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electronic:boards:arduino:unosmdclone [2026/10/21 19:33] – tonyelectronic:boards:arduino:unosmdclone [2026/10/22 21:00] (current) – [Schematics] tony
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 ===== Overview ===== ===== Overview =====
 +This is a budget no-name Arduino Uno SMD clone with an CH340G USB interface rather than an ATmega16U2.  I also note both the genuine Arduino Uno SMD and this one use a ceramic resonator instead of a more precise and stable 16MHz crystal oscillator.  My example had a very crookedly mounted USB-B socket, and when I tried to resolder it flat onto the board it shorted something, disabling the USB port - so had to undo my fix :-(, and put up with it pressing on the underside of any Arduino shield mounted above.
 +
 +So a cheap Arduino Uno clone for applications not requiring precise timing or expectations of longevity :-).
  
 ===== Features  ===== ===== Features  =====
   * Microcontroller: ATmega328P   * Microcontroller: ATmega328P
-  * Clock Speed: 16 MHz crystal oscillator+  * Clock Speed: 16 MHz ceramic resonator
   * 14 digital input/output pins (6 can be PWM outputs)   * 14 digital input/output pins (6 can be PWM outputs)
   * 6 analog inputs   * 6 analog inputs
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   * Input Voltage: 7-12V   * Input Voltage: 7-12V
   * 3.3V Power Out: up to 50 mA   * 3.3V Power Out: up to 50 mA
-  * 5V Power Out: up to 
   * I/O Pin Out: up to 20 mA   * I/O Pin Out: up to 20 mA
   * Digital I/O Pins: 14 (6 support PWM output)   * Digital I/O Pins: 14 (6 support PWM output)
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 ---- ----
 ===== Schematics ===== ===== Schematics =====
-{{electronic:boards:arduino:uno_pighixxx.png?800|Pinout (unofficial)}} ((from https://web.archive.org/web/20171110175921/http://www.pighixxx.com/test/wp-content/uploads/2014/11/uno.png CCBYSA pighixxx.com)) +/* {{electronic:boards:arduino:uno_pighixxx.png?800|Pinout (unofficial)}} ((from https://web.archive.org/web/20171110175921/http://www.pighixxx.com/test/wp-content/uploads/2014/11/uno.png CCBYSA Alberto Piganti)) 
-{{electronic:boards:arduino:a000066-pinout.png?800|Pinout}} ((from https://docs.arduino.cc/resources/pinouts/A000066-full-pinout.pdf CCBYSA Arduino.cc)) +{{electronic:boards:arduino:a000066-pinout.png?800|Pinout}} ((from https://docs.arduino.cc/resources/pinouts/A000066-full-pinout.pdf CCBYSA Arduino.cc)) */ 
-{{electronic:boards:arduino:a000066-schematics.png?800|Arduino UNO schematic}} ((from https://docs.arduino.cc/resources/schematics/A000066-schematics.pdf CCBYSA Arduino.cc))+{{electronic:boards:arduino:arduino-uno-rev-3-smd-clone-pinout-high-resolution.png?800|Pinout}} ((from https://mischianti.org/arduino-uno-rev-3-ch340-smd-clone-high-resolution-pinout-datasheet-and-specs/ CCBYNCND mischianti.org)) 
 +{{electronic:boards:arduino:ch340g_uno_arduinoboard_3a_bw.png?800|Arduino UNO schematic}} ((from https://www.mikrocontroller.net/attachment/258727/CH340G_UNO_ArduinoBoard_3.pdf CCBYSA))
  
 +Seems to be the same as this schematic but an MIC5205-3.3YM5 (labelled KB33 on a SOT-23-5 SMD chip) has been substituted for the LP2985-33 LDO regulator.
 \\ \\
 ---- ----
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 {{electronic:boards:arduino:pa204427a.jpg?800|Uno SMD clonebottom view}} {{electronic:boards:arduino:pa204427a.jpg?800|Uno SMD clonebottom view}}
  
-^Genuine Arduino Uno R3 SMD :^ +\\ 
-{{electronic:boards:arduino:arduino_uno_microcontroller.jpg?800|Genuine Arduino Uno R3 SMD top view}}((from https://commons.wikimedia.org/wiki/File:Arduino_UNO_microcontroller.jpg CCBYSA Alyona Makarenko))+---- 
 +^Genuine Arduino Uno R3 SMD  :^ 
 + 
 +/* {{electronic:boards:arduino:arduino_uno_microcontroller.jpg?800|Genuine Arduino Uno R3 SMD top view}}((from https://commons.wikimedia.org/wiki/File:Arduino_UNO_microcontroller.jpg CCBYSA Alyona Makarenko)) */ 
 +{{electronic:boards:arduino:arduinounosmd.jpg?800|Genuine Arduino Uno R3 SMD top view}} ((from http://arduino.cc/en/uploads/Main/ArduinoUnoSmd.jpg CCBYSA arduino.cc))
  
 ====== References and Additional Resources ====== ====== References and Additional Resources ======
-  * [[https://docs.arduino.cc/hardware/uno-rev3|Arduino UNO docs]] +  * {{https://mischianti.org/wp-content/uploads/2023/11/Arduino-UNO-Rev-3-CH340-SMD-clone-manual.pdf|A Uno SMB clone manual}} 
-  * {{https://docs.arduino.cc/resources/pinouts/A000066-full-pinout.pdf|Pinout details (official)}} +  * [[https://docs.arduino.cc/hardware/uno-rev3-smd|Arduino UNO SMD docs (genuine version)]] 
-  * {{https://docs.arduino.cc/resources/schematics/A000066-schematics.pdf|Schematic}}+  * {{https://docs.arduino.cc/resources/pinouts/A000066-full-pinout.pdf|Pinout details (genuine version)}} 
 +  * {{https://docs.arduino.cc/resources/schematics/A000066-schematics.pdf|Schematic (genuine version)}}
  
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electronic/boards/arduino/unosmdclone.1792611209.txt.gz · Last modified: 2026/10/21 19:33 by tony
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