2010-10-02 14:11:40 +00:00
|
|
|
\subsection{Resistor Calculator}
|
|
|
|
|
\screenshot{plugins/images/ss-resistor}{Resistor calculator}{img:resistor}
|
|
|
|
|
|
|
|
|
|
The resistor calculator is a plugin that works in 3 modes:
|
|
|
|
|
|
|
|
|
|
\subsubsection{Colour to Resistance}
|
|
|
|
|
|
|
|
|
|
In Colour to Resistance mode, use the menus to select the colours of the
|
|
|
|
|
bands of a resistor which you would like to know the resistance of.
|
|
|
|
|
|
|
|
|
|
\subsubsection{Resistance to Colour}
|
|
|
|
|
|
|
|
|
|
In Resistance to Colour mode, use the menus to select the unit that you
|
|
|
|
|
would like to use (choose from Ohms, Kiloohms, Megaohms), and use
|
|
|
|
|
the on-screen keyboard to input the value of the resistor that you would
|
|
|
|
|
like to know the colour code of. The colour codes are presented
|
|
|
|
|
\opt{lcd_color}{graphically and} textually.
|
|
|
|
|
|
|
|
|
|
\subsubsection{LED resistance}
|
|
|
|
|
|
|
|
|
|
LED resistance calculator is used to determine the resistor necessary to light
|
|
|
|
|
an LED safely at a given voltage. First, select the voltage that the LED will
|
|
|
|
|
use (the first option is the most common and a safe bet), and the current
|
|
|
|
|
that it will draw (likewise with the first option). Then, use the onscreen
|
|
|
|
|
keyboard to type in the supply voltage and, if selected, the custom
|
2011-08-09 14:39:32 +00:00
|
|
|
forward current. This function produces safe estimates, but use your own
|
2010-10-02 14:11:40 +00:00
|
|
|
judgement when using these output values. Power rating and displayed resistance
|
|
|
|
|
are rounded up to the nearest common value.
|
