{"product_id":"arduino-pro-mini-3v3-8mhz-atmega328p","title":"Arduino Pro Mini 3.3V 8MHz ATmega328P Microcontroller Board","description":"\u003ch2\u003eArduino Pro Mini 3.3V 8MHz – ATmega328P Microcontroller Board\u003c\/h2\u003e\u003cp\u003eThe Arduino Pro Mini 3.3V 8MHz is a compact, low-power microcontroller board based on the ATmega328P, running at 3.3V logic with an 8MHz crystal oscillator. This variant is the go-to choice for battery-powered and low-power embedded applications where 3.3V peripherals (e.g. GPS, GSM, NRF24L01, LoRa, SD cards) need to interface directly without level shifting. No USB interface on-board — programming via an external FTDI 3.3V or CP2102 USB-to-Serial adapter.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMicrocontroller: ATmega328P (same core as Arduino Uno)\u003c\/li\u003e\n\u003cli\u003eOperating Voltage: \u003cstrong\u003e3.3V\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eClock Speed: \u003cstrong\u003e8MHz\u003c\/strong\u003e crystal oscillator\u003c\/li\u003e\n\u003cli\u003e14 digital I\/O pins (6 PWM outputs)\u003c\/li\u003e\n\u003cli\u003e8 analog input pins (10-bit ADC)\u003c\/li\u003e\n\u003cli\u003eFlash Memory: 32KB (2KB used by bootloader)\u003c\/li\u003e\n\u003cli\u003eSRAM: 2KB | EEPROM: 1KB\u003c\/li\u003e\n\u003cli\u003eOperating current: ~6mA typical (lower than 5V variant)\u003c\/li\u003e\n\u003cli\u003eInput voltage: 3.3V via VCC pin or 3.35V–9V via RAW pin (on-board regulator)\u003c\/li\u003e\n\u003cli\u003eUltra-compact: 33mm × 18mm PCB\u003c\/li\u003e\n\u003cli\u003eCastellated \/ through-hole edge pads for direct PCB integration\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003ePin Highlights\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDigital Pins:\u003c\/strong\u003e D0–D13 (D0\/D1 = UART TX\/RX)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalog Pins:\u003c\/strong\u003e A0–A7\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePWM Pins:\u003c\/strong\u003e D3, D5, D6, D9, D10, D11\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSPI:\u003c\/strong\u003e D10 (SS), D11 (MOSI), D12 (MISO), D13 (SCK)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eI2C:\u003c\/strong\u003e A4 (SDA), A5 (SCL)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProgramming Header:\u003c\/strong\u003e DTR, RX, TX, VCC, GND, GND (FTDI 3.3V compatible)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTypical Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBattery-powered sensor nodes and data loggers\u003c\/li\u003e\n\u003cli\u003e3.3V peripheral interfacing (GPS, GSM, NRF24L01, LoRa, SD card) without level shifting\u003c\/li\u003e\n\u003cli\u003eWearable electronics and ultra-compact embedded systems\u003c\/li\u003e\n\u003cli\u003eLow-power IoT edge nodes with sleep modes\u003c\/li\u003e\n\u003cli\u003eDirect PCB integration via castellated pads\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e3.3V vs 5V Variant – Which to Choose?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eUse \u003cstrong\u003e3.3V \/ 8MHz\u003c\/strong\u003e when running on batteries, interfacing with 3.3V-only modules, or minimizing power consumption\u003c\/li\u003e\n\u003cli\u003eUse \u003cstrong\u003e5V \/ 16MHz\u003c\/strong\u003e when maximum processing speed is needed or working with 5V peripherals\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eProgramming\u003c\/h3\u003e\u003cp\u003eRequires a \u003cstrong\u003e3.3V FTDI or CP2102 USB-to-Serial adapter\u003c\/strong\u003e — do NOT use a 5V adapter as it will damage the board. In the Arduino IDE, select \u003cem\u003e\"Arduino Pro or Pro Mini\" → ATmega328P (3.3V, 8MHz)\u003c\/em\u003e.\u003c\/p\u003e","brand":"Generic","offers":[{"title":"Default Title","offer_id":47133087662252,"sku":null,"price":1210.0,"currency_code":"PKR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/0214\/4940\/files\/ArduinoLeonardoR3Board_ATMEGA32U4_d4f0325a-da77-4dc0-8941-eede7691437c.jpg?v=1788598489","url":"https:\/\/www.mcustore.com\/products\/arduino-pro-mini-3v3-8mhz-atmega328p","provider":"My Store","version":"1.0","type":"link"}