I have this problem with my bridge I'm trying to convert AC voltage to DC generated out of a small 12V/DC motor.

I generated almost 8.4V/AC. I'd like to convert it using my bridge,so I made a simple rectifier using this schematic.

Added a 1000uF capacitor at 16 volts to smooth out the DC output and I followed this formula to calculate the expected voltage Vin/AC x 1.4 = Vout/DC.

And here's the result:

http://imageshack.us/f/855/img2011111801154.jpg/

*Here's the problem... I made the "full wave bridge rectifier" and tested out the product I had 8.4V/AC in and I got almost 3.4 Volts DC out, I thought the voltage would be 11.76V/DC than "3.4" according to that smoothing formula "V/ACin x 1.4 = V/DCout".

What do you all think is the problem?

I used another capacitor 4700uF at 16 volts and the output was almost 2.6V/DC... What am I doing wrong? Or is it just normal?

lets say even if there was a voltage drop I thought it would be some simple number not that much of a drop .

Here are some pictures so you guys can see what I'm dealing with.

capacitor( 1000uF at 16V) + bridge:

http://imageshack.us/f/404/img2011111801155.jpg/

*Bridge(Close up):

http://imageshack.us/f/651/unled1ayk.jpg/

*Capacitors"1000 uF at 16V & 4700 uF at 16V":

http://imageshack.us/photo/my-images/196/img2011111801152.jpg

*NOTE* The capacitor was installed incorrect in the picture. I used it right in the testing - with - and + with +"

If you are all asking about the type of motor its a brushless one.

Thanks.