andsetinn:

Ok, see where I go wrong with this. Because your conclusion does not make sense to me.

I am a pre-service high school teacher so I will look at this like a highschool experiment.

There are 3 capacitors, I name them A,B,C.

Capacitor A has 1000uf capacity, 10 volts rating.

Capacitor B has 470uf capacity, 10 volts rating.

Capacitor C has 470uf capacity, 25 volts rating.

My controls are:

- 1000uf, 10 V for capacitor A

- 470uf for capacitor B and capacitor C

So the objective of this experiment is:

To test how different voltage ratings on capacitors affect ESR.

This done by first comparing the ESR of:

#1. capacitor A with capacitor B

#2. capacitor A with capacitor C

Results:

Your wrote:

"On the table that is written on my ESR meter, a 470 uf, 10 volt capacitors ESR is listed as having double the ESR of 1000 uf 10 volt capacitor.

A 470 uf 25 volt capacitor has the same ESR as the 1000 uf 10 volts capacitor in the previous example."

I will translate that into:

Case #1: (Same voltage, Different capacitance)

470uf, 10 V capacitor has DOUBLE the ESR of 1000 uf 10 V capacitor.

Case #2: (Same ESR, Different voltage and capacitance)

470uf, 25V capacitor has the SAME ESR as 1000 uf 10 V capacitor.

Therefore:

Capacitor A has 2x the ESR of Capacitor B.

Capacitor A has the same ESR as of Capacitor C.

Am I correct?

Capacitor C has higher voltage ratings than Capacitor B.

Assuming that voltage and capacitance are the only two parameters affecting ESR, the conclusion I can draw from your ESR table is:

Lower voltage rating = Lower ESR.

(Which should be true. Can someone please comment to see if my interpretation is correct?)

You said that:

"That gives the conclusion that you get roughly the same ESR for given capacitance at the same voltage, no matter how many capacitors you've got."

I cannot see how you can draw your conclusions from your ESR table. Enlighten me please.

For everyone else who still have the paitence to read:

My question is simple, will additional resistance (due to wires, and solder joints) change the ESR value of a capacitor?

My next question is:

Which setup has more ESR?

setup#1 1x 1000uf,10V capacitor.

setup#2 10x 100uf, 10V capacitors in parallel.

Please give explaination!

Additional questions for the hardcore tekies out there:

How is ESR different from resistance?

Where does ESR come from?

What is factors affect ESR?

Thankyou all for taking the time to enlighten a lost newb in the rc world.