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ATmega328P 8-bit AVR RISC microcontroller with 32 KB Flash, 2 KB SRAM, 1 KB EEPROM, 6 PWM channels, and 8-channel 10-bit ADC in 32-pin TQFP package.","atmega328p",{"id":764,"kind":765,"label":766,"silkscreenLabel":767,"x":768,"y":769,"width":770,"height":771,"showLabelOnBoard":116,"labelPosition":87,"description":772},"xtal_16mhz","crystal_smd","16.0MHz","Y1",3.44,12.4,1.6,3.2,"Murata CSTCE 16.000 MHz (or 8.000 MHz on 3.3V models) ceramic resonator with built-in load capacitors providing system clock.",{"id":774,"kind":775,"label":776,"subLabel":777,"silkscreenLabel":778,"x":779,"y":779,"width":780,"height":781,"showLabelOnBoard":20,"labelPosition":87,"description":782},"reg_mic5205","voltage_regulator","MIC5205","5.0V","U2",7.44,2.9,2.8,"Micrel MIC5205 ultra-low-noise 150mA LDO regulator stepping down RAW voltage (up to 12V DC) to clean 5V (or 3.3V) system VCC.",{"id":784,"kind":785,"label":786,"subLabel":787,"silkscreenLabel":788,"x":789,"y":790,"width":771,"height":770,"showLabelOnBoard":116,"labelPosition":87,"description":791},"cap_in","capacitor_tantalum","10µF Input (C13)","10µF","C13",3.1,6.19,"10µF tantalum input decoupling capacitor stabilizing RAW power rail before voltage regulator.",{"id":793,"kind":785,"label":794,"subLabel":787,"silkscreenLabel":795,"x":796,"y":797,"width":771,"height":770,"showLabelOnBoard":116,"labelPosition":87,"description":798},"cap_out","10µF Output (C19)","C19",11.61,8.09,"10µF tantalum output decoupling capacitor stabilizing VCC power rail.",{"id":800,"kind":801,"label":802,"silkscreenLabel":803,"color":804,"x":805,"y":806,"width":770,"height":807,"showLabelOnBoard":20,"labelPosition":87,"description":808},"led_pwr","led_smd","PWR","ON","#ef4444",8.12,10.75,0.8,"Red power indicator LED connected to VCC through current-limiting resistor.",{"id":810,"kind":811,"label":243,"silkscreenLabel":237,"x":812,"y":813,"width":137,"height":814,"showLabelOnBoard":20,"labelPosition":43,"description":815},"btn_rst","button_smd",7.52,29.1,2.5,"Tactile reset pushbutton pulling the active-low \u002FRESET pin to GND.",{"id":817,"kind":801,"label":818,"silkscreenLabel":819,"color":820,"x":821,"y":822,"width":770,"height":807,"showLabelOnBoard":20,"labelPosition":43,"description":823},"led_d13","D13","L","#22c55e",12.92,30.89,"Green user status LED connected to digital pin 13 (SCK) via active-high buffer.",{"id":10,"name":825,"manufacturer":825,"ecosystem":825,"descriptionKey":826},"Arduino","families.arduino.description",[828,835,842],{"id":14,"publisher":829,"title":830,"documentType":831,"version":832,"url":833,"accessedDate":834},"Arduino \u002F SparkFun","Arduino Pro Mini Documentation and Pinout Reference","user_guide","v14","https:\u002F\u002Fdocs.arduino.cc\u002Fretired\u002Fboards\u002Farduino-pro-mini","2026-09-16",{"id":15,"publisher":836,"title":837,"documentType":838,"version":839,"url":840,"accessedDate":841},"Microchip Technology","ATmega328P 8-bit AVR Microcontroller Datasheet","datasheet","Rev. 7810D","https:\u002F\u002Fww1.microchip.com\u002Fdownloads\u002Fen\u002FDeviceDoc\u002FAtmel-7810-Automotive-Microcontrollers-ATmega328P_Datasheet.pdf","2026-09-13",{"id":16,"publisher":843,"title":844,"documentType":845,"version":832,"url":846,"accessedDate":834},"SparkFun Electronics","Arduino Pro Mini 328 Schematic and Eagle Hardware Files","schematic","https:\u002F\u002Fgithub.com\u002Fsparkfun\u002FArduino_Pro_Mini_328",[848,851,854,857],{"slug":849,"name":850},"arduino-mega-2560","Arduino Mega 2560 Rev3",{"slug":852,"name":853},"nodemcu-v2-cp2102","NodeMCU v2 Amica (ESP8266)",{"slug":855,"name":856},"raspberry-pi-gpio-40pin","Raspberry Pi 40-Pin GPIO Header",{"slug":858,"name":859},"raspberry-pi-pico","Raspberry Pi Pico",[],[],{"title":863,"description":864,"card":865,"intro":866,"safe":867,"adc":868,"interfaces":869,"strapping":870,"input":871,"overview":872},"Arduino Pro Mini Pinout & Reference","Interactive Arduino Pro Mini pinout diagram: 24 DIP pins, 6-pin FTDI header, 4 internal analog pads (A4-A7), RAW vs VCC power rules, 5V\u002F16MHz and 3.3V\u002F8MHz specs.","Ultra-compact ATmega328P development board with 24 DIP pins, 6-pin FTDI header, and 8 analog inputs.","The Arduino Pro Mini is an ultra-compact ATmega328P board designed by SparkFun for permanent or space-constrained embedded installations. Requiring an external USB-to-UART adapter for sketch uploads, it delivers full Uno performance in a lightweight 18x33mm form factor.","Operates at 5V (or 3.3V) logic. Continuous DC current per I\u002FO pin should not exceed 20 mA (40 mA absolute max). The RAW pin accepts 5.5V to 12V DC input.","Pins A0 through A7 provide 8 channels of 10-bit analog conversion. Note: A6 and A7 are dedicated analog inputs and cannot be used as digital GPIO.","Hardware UART on D0 (RX) and D1 (TX) plus FTDI header. SPI on D10 (SS), D11 (MOSI), D12 (MISO), D13 (SCK). I2C on internal pads A4 (SDA) and A5 (SCL).","Standard 8-bit AVR architecture. Pin D13 drives the onboard user LED (L). DTR on the FTDI header auto-resets the MCU via a 100nF capacitor.","Pins D2-D12 and A0-A5 are bidirectional GPIO with internal software-configurable pull-ups (~20-50 kΩ). Pins A6 and A7 lack digital input buffers.",{"summary":873,"power":874,"variants":878,"before":881},"The Arduino Pro Mini is a minimalist ATmega328P development board designed for space-sensitive and low-power installations. It eliminates the bulky USB connector and USB-to-serial converter, breaking out 24 breadboard-friendly DIP pins, an industry-standard 6-pin FTDI header, and 4 offset internal analog pads.",{"raw":875,"vcc":876,"ftdi":877},"RAW Pin: Unregulated DC input (5.5V to 12V) stepping down through the onboard MIC5205 low-dropout regulator to provide system VCC.","VCC Pin: Regulated power rail directly powering the ATmega328P MCU. Feed 5.0V (or 3.3V) here; exceeding 5.5V permanently destroys the microcontroller.","FTDI 6-Pin Header: Provides 5V\u002F3.3V power during programming while connecting RX, TX, and DTR for automatic sketch uploading.",{"v5_16mhz":879,"v33_8mhz":880},"5V \u002F 16 MHz Variant: Runs at 16 MHz resonator clock with 5V logic. Delivers full Arduino Uno computing speed and 5V sensor compatibility.","3.3V \u002F 8 MHz Variant: Runs at 8 MHz resonator clock with 3.3V logic. Ideal for battery-powered projects and direct connection to 3.3V sensors.",{"raw_vs_vcc":882,"ftdi_orientation":883,"analog_only_a6_a7":884,"d13_led":885},"RAW vs VCC Power Trap: Never connect unregulated battery or DC adapter voltages (>5.5V) to VCC. Only use the RAW pin for unregulated inputs.","FTDI Connector Orientation: Align the BLK pin with GND (black wire) and GRN with DTR (green wire). Reversing the programmer can short power to ground.","A6 and A7 Are Analog-Only: Pins A6 and A7 on the ATmega328P TQFP-32 lack digital I\u002FO buffers. pinMode() and digitalRead() do not work on these channels.","Pin 13 Shared with User LED: Digital pin 13 is connected to an onboard LED and current-limiting resistor, which may load sensitive high-impedance sensors.",1791663946072]