I am attempting to replace a wall plug power supply with a supercapacitor. From analysing the behaviour of the wall plug I can see that the current drawn is .25A with 800ms spikes of 1.5A (as determined by an arduino board).
However when I try to use the supercapacitor (15F, 7VDC), the voltage appears fine, but not enough current is being drawn. The highest current I have seen drawn on the multimeter is .11A, so the system in question does not work.
I think this may be down to the internal resistance of the supercapacitor. So the next step I will try is to increase the number of supercapacitors and place them in parallel, thereby decreasing the resistance.
However as supercapacitors are advertised to be capable of charging in a matter of seconds, surely this means they can handle a high current (at least 1.5A anyway). Or will supercapacitors draw more current during charging than they would be capable of supplying during discharge?
Any help here is greatly appreciated.