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| Both sides previous revisionPrevious revisionNext revision | Previous revision |
| electronic:boards:shield:xc4454 [2026/10/16 08:52] – [Features] tony | electronic:boards:shield:xc4454 [2026/10/16 09:35] (current) – tony |
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| ^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| |
| 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. |
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| [[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://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|Suggested fix using a diode.]] | * [[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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