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electronic:boards:shield:xc4454 [2026/10/16 07:39] – tonyelectronic:boards:shield:xc4454 [2026/10/16 09:35] (current) – tony
Line 9: Line 9:
 ^Brand|Duinotech| ^Brand|Duinotech|
 ^Clone of|{{https://dfimg.dfrobot.com/enshop/image/data/PDF/Manual/DFR0009_Manual__10_cn.pdf|DFRobot LCD Keypad Shield (2009)}}| ^Clone of|{{https://dfimg.dfrobot.com/enshop/image/data/PDF/Manual/DFR0009_Manual__10_cn.pdf|DFRobot LCD Keypad Shield (2009)}}|
 +^Other designations|DFR0009|
 ^Arduino compatibility|Uno| /* Uno, Uno R3, Mega, Mega2560 etc */ ^Arduino compatibility|Uno| /* Uno, Uno R3, Mega, Mega2560 etc */
 ^Type|LCD with keypad| ^Type|LCD with keypad|
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   * 16 Columns x 2 rows of text display   * 16 Columns x 2 rows of text display
   * Blue backlight   * Blue backlight
-  * 5 Push button keypad (labelled up, down, left, right and reset)+  * 6 Push button keypad (labelled select, up, down, left, right and reset)
   * Contrast control   * Contrast control
   * Display uses standard 4bit LCD library   * Display uses standard 4bit LCD library
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 From the published schematic I can see that the Arduino D10 drives the base of a transitor directly (with no current  limit resistor), this may be the problem he describes. From the published schematic I can see that the Arduino D10 drives the base of a transitor directly (with no current  limit resistor), this may be the problem he describes.
  
-[[https://www.stubmandrel.co.uk/16-electronics/236-dfrobot-lcd-keypad-shield-backlight-fix|Suggested fix and light level control.]] +  * [[https://forum.arduino.cc/t/warning-to-users-of-some-vendors-lcd-keypad-shields/94673/2|Fault description]] 
-https://www.instructables.com/Arduino-LCD-Backlight-Fix/+  * [[https://web.archive.org/web/20121101083518/http://arduino.cc/forum/index.php/topic,96747.0.html|Follow up discussion]] 
 +  * [[https://www.stubmandrel.co.uk/16-electronics/236-dfrobot-lcd-keypad-shield-backlight-fix|Suggested fix using a resistor, and light level control code.]] 
 +  * [[https://www.instructables.com/Arduino-LCD-Backlight-Fix|Suggested fix using a diode.]] 
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