In this instructable I tell you how to make a capacitor your own. This is very easy to make. However it can use with 230v

## Step 1:

You need
1. Aluminum foil
2. A4 sheet
3. glue
4. paper cutter
5. tape

## Step 2:

First cut 2 small strip of aluminum foil (about 2 x 15 cm )

Now get the A4 sheet and cut tow small strips (about 2.5 cm x 15 cm)

next, fall aluminum strip like in the picture

## Step 3:

now past them

1. paper
2. aluminum
3. paper
4. aluminum

Now, roll it and past a tape.

<p>I made it. I tried use a tape instead of a paper. My capacitor has C = 2.6 nF. After pressing the capacitor with my fingers, capacity is changing. Maybe after some experiments i will build a pressure sensor. Maybe.</p><p>For computing the capacity you can see formula e.g. here: http://www.daycounter.com/Calculators/Plate-Capacitor-Calculator.phtml</p>
<p>thank you for information.</p>
<p>sorry for late response. I'll make. But I think I'm too late. </p>
<p>i want the formula of motor starting capacitors like 80-110 uf and 138-182 uf and 200-250 uf and 250-300 uf and 300-400 uf and 400-450 uf and 450-500 uf....plz</p>
<p>You will need to either buy or salvage. You cannot build caps like that yourself. If you did, it would need to be about the size of an oil drum.</p>
<p>Built it using your dimensions (2 cm x 15 cm, folded foil about 13 cm long). My Fluke read around 7.68 uF, but I really don't know how accurate that is. It was only like 200k Ohms across it. None of the readings were very stable. I tried to blink a LED with a 555 timer but it didn't work.</p>
Cool! But Needs more explanation please. Put it to use to we can see how it can be handy
<p>how does it work</p>
<p>What is the capacitance? </p>
depends on the size of it
Ok so what is your largest cap. so far? What was the size of it?
<p>So, what is the capacitance of 1cm&sup3; on avarage?</p>
<p>Nice DIY capacitor</p>
<p>thanks</p>