New plugin: Resistor code calculator

Flyspray: FS#11585
Author: Calvin Walden


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28191 a1c6a512-1295-4272-9138-f99709370657

apps/plugins/CATEGORIES

@@ -73,6 +73,7 @@ ppmviewer,viewers
 properties,viewers
 random_folder_advance_config,apps
 remote_control,apps
+resistor,apps
 reversi,games
 robotfindskitten,games
 rockblox,games

apps/plugins/SOURCES

@@ -28,6 +28,7 @@ dice.c
 disktidy.c
 flipit.c
 shopper.c
+resistor.c
 
 
 #ifdef USB_ENABLE_HID

apps/plugins/bitmaps/native/SOURCES

@@ -886,5 +886,21 @@ pitch_notes.128x64x1.bmp
 #endif
 #endif /* Complex condition for pitch detector */
 
+/* Resistor Calculator */
+#if (LCD_WIDTH >= 320)
+resistor.320x240x16.bmp
+#elif (LCD_WIDTH >= 240)
+resistor.240x400x16.bmp
+#elif (LCD_WIDTH >= 220)
+resistor.220x176x16.bmp
+#elif (LCD_WIDTH >= 176)
+resistor.176x220x16.bmp
+#elif (LCD_WIDTH >= 160)
+resistor.160x128x16.bmp
+#elif (LCD_WIDTH >= 132)
+resistor.132x80x16.bmp
+#elif (LCD_WIDTH >= 128)
+resistor.128x128x16.bmp
+#endif
 
 #endif /* HAVE_LCD_BITMAP */

docs/CREDITS

@@ -560,6 +560,7 @@ Alexey Polkhirev
 István Nagy
 Wojciech Lesniak
 Tuomas Airaksinen
+Calvin Walden
 
 The libmad team
 The wavpack team

manual/plugins/main.tex

@@ -253,6 +253,8 @@ option from the \setting{Context Menu} (see \reference{ref:Contextmenu}).}
 
 {\input{plugins/random_folder_advance_config.tex}}
 
+{\input{plugins/resistor.tex}}
+
 \opt{lcd_color}{\input{plugins/rockpaint.tex}}
 
 \opt{archosrecorder,archosfmrecorder,ondio}{\input{plugins/split_editor.tex}}

manual/plugins/resistor.tex

@@ -0,0 +1,28 @@
+\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 
+foreward current. This function produces safe estimates, but use your own
+judgement when using these output values. Power rating and displayed resistance
+are rounded up to the nearest common value.