Pololu USB-to-Serial Adapter
CH551 is a $1.80 USB Mini Development board based on the 8-bit C51 micro-controller - Electronics-Lab.com
ATmega328P CH340 USB Microcontroller Board Arduino Compatible – Envistia Mall
6.90.00 emPower USB Host Board - Segger | Mouser
Amazon.com: TISEKER Mini Nano V3.0 ATmega328P Microcontroller Board with USB Cable for Arduino : Electronics
Arduino Micro USB Microcontroller
$10 microcontroller with USB-C, BLE and lipo! : r/ErgoMechKeyboards
Tomu: A Microcontroller For Your USB Port | Hackaday
Waveshare RP2040-Tiny Development Board, Raspberry Pi Microcontroller Development Board, Based On Official RP2040 Dual Core Processor, USB Port Adapter Board Optional
![Adafruit Trinket - Mini Microcontroller - 3.3V Logic [MicroUSB] : ID 1500 : $6.95 : Adafruit Industries, Unique & fun DIY electronics and kits](https://cdn-shop.adafruit.com/970x728/1500-13.jpg "Adafruit Trinket - Mini Microcontroller - 3.3V Logic [MicroUSB] : ID 1500 : $6.95 : Adafruit Industries, Unique & fun DIY electronics and kits")
Adafruit Trinket - Mini Microcontroller - 3.3V Logic [MicroUSB] : ID 1500 : $6.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Arduino Uno R3 USB Microcontroller - RobotShop
Amazon.com: ciciglow RP2040 Microcontroller with USB A Male Port, Dual Core 264KB 2M Flash Development Kit with Rich Interfaces, Support for C, for Python Development : Electronics
Pololu - Wixel Programmable USB Wireless Module
MTM-USBStem: USB Microcontroller Module | Acroname
Pro Micro Microcontroller ATmega32U4 5V 16MHz - kriscables
Nano Microcontroller R3 Unsoldered (Compatible with Arduino Nano) - Type-C USB - hit.ps
Mini ATTINY85 MICRO Module USB Digispark Kickstarter CJMCU Microcontroller for Arduino Development Board Electronic Components - AliExpress
Pro Micro (USB-C Version) - 5V/16MHz - Arduino-compatible ATmega32U4 – Keebio
Arduino DUE - An Arduino Microcontroller Board - DFRobot
CH552G Development Board / Core Board 8051 USB Microcontroller CH551G / CH552G / CH554G WCH - AliExpress
PIC-USB-4550
Teensy 3.2 USB Development Board — Arduino Online Shop
Ch552g Development Board / Core Board 8051 Usb Microcontroller Ch551g / Ch552g / Ch554g Wch - Demo Board - AliExpress
USB to Microcontroller Interface - Electrical Engineering Stack Exchange
