. Combine two in series for 5F/5V. Do not over voltage or reverse polarize these capacitors.

Description: Yes you read that correctly - 10Farad capacitor. This small cap can be charged up and then slowly dissapated running an entire system for hours. Combine two in series for 5F/5V. Do not over voltage or reverse polarize these capacitors. (from Sparkfun)

 

Just as a reminder:

Capacitors in series get a total capacitance(Ctot) of:  

(1/Ctot)=(1/C1)+(1/C2)+...+(1/Cn)   which is like saying   Ctot=[(1/C1)+(1/C2)+...+(1/Cn)]^-1

Capacitors in parallel get:

Ctot=C1+C2+...+Cn

The voltage rating is the max voltage it can take. (http://letsmakerobots.com/node/1988)

 

some formulae:

i=(f/R)*e^(-t/τ)

ΔV=f*e^(-t/τ)

 

where τ=R*C

and f is the potential difference of the capacitor at the beginning 


 

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Like batteries you can put them in series to increase their voltage.  2 in series will bring the voltate up to 5v and the capacitence down to 5F.  Putting 3 in series will give you 7.5v and 3.3F.
i tought i browsed everything on sparkfun, but i don't remember this super cap :P