Pro Micro Compatible Board - 5V/16MHz
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The Pro Micro is similar to the Pro Mini except it uses an ATmega32U4 rather than an ATmega328 microcontroller on board. The USB transceiver inside the 32U4 incorporates USB connectivity on-board and does away with a bulky external USB interface. This tiny micro-controller board does all of the Arduino tricks that you're familiar with: 4 channels of 10-bit ADC, 5 PWM pins, 12 DIOs as well as hardware serial connections for Rx and Tx.
Pro Micro ATmega32U4 5V 16MHz Leonardo replaces ATmega328 Pro Mini Arduino
1/3pcs Pro Micro Board for ATmega32U4 for Leonardo 5V 16MHz Development Board Micro-Controller Board for Arduino with Pin Header - AliExpress
Pro Micro ATmega32U4 3.3V 5V Module Board for Arduino – diymore
flashtree 4pcs Pro Micro Atmega32U4 5V 16MHz Bootloadered IDE Micro US
Cytron Arduino Pro Micro Compatible w/ Pre-soldered Headers - RobotShop
Spice up your DIY keyboard builds with this little microcontroller, which works with the TMK and QMK firmware. It's got 18 pins for you to work with.
Pro Micro (Micro-USB) - 5V/16MHz - Arduino-compatible ATmega32U4
flashtree 4pcs Pro Micro Atmega32U4 5V 16MHz Bootloadered IDE Micro US
Pro Micro With The Bootloader Atmega32u4 5v/16mhz Module - Temu
5Pcs Atmega328P Pro Mini Board 5V 16MHz FT232RL FTDI Cable Mini USB fo – eElectronicParts
