lithium flowers bloom » Electricity http://leejayxia.com/blog the weblog Sat, 15 May 2010 20:52:40 +0000 en hourly 1 http://wordpress.org/?v=3.2.1 Supposed-to-be-easy Electricity Lab http://leejayxia.com/blog/electricity-lab/ http://leejayxia.com/blog/electricity-lab/#comments Wed, 24 Sep 2008 04:23:43 +0000 L.J http://leejayxia.com/blog/?p=156 Spent still over two hours though., most of the time tweaking with the multimeter.

THE REGULATOR
5V regulator setting up showing switch 

Output: 4.97V
Input:16.47V
Voltage over LED: 2.088V
– over resister: 2.70V

LED IN SERIES

I don’t really have much to say about that…

LED A:2.52V
LED B:2.48V

Seems perfect? Not able to light up 3 LEDs in series though.

LED IN PARALLEL

 
 

Voltage over resistor: 2.86V
– over LED: 2.06V

Amperage calculated: 2.06V / 220 Om = 0.013A
Amperage read from meter: 0.013 – 0.014A

VARIANT VOLTAGE WITH A POTENTIOMETER

Voltage over LED while it’s:
– brightest: 3.00V
– medium: 2.60V
– dim: 2.43V
– off: 2.15V

This well explains why 3 LEDs in series didn’t work.

Special thanks to Neo for the power adaptor!

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