Power Pins. The Arduino Pro Mini is a microcontroller board based on the ATmega328. It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, an on-board resonator, a reset button, and holes for mounting pin headers. Analog inputs 6 and 7 (present on the Mini and BT) cannot be used as digital pins. The voltage applied here is regulated to 3.3V before it gets to the processor. The Arduino Pro Mini is intended for advanced users who require flexibility, low-cost, and small size. ARDUINO PRO MINI is of two types they are differentiated based on CONTROLLER working voltage. If you have a supply that's greater than 3.3V (but less than 12V), you'll want to connect that to the RAW pin on the Mini. Then, go back up to Tools > Processor and select ATmega328 (3.3V, 8MHz) . VIN (sometimes labelled "9V"). Another point worth mentioning here is that the Arduino PRO MINI comes in two versions which are classified on the basis of their Operating voltage and their clock frequencies. 方法7：VinとGNDを接続する DC電源ジャックからArduinoへ電源を供給した上で、VinピンとGNDピンを接続する。 Arduinoのブロッキングダイオード（逆流防止ダイオード）が破壊され、ArduinoのPCB（ポリ塩化ビフェニル）が溶ける。 As a result, it doesn’t have a 3.3V regulator, and no USB connection. Now the Pro Mini is where things get interesting.

The Mega 2560 Pro with CH340 is compatible with the Arduino Mega 2560 but with a significantly reduced physical footprint for embedded applications. The board has a compact form factor of 38X52mm and is an excellent solution for developing projects based on ATmega2560. The Arduino Pro Mini is a microcontroller board based on the ATmega328 . The Mega 2560 Pro provides a large amount of I/O and memory and is ideal for larger projects.

The Mega Pro MINI CH340G / ATmega2560 board is based on the ATmega2560 microcontroller and the USB-UART adapter CH340. AE-ATMEGA328-MINI (Arduino Pro Mini 上位互換) (秋月電子) DFRduino Pro Mini V1.3(16M5V328) (秋月電子) Pro Mini 5V / 16MHz (eBay) - ATMega168 / ATMega328 が混在しているので注意！ Analog inputs 6 and 7 (present on the Mini and BT) cannot be used as digital pins.

The Mega2560 Pro Mini can be powered via the USB connection or with an external power supply. Not only choose the correct board "Arduino Pro or Pro Mini", do not forget to choose the right option: 168 or 328, 5V or 3.3V 2. Go to Tools > Board and select Arduino Pro or Pro Mini.
The board is compatible with Arduino Mega 2560. Arduino Education is committed to empowering educators with the necessary hardware and software tools to create a more hands-on, innovative learning experience.

Support I 2 C (TWI) communication using the Wire library (documentation on the Wiring website). The Mega 2560 Pro provides a large amount of I/O and memory and is ideal for larger projects. The Arduino Pro Mini in the Uncertain 7-Cube Project used a combination of right and straight male headers. Choose the appropriate board based on application.
Not only choose the correct board "Arduino Pro or Pro Mini", do not forget to choose the right option: 168 or 328, 5V or 3.3V 2. Package Includes: Mega 2560 Pro with CH340 USB; 2 x 16 male header (gold plated) This tells Arduino to compile the code with an 8MHz clock speed in mind, that way the delay(1000); calls will actually delay one second. The board has a compact form factor of 38X55mm and is an excellent solution for developing projects based on ATmega2560. This pin is akin to the VIN pin, or even the barrel jack, on the Arduino Uno.

Support I 2 C (TWI) communication using the Wire library (documentation on the Wiring website). The Arducam PRO Mini Atmega328 Development Board met all my expectations and then some. The One is 3V3 / 8 MHz version and the other is the 5V / 16MHz version.

Arduino Pro mini 3.3V @ 8Mhz "RobotDyn", in black, cheap and well finished; Arduino Pro mini 3.3V @ 8Mhz " The Simple ", in blue, the most common clone on the Internet (cheapest). To program: press the reset button AFTER the compilation has started, but BEFORE the compilation has ended. Arduino ProMiniについてArduino Unoと同じCPUを使いUnoから余計な回路を除外しできるだけ小さく（幅18mm 長さ33mm）まとめたボードです。余計な部品がないため、小さな機器への組み込みなどには向きますが、ブート The voltage applied here is To program: press the reset button AFTER the compilation has started, but BEFORE the compilation has ended.