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| electronic:boards:arduino:unosmdclone [2026/10/19 21:28] – created tony | electronic:boards:arduino:unosmdclone [2026/10/22 21:00] (current) – [Schematics] tony |
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| <html><p style="text-align:right;">Published 19 Oct 2026</p></html> | <html><p style="text-align:right;">Published 19 Oct 2026</p></html> |
| <html><p style="text-align:center;"><b><font size="6">Arduino UNO SMD clone</font></b></p></html> | <html><p style="text-align:center;"><b><font size="6">Uno SMD clone</font></b></p></html> |
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| {{ :electronic:boards:arduino:.jpg?200|Unosmdclone overview}} | {{ electronic:boards:arduino:pa204428a.jpg?200|Uno SMD clone overview}} |
| ^ Module Description || | ^ Module Description || |
| ^Model|**Unosmdclone Microcontroller**| | ^Model|**Uno SMD clone**| |
| ^Manufacturer|| | ^Manufacturer|made in China| |
| ^Brand|| | ^Brand| | |
| ^Clone of|-| | ^Clone of|Arduino Uno R3 SMD| |
| ^Description| | | ^Description|Standard Uno using SMD cpu| |
| ^Associated modules| | | ^Voltage|5V| |
| ^Voltage|| | |
| ^Current| | | |
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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. |
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| | So a cheap Arduino Uno clone for applications not requiring precise timing or expectations of longevity :-). |
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| ===== Features ===== | ===== Features ===== |
| * | * Microcontroller: ATmega328P |
| | * Clock Speed: 16 MHz ceramic resonator |
| | * 14 digital input/output pins (6 can be PWM outputs) |
| | * 6 analog inputs |
| | * Operating Voltage: 5V |
| | * Input Voltage: 7-12V |
| | * 3.3V Power Out: up to 50 mA |
| | * I/O Pin Out: up to 20 mA |
| | * Digital I/O Pins: 14 (6 support PWM output) |
| | * Analog Input Pins: 6 (with 10-bit resolution) |
| | * Flash Memory: 32 kB (2kB used by bootloader) |
| | * SRAM: 2 kB |
| | * EEPROM: 1 KB |
| | * Serial I/O: 4 UARTs, one SPI and one I2C interface |
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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 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: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)) |
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| | 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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| ===== Examples ===== | ===== Examples ===== |
| {{electronic:boards:arduino:.jpg?800|Unosmdclone overview}} | {{electronic:boards:arduino:pa204428a.jpg?800|Uno SMD clone overview right}} |
| | {{electronic:boards:arduino:pa204429a.jpg?800|Uno SMD clone overview left}} |
| | {{electronic:boards:arduino:pa204430a.jpg?800|Uno SMD clone overview back}} |
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| | {{electronic:boards:arduino:pa204422a.jpg?800|Uno SMD clone top view}} |
| | {{electronic:boards:arduino:pa204427a.jpg?800|Uno SMD clonebottom view}} |
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| | ---- |
| | ^Genuine Arduino Uno R3 SMD :^ |
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| | /* {{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)) |
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| ====== References and Additional Resources ====== | ====== References and Additional Resources ====== |
| * | * {{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/hardware/uno-rev3-smd|Arduino UNO SMD docs (genuine version)]] |
| | * {{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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