Arduino Compatible Nano V3.0 ATmega328P CH340 Mini-USB Board (Unsoldered)

Arduino Compatible Nano V3.0 ATmega328P CH340 Mini-USB Board (Unsoldered) is a compact 45mm × 18mm 8-bit AVR microcontroller board supplied with separate unsoldered 15-pin male header strips and a 6-pin ICSP header. Furthermore, because the 30 through-hole GPIO pads come clean and unpopulated from the factory, hardware builders can solder 22–26 AWG hookup wires directly into the PCB holes for ultra-slim permanent enclosures, install female headers on top, or solder the included male pins for breadboard use. Consequently, it delivers the full 16 MHz ATmega328P + CH340G functionality of an Arduino UNO in a low-profile package.

Key Features:

• Clean Unpopulated Through-Hole Pads (Includes Loose Headers): Lets you solder wires directly into the PCB for minimum vertical height (4.5mm) or solder the included 2×15-pin and 2×3-pin male headers as needed.
• Full ATmega328P-AU 16 MHz Performance: 32KB Flash, 2KB SRAM, 1KB EEPROM, 14 digital I/O pins (6 PWM), and 8 analog 10-bit ADC inputs (`A0–A7`).
• Extra Analog Channels `A6` & `A7`: Exposes two additional 10-bit analog inputs from the 32-pin SMD ATmega328P package that are unavailable on the DIP-28 UNO R3.
• Reliable CH340G USB-to-Serial & Mini-USB Port: Connects via a sturdy Mini-USB Type-B cable for programming and serial monitor debugging.
• Onboard 5V Linear Regulator (`VIN` 7V–12V): Built-in AMS1117-5.0 voltage regulator powers the board and external 5V sensors from a 2S/3S battery or 9V/12V DC supply.

Technical Specifications:

• Microcontroller: Microchip / Atmel ATmega328P-AU (TQFP-32, 8-Bit AVR @ 16 MHz)
• USB-to-Serial IC: WCH CH340G
• Operating Logic Voltage: 5.0V DC
• External Input Voltage (`VIN` Pad): 7.0V to 12.0V DC Recommended (6V–20V Limits)
• Digital I/O Pads: 22 Digital I/O (`D0–D13` and `A0–A5`; 6 Hardware PWM Channels)
• Analog Input Pads: 8 Channels (`A0–A7`, 10-Bit SAR ADC)
• Memory: 32 KB Flash, 2 KB SRAM, 1 KB EEPROM
• USB Receptacle: Mini-USB Type-B Female Port

Mechanical Specifications:

• PCB Footprint: Standard 30-Pin DIP Layout (2.54mm Pitch, 15.24mm / 0.6-inch Row Spacing)
• Header Configuration: Unsoldered Pad Holes (Ships with 2 × 15-Pin Male Header Strips + 1 × 2×3-Pin ICSP Male Header in Bag)
• Mounting Holes: 4 × 1.8mm Corner Mounting Holes

Dimensions:

• Length: 45.0 mm
• Width: 18.0 mm
• Board Thickness (Unpinned): 4.5 mm
• Weight: ≈ 7.0 g (Including Loose Header Strips)

Pinout and Wiring:

• Power Pads: `VIN (Pin 30)` for 7V–12V DC input; `5V (Pin 27)` for regulated 5V output/input; `3V3 (Pin 17)` for 3.3V output (≤50mA); `GND` on Pins 4 and 29.
• Digital & Serial Pads (`D0–D13`): `D0 (RX) / D1 (TX)` UART, `D2 / D3` External Interrupts, `D3, D5, D6, D9, D10, D11` PWM, and `D10–D13` SPI.
• Analog & I2C Pads (`A0–A7`): `A4 (SDA)` and `A5 (SCL)` hardware I2C; `A6` and `A7` are analog-input-only pins.
• Engineering Precaution: When soldering the two 15-pin male header strips, insert both header strips into a solderless breadboard FIRST, place the Nano PCB over the pins to hold them perfectly parallel and vertical at 90°, and then solder each pad at 320°C–350°C.

Datasheet Reference:

• View Official Arduino Nano V3.0 Technical Datasheet & Pinout PDF

Commonly Used in:

• Slim 3D-Printed Handheld Enclosures, RC Transmitters, and Drone Payloads
• Direct Point-to-Point Wire Soldering in Permanent Industrial & Prop Builds
• Custom Motherboards and Breadboard Prototyping

Applications:

• Low-Profile Direct Wiring: Solders silicone ribbon wires directly into `5V`, `GND`, and GPIO holes without adding 15mm of pin-header height.
• Inverted or Right-Angle Header Builds: Allows installing female sockets, right-angle headers, or top-side pins that are impossible on pre-soldered boards.
• Compact Sensor & NeoPixel Controllers: Fits inside LED light tubes, cosplay props, and miniature sensor housings.

Equivalent Models:

• Arduino Compatible Nano V3.0 (With Soldered Headers): Identical board with all 30 bottom pins and 6 ICSP pins factory-soldered.
• Arduino Nano V3.0 ATmega328P CH340 – Type-C: USB Type-C revision of the Nano V3.0.
• Arduino Nano CH340X SuperMini Type-C: Even smaller modernized USB-C Nano variant.

Package Includes:

• 1 × Arduino Compatible Nano V3.0 ATmega328P CH340 Mini-USB Board (Unsoldered)