manual/plugins/resistor.tex

   1 \subsection{Resistor Calculator}
   2 \screenshot{plugins/images/ss-resistor}{Resistor calculator}{img:resistor}
   3
   4 The resistor calculator is a plugin that works in 3 modes:
   5
   6 \subsubsection{Colour to Resistance}
   7
   8 In Colour to Resistance mode, use the menus to select the colours of the
   9 bands of a resistor which you would like to know the resistance of.
  10
  11 \subsubsection{Resistance to Colour}
  12
  13 In Resistance to Colour mode, use the menus to select the unit that you
  14 would like to use (choose from Ohms, Kiloohms, Megaohms), and use
  15 the on-screen keyboard to input the value of the resistor that you would
  16 like to know the colour code of. The colour codes are presented
  17 \opt{lcd_color}{graphically and} textually.
  18
  19 \subsubsection{LED resistance}
  20
  21 LED resistance calculator is used to determine the resistor necessary to light
  22 an LED safely at a given voltage. First, select the voltage that the LED will
  23 use (the first option is the most common and a safe bet), and the current
  24 that it will draw (likewise with the first option). Then, use the onscreen
  25 keyboard to type in the supply voltage and, if selected, the custom
  26 forward current. This function produces safe estimates, but use your own
  27 judgement when using these output values. Power rating and displayed resistance
  28 are rounded up to the nearest common value.